Hello. I have a 92 Camaro, that has been sitting since 4 of 04, or longer, but that was the last time it was legally registered. It has a no start condition, and found that the fuel pump wasnt coming on. I replaced the fuel pump, and can hear it come on, and I have fuel at the throttle body. Still no start. I then checked for injector pulse, and have none. I was told that this car ran and drove when it was parked. Ive considered that it could be the pass key, so Im going to stop by my local radio shack and pick of a resistor and try to bypass the bypass. Is there anything else it could be? Any usable input would greatly be appreciated. Thanks -Bill

'k4u

Check and see if you have spark during cranking. If you have no spark chances are that either reluctor coil or ICM inside dizzy have gone bad.
If either one is bad ECM will not see DRP pulses and will never fire injectors.

//RF

i do have spark, it will run all day providing i add fuel at the throttle body. The only thing im lacking is injector pulse.

Check the fuse(s) that power the injectors.
You should have 12 V on both sides of the injector with key on.
The ECM grounds the injector to fire them so power will be on both sides until fired.

Yes, both fuses have 12v on both side with the key in the on position. Im leaning towards the theft deterent system, as its the only thing I can find that withholds injector pulse....this is wearing on my nerves though, thats for sure

You should have 12volts on both sides of the injectors, reread above

i have the same problem .. no pulse i dont hear my fuel pump relay tho
will that allso control my pulse ?

Sounds like the ignition module under the distributor cap.

Been a while since I messed with this but if it is the key resistor VATS, I believe the Vats knows what the resistor value is.. I believe the resistor values are different for each. Do you know what resistance to shoot for? Heres a good thread with the resistor values used. My memory is telling me that if it is a VATS problem it won't even crank but i could be wrong...Secuity light would be on also I believe.

http://www.thirdgen.org/techboard/el...light=resistor (VATS Problem?)

if the link doesn't work just use search and "resistor". Title is VATS PROBLEM.

i can almost promise you it is the vats system. i had this problem when i put a 91 corvette into my fiero. i got a chip burned with the vats taken off from pcmforless for $100 and it fixed the problem.

I just worked through the vat issue on my 89 iroc, it would not crank over till I bypassed the vat with a resistor.

i too have an 89 IROC, i am having the same trouble, i have fire to the plug, fuel pump is primed and at rail, i have a resister bypass on the column. but no injector pulse...i tested to make sure the resister was correct by taking it off then attempting to fire, pump didnt come on and it wouldnt turn over, so its not the vats right???? how could the vats not work but tell the fuel pump to turn on and turn the engine over???? im at a loss...

check tps voltage.anything over about 4v cranking.....clear flood mode ...no pulse

Checked tps, c wire (gray) over 4v so what does this mean, what do I to fix whatever prob this is??? Please help, they are all over 4v if u check different way...?? Please help

the majority of no start conditions are ICM related, at least in my opinion... ...

i believe "b" is the signal wire if thats over 4 volts then you have an issue w/tps.just unplug tps and see if you get pulse.if you do tps is bad.if not probably is bad ign. control module.but since your getting spark more than likely ecm is getting rpm signal from icm.

also is this atbi or tpi car?how are you testing for pulse?shorted injector windings can shut down inj. drivers in ecm.does the cel work?

My prob is that my blue and gray wires are crossed in the harness somewhere! Lol, the simplest things are sometimes the worst problems....

i have the same problem with a 91 z28 i have.its been in storage since around 2000. last year i tried to get it running with no luck.with all the gm diagrams i started trouble shouting.it seems to me crousion is the biggest problem. my fuel pump wouldnt kick in,replaced it and it got me fuel presure.still no go.checked all computer wiring, all seem good.the injectors wount fire.the computer needs a pluse from the distributor to fire the injectors.the pickup coil generates the pluse as the engine turns.this seemed to be my problem.