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97 dodge intrepid wont start after it overheated?


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cray51065
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Sep 24, 2011, 6:32 PM

Post #1 of 25 (2995 views)
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   97 dodge intrepid wont start after it overheated? I have a 1997 Dodge Intreped with a 3.3 litre v-6.... the car overheated and after it cooled down we added some water (water pump was bad) it started back up then dies a few seconds later.. Now after 3 different computers,,,, cam sensor and crank sensor and coil pack it still has no spark... it has compression but has no fire to the plug wires....... did fuel pressure test and has 60 lbs of pressure and a nice steady stream of fuel.. also clean sanded and geased the computer grounds and still has no fire.


Tom Greenleaf
Ultimate Carjunky / Moderator


Sep 24, 2011, 10:17 PM

Post #2 of 25 (2970 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

May be hard to do with whatever situation car is in or at but hard computer codes may help if you can get them read,

T
_________________________________________
Long retired now


Discretesignals
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Sep 24, 2011, 11:42 PM

Post #3 of 25 (2963 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Did you replace the leaking water pump?
Do you have injector pulse?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Sep 24, 2011, 11:44 PM)


cray51065
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Sep 25, 2011, 1:10 PM

Post #4 of 25 (2945 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Not sure if it has injector pulse.. can I use a test light to see?... it has fuel 60lbs and a good stream of fuel.. just no spark... after it overheated it was filled with water and it started and seemed to run fine, closed the hood and it died and has not fired since.. it was towed to a shop and they replaced the computer twice ans was saying they has a 2 band ones.... we are at a loss now.. I have installed a crank and cam sensor and the coil pack.. still no spark


cray51065
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Sep 25, 2011, 1:14 PM

Post #5 of 25 (2944 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

It had codes 11 and 12 in faults i know one is no distributor reference not sure on the other.. i think so fire when cranking... also have checked and cleaned grounds and swapped out relays to etax. NOTHING im pulling my teeth out here


Mr.scotty
Enthusiast


Sep 25, 2011, 9:07 PM

Post #6 of 25 (2926 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Yes you can use a noid light or a 12volt LED or light bulb to test for injector pulse.
--------------------------------------------------------

Your only as good as your tools!


Discretesignals
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Sep 25, 2011, 9:39 PM

Post #7 of 25 (2920 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Code 12 is a battery disconnect code.
Code 11 means the PCM didn't see the crank reference signal while the engine was cranking.

If you are missing the crank reference signal, you might as well forget about checking injector pulse, because you won't have it.

Unplug the crankshaft position sensor connector and check for voltage and ground in the pins in the connector. Do not use a test lamp to check for voltages on the yellow and dark blue/white wires.

*Yellow wire should have 8 volts with ignition on.

*Black/dark green wire should have 0 ohms and will light a 12 volt test lamp connected to battery positive

*Dark blue/white should have 5 volts with ignition on





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cray51065
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Sep 26, 2011, 12:18 AM

Post #8 of 25 (2913 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Thanks I will check for voltage on those wires and see if my local parts store has a noid light... I was an ase auto tech. but got away from it in 94 and went to diesel and heavy equipment.... cars have changed alot over the years....
Just stumped as why it over heated from bad water pump and after we put water in it and closed the hood it died and has had no spark since then been 6 weeks... shop had it for 5 weeks and kept saying pcm pcm well after 2 new ones it still has no spark.... I replaced coil crank and cam sensors... still no spark


Discretesignals
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Sep 26, 2011, 12:27 AM

Post #9 of 25 (2911 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Welp, we can see if the computer is even getting position signals, but you should check those voltages first and the ground first. If you have what you need at the sensor's connector, then you can check for a signal at the computer while cranking the engine. Just have to do some troubleshooting to see what is missing. Seems to me that the repair shop was guessing and playing swaptronics.





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cray51065
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Sep 26, 2011, 12:42 AM

Post #10 of 25 (2907 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Thanks for the info... it may take me a few days to get back to it.. I drive a semi and works some crazy hours so bear with me


cray51065
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Sep 28, 2011, 6:59 PM

Post #11 of 25 (2886 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Ok I have a black and blue stripe wire that is ground..orange wire has 8.6 volts and blue and black stripe wire has less then 1/2 volt showing on it.....


Discretesignals
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Sep 28, 2011, 9:24 PM

Post #12 of 25 (2876 views)
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Your right. You have an LH body so the colors are going to be what you typed. You seem to have everything you need from the computer to the crank sensor.

Next, your going to have to disable the ignition system, so the car doesn't start. You still need the power from the computer to the crank sensor. To disable the ignition unplug the coil pack.

You'll have to back probe the crank sensor connector at the dark blue/ with light blue stripped wire (5 volt).



You want the connector plugged into the crank sensor and your meter's red lead connected to the back probe. The meter's black lead goes to the negative side of the battery.

The crank sensor is called a hall effect sensor. It is nothing more than a digital switch that opens and closes the 5 volt reference from the computer to ground. As an interrupter passes over the sensor the sensor grounds the 5 volt signal. You meter will show 0 volts when this happens. As an interrupter leaves the sensor the voltage goes back to 5 volts.

If you were to be able to see the on and off signal that is generated by the sensor as the crank shaft is turning it would look like the waveform on the left.



Your digital meter isn't fast enough to watch the voltage change from 0 to 5 V as the engine is running, so the meter is going to average out the voltage to 2.5 volts on a running engine.

Since the engine isn't running, you can bump the starter while watching your meter or you can turn the engine by hand with the ignition on. The meter should show 0 volts when the interrupter passes over the sensor and then back to 5 volts until another interrupter passes. If you see this switching occurring on your meter, then the crankshaft sensor is working and the interupter is interupting..lol.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


cray51065
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Sep 30, 2011, 7:11 PM

Post #13 of 25 (2853 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Ok bumping the starter I got like 3.40 volts as it passes by the flywheel


Discretesignals
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Sep 30, 2011, 9:24 PM

Post #14 of 25 (2846 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

You might have to go a little slower and turn the crank by hand while watching the voltage. See if the voltage goes to zero and then back to 5 volts.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


cray51065
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Oct 1, 2011, 5:56 PM

Post #15 of 25 (2837 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

I had 3.5 volts yesterday and now when I try to roll it around by hand I cant get anything. Im pretty sure the cam sensor is good... you can hear the relay clicking as you roll it over and when you un plug the cam sensor it stops.


Discretesignals
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Oct 1, 2011, 11:17 PM

Post #16 of 25 (2830 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Ok, now you have me confused. Are you checking the cam sensor or the crank sensor? Which relay is clicking. Might be the fuel pump relay because the computer is detecting engine speed.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Oct 1, 2011, 11:17 PM)


Hammer Time
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Oct 2, 2011, 7:52 AM

Post #17 of 25 (2822 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Sounds like he's cycling the key to rotate the engine instead of doing it by hand




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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.



cray51065
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Oct 2, 2011, 12:59 PM

Post #18 of 25 (2808 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Ok I had 3.5 volts the other day as I bumped the starter with the coil unhooked.... when you told me to roll it by habd I dont have voltage in the wire you told me to back probe... you can hear the relay clicking in the fuse box... that relay stops clicking when I unplug the cam sensor... so it could very well be the fuel pump relay working...


cray51065
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Oct 2, 2011, 4:38 PM

Post #19 of 25 (2798 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

sorry Yes I was checking the crank sensor.. you can hear a relay clicking when you roll it by hand and when you unhook the can sensor it stops.. sorry I was just messing around when I was checking crank senson


cray51065
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Oct 6, 2011, 9:43 PM

Post #20 of 25 (2765 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

what do I do next?


Discretesignals
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Oct 6, 2011, 10:03 PM

Post #21 of 25 (2762 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Ok,

You were checking the crank sensor signal voltage with your meter and while rotating the engine you noticed a relay clicking. Was the relay clicking the fuel pump relay? If it was, that means that the computer is detecting a crank pulse when you rotated the engine.

Next thing you want to check is the cam sensor signal. The cam sensor works exactly the same as the crank sensor, but it detects when number 1 cylinder is TDC. Unplug the cam sensor connector and check for 8 volts on the orange wire, 5 volts on the tan/yellow wire, and 0 ohms on the black/light blue wire with the ignition on.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Oct 6, 2011, 10:04 PM)


cray51065
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Oct 8, 2011, 7:40 PM

Post #22 of 25 (2731 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Well here is a mind blowing event for you.... I went back and rechecked the crank sensor and rolled it very slow by hand and got the 5 volts we are looking for.... so I thought when I did a compression test I only did 4 cyls. So i thought whats it goin to hurt to check them all.... so I take all 6 plugs out and do another compression test and I thought I herd a spark but wasnt sure... After I reinstalled all the spark plugs hooked up all the wires and cranked it it fired right up after 8 weeks of not running....


So how does it overheat and not start for 8 weeks now runs like a champ???
I think its time for 5 gallons of gas and a match


Discretesignals
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Oct 8, 2011, 7:52 PM

Post #23 of 25 (2727 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Hmmm. You have the magic touch?

You should wiggle the harnesses around. especially at the crank sensor, while the engine is running to see if it quits. Could have a wiring issue at or near one of those connectors you might have been moving around.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


cray51065
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Oct 8, 2011, 9:33 PM

Post #24 of 25 (2718 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Id say the majic touch... lol.... got the car to die by tugging on the crank sensor wires... so I cut open the insulation around the wires and found some bare wires.... I seperated the bare wires and if you still touch the crank sensor at the plug the car will die.. I think this car is haunted... wiggle crank sensor plug side to side and up car stays running but push down just a little and it dies.... lol
I know the crank sensor wire rens around the back side of the head but where does it go from there?? got dark on me and ran out of time.... im thinkin of goin to local junk yard and getting a harness or just splicing the wires and a good spot and goin from there...

here is what I think happened to the harness to rot the wires.... the crank sensor wires run alon and behind the EGR tube off the manifold and I think that over the years of excessive heat that they just got rotten... so maybe if you ever have this happen again with somebody else it might be a quickk fix.. somehow it just happened that same time water pump went bad and car over heated.


Hammer Time
Ultimate Carjunky / Moderator


Oct 8, 2011, 11:15 PM

Post #25 of 25 (2713 views)
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Re: 97 dodge intrepid wont start after it overheated? [In reply to] Sign In

Check the tension of the contacts inside the plug and bend them with a pick if necessary for a tighter contact on the pin.




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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.





97 dodge intrepid wont start after it overheated?


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