Javier87z28

iTrader: (1)

Hello guys, im having an issue with my z28 in which it will start and idle for about 5-10 seconds then it stumbles and dies. While its idling if i press on the throttle it chokes and dies as soon as I do. I have changed the fuel filter and fuel pump, checked the tps and iac, and cant seem to notice any vacuum leaks. No codes are being thrown. Any ideas?

Javier87z28

iTrader: (1)

Also did check fuel pressure, with key on its about 45psi and stays steady once i start the car, does not drop.

Javier87z28

iTrader: (1)

And if i spray starter fluid the car will idle for longer im guessing as is finished off the fuel. Im guessing this would rule it a fuel problem

Javier87z28

iTrader: (1)

Checked the plugs last night and they are badly fouled and black, might this cause the engine to stall and not hold an idle?

Ikes 91Z

iTrader: (1)

Wouldn't hurt to clean them or get new ones depending on how old they are. Even if it isn't the issue, it's definitely not going to hurt anything.

L98GTA87

iTrader: (1)

How are your injectors?

Javier87z28

iTrader: (1)

I haven't checked them as of yet, how would I go about checking them? Also I notice the oil pressure drops as the car stumbles and dies. Might the oil pressure sending unit cause such issue?

Bob88GTA

iTrader: (2)

As the car stumbles and dies, the RPM's are less which in turn causes it to lose oil pressure.
Normal.

Check for vacuum leaks. You mention IAC/TPS is fine, may have a vacuum leak, plug wires, timing issue, cap/rotor...

Javier87z28

iTrader: (1)

Need to get a diagram for the vacuum lines. Did the plugs and wires, cap seems to be in fair condition. I will check the rotor, and the timing. What should the timing be set at?

Bob88GTA

iTrader: (2)

Timing is 6* BTDC

see this
https://www.thirdgen.org/forums/tech...iagrams-i.html

Bob88GTA

iTrader: (2)

...LB9

Javier87z28

iTrader: (1)

Thanks a bunch! I also need to check the cap and rotor havent replaced those since roughly two years give or take!