STUMPED!!!!! NEED HELP

Started by stocks12 · Mar 31, 2015 · 7postsSMF 2010–26

stocks12Mar 31, 2015, 7:14 pm · #1

:glarestraight: :glarestraight:

go to crank the car,
it cranks but doesnt fire,
do this a couple times still nothing,
wait a minute or two try again,
randomly starts up and runs fine,
no codes thrown either i just took apart the footwell area to get to the ecu

now if i let the fuel pump prime all the way until i hear it shut off on a cold start it will either run fine no misfires nothing, or die out and then symptoms above occur.

i am completely stumped so i gary(wondering), he said maybe CAS.... any other thoughts? any help would be much appreciated.

1988 SEV6

rednucleusMar 31, 2015, 9:34 pm · #2

how long does it take for the pump to prime? Sounds like a fuel problem to me.

stocks12Mar 31, 2015, 10:15 pm · #3

couple seconds, then it shuts off until i start the car

mcApr 1, 2015, 5:04 am · #4

...check and clean every connection on the battery

stocks12Apr 1, 2015, 10:19 pm · #5

ordering parts today,

cant figure out if its the ICM,coil or crank position sensor.. starts when weather is below freezing fine, but then when its warm it acts up. old cars !! :evillaugh:

tapped the coil with a screwdriver, started right up like nothing was wrong >.<
also going to replace the fuel injection pressure regulator, disconnected mine and idle didnt change at all

already have plugs/wires/rotor/cap
timing belt
water pump
ect ready to go in.

i wanna get this VG going properly again

WonderingravenApr 1, 2015, 11:19 pm · #6

I hate troubleshooting stuff like this, this is why I went PWR-2, MSD Blaster 2 coil, next is MSD 6L-2 Box.

There is soo much that can be causing it,

Could be the ICM, ECU, Injectors, CAS, whole Dizzy unit, Ignitor uses PWR-0 I believe. Could be timing, IACV, vaccum leak.
When I had my no fire issue it was the CAS the whole damn time, as it "blew" up inside the dizzy. I had 2 faulty ones from Vatozone from then. But now working just fine.
Not saying it is yours though, no code was thrown when the CAS was causing problems.

I would start with the cheapest, and move up from there including the CAS. ICM save for one of the last item to change as a replacement unity might be hard to come by and I don't recall them going bad often.
http://club-s12.org/retro4/index.php?topic=36001.0 is a good write up, I can see if I can get a pwr-2 at the junk yard with the pig tail this weekend.

Blaster coil 2 I forgot which one to use, check my build thread I think I have it there maybe.

Cajun1guyApr 2, 2015, 9:20 pm · #7

Replace the fuel filter as well, cheap insurance if it's been awhile.