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ron_schaadt
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Feb 6, 2012, 6:03 PM
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1988 toyota camry
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ok all here is a good one for you i have a 1988 toyota camery with a 4 cylender it has a prolblem with flooding the cylinders what i have done is hooked up a scanner to it it gave a code 50 which is tpi stuck open replaced and ajusted new tpi then tested the injectors for ohms rating wich all passed test tested computer tested the ignighter also did an ohms test on the cold start temp valve and also the cold start timing sensor for the cold start injector then pulled the fuel rail and the cold start injector out hooked them up truned key on no spray which is good. then when key is turned to start all 4 will have a stream of fuel instead of atomized spray for first 3 sec then they go to atomized spray seems strange that all 4 spray constant with no pulse to them everything i test even the spark test good jumps .020 and is a good white color so i have a good air fuel and spark all i need to run but it still will not run oh yea also checked the harness near the egr for warn wires causing the injectors to fire have seen that problem before but not here. everything i test passes im out of ideas to look for? have also done a compression test on all 4 they have 165 psi per cylinder
(This post was edited by ron_schaadt on Feb 6, 2012, 6:13 PM)
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Discretesignals
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Feb 6, 2012, 6:32 PM
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Re: 1988 toyota camry
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If you still have the rail out, unplug the distributor's electrical connector and crank the engine. Do the injectors still spray?
Are you positive that was a code 50? You can also get flash codes by jumping TE1 to E1 in the diagnostic connector by the master cylinder and turning the ignition on. Check engine light will flash codes.
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 Feb 6, 2012, 6:36 PM)
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ron_schaadt
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Feb 8, 2012, 12:38 PM
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Re: 1988 toyota camry
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i will have to try that are they not supposed to spray when dist is unplugged have tried two distributors already with same results but ill try it cant get to the car till tomorrow
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ron_schaadt
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Feb 8, 2012, 12:42 PM
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Re: 1988 toyota camry
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it was the code for the tpi it said tpi is open which is the throttle sensor my brother is a mechanic and had the scanner we loked up the code cant remember if it was 50 or 51 but do remember it was for the tpi after replacing it the code was gone now no codes showing has lots of fuel good spark and air all 3 it needs to run but will not we are at a loss compression is 160 per cylinder should run
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Hammer Time
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Feb 8, 2012, 12:51 PM
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Re: 1988 toyota camry
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Are you sure you don't mean TP"S"?
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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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ron_schaadt
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Feb 9, 2012, 2:59 PM
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Re: 1988 toyota camry
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could be im into carberated engines it is the small black box on the side of the throttle body tells computer throttle position it is extreamly sensitive to adjust when replacing but after it was installed we double checked the setting to make sure it is to specks also was told by another mechanic to check the harness from firewall to starter and look for bare wires in harness due to the injectors all spraying at same time like someone flicked a switch thought they needed to pulsate with spark they think there are wires touching causing whole issue makes sense if they touch it would complete a circuit and cause them all to spray at same time tps does ring a bell it is the throttle sensor
(This post was edited by ron_schaadt on Feb 9, 2012, 3:02 PM)
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ron_schaadt
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Feb 9, 2012, 3:00 PM
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Re: 1988 toyota camry
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yes they do spray looks like i have wires touching causing a complete circuit
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Hammer Time
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Feb 9, 2012, 3:42 PM
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Re: 1988 toyota camry
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That is a TPS (Throttle Position Sensor)
The system has a "clear flood" mode at wide open throttle that shuts off the injectors so if the TPS is shorted and telling the computer wide open, it will shut the injectors off.
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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.
(This post was edited by Hammer Time on Feb 9, 2012, 3:46 PM)
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ron_schaadt
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Feb 10, 2012, 3:16 PM
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Re: 1988 toyota camry
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ok i unplugged the distributor from all power and sending abilities and then turned the key all 4 injectors still sprayed or should i say pissed out at the same time cant get to the car till monday morning now but then come monday im going to unplug the computer and see if they still spray and also look for a grounded wire in the harness from the firewall to the starter that runs injectors distributor ignighter and also the starter
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Discretesignals
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Feb 10, 2012, 3:35 PM
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Re: 1988 toyota camry
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I believe your right on the right track. Let us know how it goes.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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ron_schaadt
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Feb 13, 2012, 5:12 PM
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Re: 1988 toyota camry
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ok here is what i did i pulled the entire harness up from the firing wall to the starter and found 3 wires that were so brittle that when you touched them they broke one was the front o2 sensor wire fixed it other was temp sensor wire for od on trans fixed it third was oil pressure sending unit wire fixed it put harness back together insulating it good re taped it put it back in then noticed that the injectors have two sets of wires 2 and 4 get one set and 1 and 3 get the other wired them up correctly then connected the bat turned the key and it ran now i have no idea what fixed it other than guessing the o2 sensor wire is causing the computer to send wrong signal but is now running thank you all for your input
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Discretesignals
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Feb 13, 2012, 5:57 PM
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Re: 1988 toyota camry
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Interesting. Glad to see you figured it out.  The older EFI systems would batch fire injectors which explains why the injectors are wired that way. In your case it would fire two injectors at one time then the other two 180 degrees later. On an EFI v-8 it would batch fire 4 injectors at one time. On some applications they still use batch firing as a backup on sequential fuel injection when the cam sensor signal is lost.
We had an Aerostar in the shop that lost its cam signal and you could actually hear the difference between batch firing and sequential firing.
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 Feb 13, 2012, 6:00 PM)
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ron_schaadt
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Feb 13, 2012, 8:10 PM
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Re: 1988 toyota camry
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i still dont know which wire it was that fixed the problem but if i had to guess i would say it is the o2 sensor wire giving false signal to the ecu
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ron_schaadt
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Feb 15, 2012, 3:46 PM
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Re: 1988 toyota camry
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ok i have a couple of questions it ran then we shut it down to get the oil changed due to fuel soaked oil from running past rings when it flooded then would not start again my questions are.
( 1 ) car had the high resistance injectors in it then the replacement ones we put it were low resistance injectors the ones it had were
14 ohms the replacements are 2ohms my theory is the reason it is flooding is low resistance injectors are getting more power causing them to spray more and stay on longer do you think this is true
(2 ) question two is simple the plugs have been fuel soaked multiple times then we blew them dry with air gun do you suggest that i replace with new even if they are still sparking a good whit spark and jumping straight across
(3 ) and finally will a bad cts cause this flooding problem have been told not to always believe the ohms test it test good according to the ohms test
then today had something strange go on had a junk yard computer for the car that it has ran with in the past today fried a diode smells bad put original back in with no issues seems to be working have put a i cant think of the name of the test light for testing power for injectors but we put one on the injector connectors and all are firing im thinking if i go get the higher ohms injectors it would lower the amount of fuel going into the cylinders and stop the flooding issue do you agree
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ron_schaadt
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Feb 15, 2012, 4:25 PM
Post #16 of 42
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Re: 1988 toyota camry
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we were not aware of the injector issue due to all of the web sites i looked in did not mention that there were two types of injectors and so we just got some from an junk yard 1988 camry not knowing we needed high resistance injectors then after researching the net for answers i noticed an page about two types of injectors then after reading it we found out that there is a resister on the fire wall for the low ohms one i looked and did not have it put two and two together and figured out we had a problem now going to get a set of high ohms to put into the car and see if it resolves the flooding issue
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Hammer Time
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Feb 15, 2012, 4:32 PM
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Re: 1988 toyota camry
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I don't know what you're reading about the different available injectors. I just looked up the resistance spec and the only spec listed for that vehicle is 1.61 ohm.
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ron_schaadt
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Feb 15, 2012, 4:35 PM
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Re: 1988 toyota camry
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ok the car had 14 ohms in it and the replacement ones i got tested at 2 ohms also would the cts cause the injectors to dump more fuel than normal giving cold signal to the computer
(This post was edited by ron_schaadt on Feb 15, 2012, 4:38 PM)
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Discretesignals
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Feb 15, 2012, 4:40 PM
Post #19 of 42
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Re: 1988 toyota camry
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The factory spec. resistance for the injectors themselves are approximately 1.6 ohms. They are low resistance injectors. Your set up don't use an external resistor, so the ECU injector drivers are the current controlling type. You need to use the correct injectors for that application.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Discretesignals
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Feb 15, 2012, 4:43 PM
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Re: 1988 toyota camry
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This is what the resistance of the coolant temp sensor should be at different temps.
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 Feb 15, 2012, 4:44 PM)
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Hammer Time
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Feb 15, 2012, 4:44 PM
Post #21 of 42
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Re: 1988 toyota camry
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Yes, the CTS reading too cold will cause an over rich mixture, .....among many other things.
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Discretesignals
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Feb 15, 2012, 4:49 PM
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Re: 1988 toyota camry
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Make sure your cold start injector isn't turned on. The CSI is not controlled by the ECU. The CSI uses a time switch. Most people unplug them if they live in a warm climate.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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ron_schaadt
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Feb 15, 2012, 4:59 PM
Post #24 of 42
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Re: 1988 toyota camry
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ok so i will pick a new cts and the right injectors right now it is dumping so much fuel when you turn the key it tries to start but floods out within 3 sec of cranking
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Hammer Time
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Feb 15, 2012, 5:02 PM
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Re: 1988 toyota camry
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I was under the impression that you already had the low resistance injectors.
I seriously doubt they are flooding the engine like that. The pulse width is still controlled by the PCM. I would look to make sure you don't have a short to ground on the injector trigger or a leaking regulator.
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