car was runing fine then parked it. around 2 mothuns later tryed to start it ran ok. parked it went to start it a week or so later want crank with out holding gas to floor then runs rouff lots of black smoke drove car around 8 miles then turned it off never to start agin it will run for 3 to 5 sec. every 30 or so trys. have cked evrey thing I can think of igntion module, map seinser,egr, pluges wires cap rotery button , coil fule pump, fule presere, timming, intake, belts, battery, alt.(both load tested also) fule rail preser 42 psi. can't find any thing else to ck car still want run at all. need some ideas!!

Have you ran the car for codes?

What year car and what engine?

Check everything that has to do with the car getting Air, Fuel, Spark, and compression.

year 91 305 tpi auto I think I have a bad ground some where I have found the spark to be incifficant to start the car. ground problums seems to be at the starter. best I can tell

change the coil.

also yes I ran the codes. codes where systom reply code 1 code 2 was o2 sensor from exhaust leak I would think and that all the codes

coil was replaced no change

did you check the ICM?

did change the ingnition module still nothing

if i did all that and still no start, i'd be taking the timing cover off to see if the chain broke or something.

checked the timing by using a plug wire and feeling for the comprestion stroke . looked to be ok spark is just brown and weak only thing that has mad a difference is regrounding the battery it started 4 times and ran for 5 sec. each time

You need an electrician...
Change the computer

SO the car cranks but will not fire? AND you figured out that the spark is too weak to start the car... but I noticed that you replaced damn near everything dealing with spark. Damn I am stumped...

to day I, regrounded the car to see if that helps .it did a little better. I just got a a new computer to try but would like to know where i can get a copy of the wiring layout for the cars computer to make sure all connectores are ok be for pluging new computrer in to see what happones. the old plug has so wires on the yellow plug side that I dont want to trust till I can ck them.

*fills in for John* Haynes Manual 20$ and its your best friend

got one dosen't show wireing or vac hose layout

actually it all sounds like the ignition module died
if not theres a bad ground somewhere

found problum need to know the way to bypass the entire vats systom!!!!!

if the VATS was the problem, the car wouldn't even crank, let alone run for a few seconds like you stated earlier.

it is only the injector side of the vats

also I ck the ignition module put a new one on first thing

my camaro rs would not start , at first it would after trying over and over, eventualy it wouldn't start at all.
I took the car to a mechanic they charged me a bunch of money replaced the computer, the fuel injectors, all kinds of bullshit
that worked for a couple days. then i had the same problem. I found this web site and after looking through thousands of these
discussions, some body told me to check the chip in the key to see if it was connecting, and it wasn't, so I was told to take a diode
that measured the same amount of OHMS as the chip in the key, and connect it to two wires in an orange sleve at the bottom of the
steering column. which would connect the two and compllete a circuit. which worked for a while but one day the car died and still
will not startso i am still looking for answers.


but it did work for a while here's how I did it
1. I took the chip out of the key
2. connect one of the wires in the sleve to each side (be creative)
but.... do not harm the chip....
THE CAR STARTED RIGHT UP
CHECK V.A.T.S, PASS KEY DECODER MODULE

my camaro rs would not start , at first it would after trying over and over, eventualy it wouldn't start at all.
I took the car to a mechanic they charged me a bunch of money replaced the computer, the fuel injectors, all kinds of bullshit
that worked for a couple days. then i had the same problem. I found this web site and after looking through thousands of these
discussions, some body told me to check the chip in the key to see if it was connecting, and it wasn't, so I was told to take a diode
that measured the same amount of OHMS as the chip in the key, and connect it to two wires in an orange sleve at the bottom of the
steering column. which would connect the two and compllete a circuit. which worked for a while but one day the car died and still
will not startso i am still looking for answers.


but it did work for a while here's how I did it
1. I took the chip out of the key
2. connect one of the wires in the sleve to each side (be creative)
but.... do not harm the chip....
THE CAR STARTED RIGHT UP
CHECK V.A.T.S, PASS KEY DECODER MODULE