Car Wont Start I Need Help Bad

[phillyphil]

I have a 1995 3.4L V-6, and yes i know that is prolly the problem, lol, but i was driving the other day and all of a sudden it died, out of nowhere, i have replaced the ait sensor, the tps sensor, and ECM, checked the IAC sensor, and have 43 pounds of pressure at the injector, manufacturer specs require 41, getting spark at the plug wires, and off the coil pack, pump turns on and maintains the 43 pounds the whole time the car is in the on position, checked all the fuses and they are good, battery started out with a good charge, now is low due to cranking it over while trying to see if each thing i went through helped, ANY ONE have any ideas as to what could be the problem??? i heard possible timing

[phillyphil]

oh yeah and i wanna know because i wanna have an idea as to whats up before going to a mechanic to get it checked

[19camaro71]

If you have checked and replaces all the major sensors, it's probably internal. How are the plugs looking? If you were driving and it dies, it's not timing, something else. Like i said, if you replaced that many sensors and it still won't run, it's probably internal. If it's not something internal (it does turn over) then you aren't getting fuel or spark, but you said the pressure was consistent. I would just take it to a mechanic that i trust. It is probably ignition problems, check the wired, plugs and all other parts. Hope it helps, hope it's not internal!

[phillyphil]

thanks for the response, i have a few other ideas to check first that i got from some engine heads, like the crank position sensor, or possibly faulty electronic ignition control module, from what i hear it can still send a spark, but not comunnicate with the ecm saying its sending spark causeing it to just turn over, also heard possibly too much fuel and not enough air, gonna check all that asap, but thank you for your help, any other ideas would be appreciated

[icebrew405]

alternator

[phillyphil]

thanx again but i know its not the altenator it maintained charge with a major soundsystem in it, i run 4 12" subs and about 1600 watts of power maintained full charge and just died outta nowhere and has enough juice to crank over and over

[TEXAS-HOTROD]

You can disconnect most of the sensors and a typical Chevy will still start and run. T.P.S., m.a.p., i.a.t., c.t.s., and idle air control aren't necessary for an engine to at least start and run for a few secs.

You said it has good spark to the plugs, so that means that the crank shaft sensor and e.c.m. are working. Use a test light and check for voltage at the injectors when the key is turned on. Insert a paper clip along side the wire into the socket. I have found on a few models the injectors are wired to the fuel pump relay and power up only when the pump is engaged.

If you have power to the injectors then unplug the socket from the injector and probe it and mark the power wire. The other terminal is the trigger circut from the computer.

Connect your test light to the positive side of the battery and probe the trigger side of the injector plug. Crank the engine and see if the light flashes dimly. If it does, then you have trigger to the injector and everything to shoot fuel is ok. If it doesn't flash, then it could be an ignition module. The module not only fires the coil, it also tells the e.c.m. what injectors to fire and when.

Remove the air intake hose and shoot some carb spray cleaner into the throttle valve and see if it will start. If it does start and die, then it will be a fuel problem. You might pull a spark plug just to make sure they are not fouled from so much cranking.
Post back on what you come up with.
---TEX---

[phillyphil]

thanks a million everyone, ima check the power to the injectors, tried to test the ignition module with a test light i dont know if it was already burnt out, or if the module did it from too much power, but no flashing and the bulb is burnt, but i rigged up a 100watt bulb that show continuity and still not even a faint flashing so ima price the module just to see what it will cost me before towing to a mechanic and hooking up to a scanner and all that jazz that they rape you with, all help is greatly appreciated and i hope i can contribute to you guys as well in the future