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1998 ford escort zx2 dohc fuel problem


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dwaynepippin
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Aug 11, 2010, 2:40 PM

Post #1 of 24 (10826 views)
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  post locked   post icon 1998 ford escort zx2 dohc fuel problem  

i have a 1998 ford escort dohc 2.o..... my problem is my fuel pump isnt working..let me tell you what i have done so far... first off i checked the inertia switch(good to goSmile).got a new fuel pump(still no changeUnsure) got a new constant control module(or relay module-there is a couple names for this)( no changeUnsure ) i have looked for inline fuses which i cannot seem to find if there is any or not.when i turn the key on the pump makes no noise at all..i have checked for voltage to the pump and its got nothing but low voltage on some wires,but not a full 12vlts.i am very good at working on cars just got puzzled on this.. if it helps i am willing to give my cell number to who ever is willing to talk to me about this...im 38 and live in anderson california...2 hours north of sacramento, i am disabled and limited due to bad back problem with multiple surgeries.. please help me. this is my only means of transportation for my young daughter and i..ty.. you can also write on personal info deleted


(This post was edited by pippin72 on Aug 23, 2010, 11:07 PM)


Hammer Time
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Aug 11, 2010, 3:22 PM

Post #2 of 24 (10811 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

Your can has a variable speed fuel pump that works on Pulse Width Modulation controlled by a module called the Fuel pump Driver Module. Verify that it's receiving power on the blue wire during the first 2 seconds of "key on"

It's located behind the trim panel on the left side in the trunk.
Locations Full Body Views (Part 1 Of 2)




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(This post was edited by Hammer Time on Aug 11, 2010, 3:24 PM)


dwaynepippin
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Aug 11, 2010, 3:36 PM

Post #3 of 24 (10807 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

i know where this is . i seen it when i was looking for inertia switch..... if im not getting anything or if i am--- to the blue wire then what? and i just want to thank you for trying to help me. it means alot


Hammer Time
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Aug 11, 2010, 3:49 PM

Post #4 of 24 (10803 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

If you have power, that means everything is OK up to that point and the problem will be the module, the PCM or the pressure sensor in the fuel pump, most likely the module. You can test for power out of the module using a voltmeter between the
blue/blk and the blue/wht wires.






Engine Controls (Part 4 Of 10)




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dwaynepippin
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Aug 11, 2010, 3:53 PM

Post #5 of 24 (10800 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

ok, well i bought a new module already and it didnt change anything . so do i still need to check the blue wire for current or is my main computer brain bad also?


Hammer Time
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Aug 11, 2010, 4:01 PM

Post #6 of 24 (10792 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

You've gone about as far as you can go without a professional scan tool now. You have already thrown too many parts at it. It's time to have it professionally looked at.




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dwaynepippin
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Aug 11, 2010, 4:12 PM

Post #7 of 24 (10786 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

and if i dont have power it will be the pcm or the driver module? those are they only 2 things that have not been replaced.. iwill have to check these out tomorrow. my back can only take a little bending .. ty..


Hammer Time
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Aug 11, 2010, 4:15 PM

Post #8 of 24 (10782 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

Your not listening. You can't go any further without a scan tool with bidirectional controls. You can't just keep throwing parts at it. It may not even be a part problem.
You have already wasted more in parts that the diagnosis would have cost in the first place.




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dwaynepippin
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Aug 11, 2010, 4:20 PM

Post #9 of 24 (10779 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

ok, well ty for for your help.. i will get back to when the problem is found. have a great day..


dwaynepippin
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Aug 12, 2010, 2:34 PM

Post #10 of 24 (10760 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

i was told to hook my obd2 scanner up ans see what it says. but it is telling my now that it cant establish a connection to vehicle. never had this problem before...


Hammer Time
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Aug 12, 2010, 2:41 PM

Post #11 of 24 (10754 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

Unless you have a professional, bidirectional scan tool, you are just wasting your time. Your generic OBD2 code reader is not going to cut it with this problem.




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sidom
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Aug 12, 2010, 10:05 PM

Post #12 of 24 (10748 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

It may be time to take this one in.....

I've seen this scenairo 1 time before, on a Mustang... It wound up being a bad fuel pump & spiked PCM.

It's WAY too early to condemning anything yet but this one is really starting to get past a DIY diagnosis.






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dwaynepippin
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Aug 12, 2010, 10:16 PM

Post #13 of 24 (10740 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

quick note if it matters------I have a can obd2+1 scanner, (innova 3120 model).and i have updated the software just the other day to make sure it was current..


Hammer Time
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Aug 12, 2010, 10:19 PM

Post #14 of 24 (10737 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

Does it have the ability to energize the fuel pump circuit through the PCM for testing?




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sidom
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Aug 12, 2010, 10:36 PM

Post #15 of 24 (10733 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

At this point the 1st step would be establishing communication. You are going to need a scanner that can access the other modules. If you can talk to the other modules but not the PCM, then that's not a good thing. If you can't communicate with anything, then you could have a scanner issue. It could be something as simple as a blown cigarette lighter fuse.

I've just skimmed this thread and it's really hard to tell if you are getting 12v or not.... It might be a good idea to just go in and manually power up the fuel pump to see if it's good or bad and have that question answered once & for all....






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dwaynepippin
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Aug 13, 2010, 2:17 PM

Post #16 of 24 (10725 views)
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My scanner runs off 2 types of power sources. 1 is internal batterys in the scanner and the other thru the battery of the car,i dont have to plug into cigarette lighter or anything else. just the diagnostic port..

and i have tested the fuel pump manually and it does work.. just for some reason its not giving it thru the wires where it plugs in at the pump at the tank..

I was told by a old mechanic that my pump works off ground and not power???? i dont really understand that, any help or just ignore what he said....? he also said something about the fuel pump driver mudule in the trunk?( i know where it is) how do i check it ? if needed?



---Just to go over what ive done so far---

1. checked fuel pressure ---zero- fuel pump does not come on-- nothing changed
2. checked inertia switch to make sure it wasnt tripped--was not tripped
3. checked all fuses under dash and in main box in engine compartment- all were good
4. replaced relay control module in the engine compartment--nothing changed(i can return for refund)
5. tested new and old pump by hooking up direct current- both pumps ended up working(never installed in tank- i can still take new one back, my friend is head manager at parts store)


Sidom
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Aug 13, 2010, 11:31 PM

Post #17 of 24 (10717 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

Ok in a nutshell how they work.

A basic fuel pump has a fixed ground and the PCM supplies the power to it.

On your system there is a fuel pump driver module that controls the power AND the ground. The FPDM controls the demand by basically turning the ground on & off, a duty cycly. The PCM tells the FPDM how much fuel it needs and it adjusts the duty cycle accordingly.

With the correct tool it's fairly easy to pinpoint the trouble. There is a diagnostic PID the FPD uses to point out the area . Its a FPD PWM (pulse width modulation). Normally it's always around 50% (which is actually 100%). If the trouble is between the PCM & FPDM the PID will have duty cycle of 25%. It it's between the pump & FPDM it will read 75%.

The 1st thing you need to do is establish communication with the PCM or find out why you can't communicate. Most low end self powered code readers need the DLC to have power (usually supplied by cigarette lighter circuit) to work. Most will automatically power up when plugged into the DLC. If it doesn't, turning the coder reader power on won't help it communicate, it needs that DLC power source. If the DLC has power and still won't communicate, then a couple more scanners need to be tried to make sure your hardware isn't the problem.

If no scanner will communicate then there is a problem with the PCM or network.... I'm not trying to be a hard azz but I'm not good enough to remotely walk someone thru this process. My memory sux & stuff like this I really need to be there to do it...Like the FPD PWM PIDs...The diag numbers are correct (the 25% & 75%) but I sometimes get which is which backwards..

If you do have a PCM problem, there is a lot of things than need to be checked 1st before pulling the trigger on it and especially to make sure there wasn't a short that took it out that is STILL THERE that will take out the new PCM...

Good luck & let us know how you make out.....






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dwaynepippin
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Aug 17, 2010, 5:54 PM

Post #18 of 24 (10690 views)
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by running a direct wire to the fuel pump i was able to get it to pump fuel by ignition key on, the scanner still wont connect with replacement pcm and now i dont have spark.. i decided to spend the last of my money i get from ssi to have a shop down the street look at it with a limits on how much i can afford to spend to just tell me whats wrong,and not fix anything cause i cant get no more parts for now.. this really sucks....i really rely on my car for myself and my daughter to get to school,doctors appts out of town for my back etc...thanks to the president and the gov of california i have really been screwed for getting hurt on the job and not able to work anymore due to multiple back surgeries.. thanks to all of you that have tried to help me as much as you could.. it means alot to me that some people still have a heart...


Sidom
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Aug 17, 2010, 6:26 PM

Post #19 of 24 (10686 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

That's unfortunate and I was really hoping this would've been an easy fix for you.

I know you don't want to throw parts at it and I don't as well..... From what you've posted my "gut" tells me you have spiked PCM but those are way to expensive to be guessing at.


Good luck, I hope things work out for you and let us know how things work out for you.....






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dwaynepippin
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Aug 20, 2010, 2:05 PM

Post #20 of 24 (10661 views)
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ok finally got my car fixed.SmileSmile.. it was nothing but a few ground wires gone bad. the first one was the body to battery ground had corroded half way and you couldnt tell it was bad until you cut open the ground sleeve. the other bad spot was where the smaller grounds that come off the battery and plug into a small junction box that goto the pcm,relay control module box under the hood, about 5 wires or so there, they were all corroded. put new ground to body and also added a second ground for backup attached to engine block and fixed smaller wires and shazaam, all fixed. luckily i was able to return the new parts i had bought, oh i did replace my crank sensor because of where its at is hard to get to. but the grounds were my problem.. thank you to all that gave me very many suggestions for helping me.. you guys rock....WinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWink


Hammer Time
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Aug 20, 2010, 2:06 PM

Post #21 of 24 (10660 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

Glad you hear that. Did you find that problem yourself?




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dwaynepippin
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Aug 20, 2010, 2:11 PM

Post #22 of 24 (10656 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

unfortunately i didnt .. my back was really starting to hurt from all the bending etc and so i took it to a old school local mechanic that i met recently and he did the rest for me., im 38 and i have had 3 back surgeries and its a real draw on me when i have to do alot of bending etc, i just couldnt handle it anymore..


KingRey
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Sep 2, 2011, 12:19 PM

Post #23 of 24 (8942 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  


In Reply To
ok finally got my car fixed.SmileSmile.. it was nothing but a few ground wires gone bad. the first one was the body to battery ground had corroded half way and you couldnt tell it was bad until you cut open the ground sleeve. the other bad spot was where the smaller grounds that come off the battery and plug into a small junction box that goto the pcm,relay control module box under the hood, about 5 wires or so there, they were all corroded. put new ground to body and also added a second ground for backup attached to engine block and fixed smaller wires and shazaam, all fixed. luckily i was able to return the new parts i had bought, oh i did replace my crank sensor because of where its at is hard to get to. but the grounds were my problem.. thank you to all that gave me very many suggestions for helping me.. you guys rock....WinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWinkWink

Ok I have a 2000 for Escort ZX2 with almost identical problems. I was messing with the CCRM on my car because the A/C stopped working. This is the link to the info I found. link deleted....not allowed I followed the steps and when I hooked my CCRM back up the car wouldn't crank. The car will attempt to crank but it's like there is no gas getting to the engine. Before when I would turn the car to the on position I could hear the fuel pump engage. Now I hear nothing. My OBD2 is not connecting to my car and keeps giving an error code. I have a feeling it's the ground wires also because I was messing with the wiring and might have pulled somethingk loose. I picked up a used CCRM from the junk yard and I purchased a new fuel pump but I will probably check the wires before I replace them. If I can't figure it out I will take it in and have a Tech use the Scanner with the bidirectional controls to test my fuel pump. I am curious if it will even work since the OBD2 will not connect? Also, how much were you charged to get your car fixed? Thanks Rey


(This post was edited by Hammer Time on Sep 2, 2011, 2:15 PM)


Hammer Time
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Sep 2, 2011, 2:16 PM

Post #24 of 24 (8932 views)
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  post locked   Re: 1998 ford escort zx2 dohc fuel problem [In reply to]  

If you have a problem or a question you need to start a new thread of your own and links are not allowed.




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.





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