1991 grand prix se coupe 3.4 wont start

[trailerparkcustoms]

i have a 91 that cranks and cranks but wont start i spray a lil starting fluid into intake it will start run down tha road a little bit then back fire and die ive replaced fuel filter and pump and the ignition control module it has good spark at all plugs and has fuel up to fuel rail between 40-45 psi i have tried everything else i no and nothing im up for just about anything now

[vamc]

Maybe a bad fues that controles the fuel pump.Bad ecu. Crank sencer.o2 sencers. thoes are my thoughts.

[trailerparkcustoms]

its not tha sensors and ive already replaced all tha fuses and relays but thanks for tha reply

[vamc]

not a problem

[unclejohnny_69]

Have you checked the injectors?

[richtazz]

have you checked the fuel pressure and for spark when it dies?

[trailerparkcustoms]

as of right now i have tha car checked up to the injectors and fuel rail it has great pressure at all points in time and the spark is perfect it even has good pulse im thinkin either tha rail or the injectors are cloged but thats were im at thanks for tha replies this shit sucks

[tblake]

Have you done a compression test on it to make sure that a camshaft hasnt skipped a cog? Lets start with the basics first before we go and replace any more parts.

[trailerparkcustoms]

if u read up at tha first post tha car will start and run on ether so as for is skipping or the crank cam sensors timing setup and anything else that would not let it run thats out it will start and run on ether im at tha point im thinking tha icm i replaced went bad again or i just bought a bad on or i have a bare wire somewhere thats shorten it out

[eippermx]

Taking a shot in the dark here...
Did you try the easy stuff?
Disconnect the MAF and see if it fires up?
The MAP?
The IAT?
Did you check your engine ground and make sure its tight?
I don't see where you mentioned if the SES light is on or commented whether you have used an OBD I scanner on the car.
I'm musing here, I wonder if the O2 sensor is bad. If the car can fire up and as soon as you get going and it goes into closed loop and starts to use the 02 sensor it makes me wonder if that may be part of the problem? Has it ever been replaced?

[richtazz]

If it starts and runs on ether, then it's a fuel supply problem, not spark related. You say that you have good fuel at the rail, what is the key/on engine off pressure reading? Just because there is pressure present, doesn't mean it's sufficient to fire the injectors. If the fuel pressure is in spec, then I would suspect the injectors.

[trailerparkcustoms]

yea i did scan it it keeps givin me code 12 wich is just that ur jumpin terminals in tha computer cuz im ghetto and just used a paper clip but other than that specs wit key on eng off is between like 37 to 43 its at steady 41 i did mention i replaced tha icm but i was told the other day that if tha module went because of a bad spot in tha wiring to it then tha new one would be bad again already it was doin this same thing before when it went bad so im thinkin im gonna pull it again and take it and have it tested maybe throw a new one in again and see if it fucks it up againbut other than that sounds like tha best idea yet so thank u guys for replying or girls dont want to be sexist and ill keep tryin this fun shit

[trailerparkcustoms]

so i broke down and tore it apart had tha new icm and coils checked go figure my luck they all checked out good so now im back to tha injectors i did ground tha setup better though which i was told could be it but it wont hurt regardless what tha hell why not so yea im still tryin

[trailerparkcustoms]

so im changing tha computer today hopefully that even though its pulsing maybe tha computer is pulsing at tha wrong times