90 iroc (help)

[tom bezaire]

hi i got a 90 iroc z camaro 305 been trying to fix for a while now car will start from time to time. when it starts u can not give it gas or she stalls write away original problem was driven down the street and all of a sudden when u tryed to give it gas she would cut out until she finally came to a dead stop still ran no throttle...At first it would start no problem idle smooth but would not let u give it gas. i put new plugs wires cap rotor ignition module tested plug wires for spark and it sparks wondering how to properly test the injectors , throttle postion sensor and idle control valve car only has 100000km its stored in winter also put new o2 sensor and fuel filter. i got a multimeter with oms reading do you check the wiring or the actual part with the key on car not running. Please help Tom

[97cavalier]

sounds like fuel pump, check fuel preshure.

[tom bezaire]

no tester would you just press the fuel valve on fuel rail to see if fuel comes out

[tom bezaire]

Originally Posted by tom bezaire

no tester would you just press the fuel valve on fuel rail to see if fuel comes out

if so does it make a mess and shoukd i remove the map sensor

[97cavalier]

just go and buy a gauge, good invesment. And if you just let the fuel come out of the rail, that is not going to tell you how much fuel pershure is there, it will just tell you that it is getting gas.

[AFI 05]

maybe your fuel pressure regulator... should try replacing that.

[tom bezaire]

today tried new coil no diff also got a pressure tester and it reads 42lbs still stumped tried my oms meter to read injectors and 2 are under 11. 1 is 8.6 and 2.6 not sure if tested correct tested injector ( touched 2 prongs) then tested for currnt in the wires and it light up the test light. trying to test my throttle postion sensor in volt in manual it says .60 to .95 volts if anyone has tested please advise thanks

[tom bezaire]

Originally Posted by tom bezaire

today tried new coil no diff also got a pressure tester and it reads 42lbs still stumped tried my oms meter to read injectors and 2 are under 11. 1 is 8.6 and 2.6 not sure if tested correct tested injector ( touched 2 prongs) then tested for currnt in the wires and it light up the test light. trying to test my throttle postion sensor in volt in manual it says .60 to .95 volts if anyone has tested please advise thanks

could it be the altenator

[tom bezaire]

how to test with a volt meter or oms reader does car have to be running wiring that leads to altenator has 12.3 volts no reading from lower 2 prongs with key on car not running, i had it on 20v and 200 v tried even oms 200 red one bottom prong black on 2nd help thanks iroc are hot lot of nice one shown.

[97cavalier]

sounds like bad fuel injector. Auto zone checks alternators and batterys

[MurphyIsmyName]

I have a 1990 Iroc and my car was doing similar stuff. By the time I got it, it would only try to start, wouldnt even start completely. Yesterday I took off the injectors and They were so full of crap that the bottom of them were completely dry. Every one I checked was like that. If you are getting correct resistance from the Injectors, and if you have 42 lbs of pressure to the fuel rail, then the only other thing that could be wrong besides the Injectors being bad I would think would be the pulse to the injectors. If you have the pulse, seen with a noid light, then I would start pulling injectors and looking at that part. Good luck in finding your problem.

[tom bezaire]

Originally Posted by MurphyIsmyName

I have a 1990 Iroc and my car was doing similar stuff. By the time I got it, it would only try to start, wouldnt even start completely. Yesterday I took off the injectors and They were so full of crap that the bottom of them were completely dry. Every one I checked was like that. If you are getting correct resistance from the Injectors, and if you have 42 lbs of pressure to the fuel rail, then the only other thing that could be wrong besides the Injectors being bad I would think would be the pulse to the injectors. If you have the pulse, seen with a noid light, then I would start pulling injectors and looking at that part. Good luck in finding your problem.

unplugged altenator and car ran smooth it let me give it gas before it died i put a complete flow master exhaust system sounds great is your car up and running please advise tom

[AFI 05]

Originally Posted by tom bezaire

unplugged altenator and car ran smooth it let me give it gas before it died i put a complete flow master exhaust system sounds great is your car up and running please advise tom

yeah my car had a similar problem.. unplugged the alternator and the car wouldnt die on me.. it happened to be a short circuit in the thick pink wire.. it killed 2 alternators until it was fixed.