Need help ...

[DJay]

87 GN, bone stock, 58k miles

I've been trying to fix problem of car running great MOST of the time, but SOME of the time it dies while driving it.

I was spraying water under hood, to see if possible shorts existed, to see if I could replicate the problem. While doing this, the car heated up and the fan started running .... the car started running like poopoo. I let it die, let it cool off for a minute, started it back up. It ran fine. (The fan was NOT running when restarted.) After a few minutes, the fan started again, and it ran like poopoo again!?!? How could an electric fan cause a problem like this?!?!

Anyone had any like experiences?? I've replace the fuel pump (Walbro 307) / fuel filter so far to no avail. FP gauge says 42 (stock regulator). Please give me a hand on this one. The car looks so nice sitting there; makes me wanna drive it! (Go figure!) Heh heh ...

 

[galoush]

Check your volts . mabe the fan is causing to much of a drain on the elect system and its causing the ignition to die out , just a guess but easy to do. i would look al around the engine for any frayed or damaged wires , check to positive battery cable from the bat top the starter to make sure th e headers havent burned through , that one was a common one on these cars .Check to resister on the fan wiring mabe its damaged .Check out the fan relay too , its on the driver side.It couldnt hurt to get a adj. reg but i dont think thats the prob just nice for getting the f.p up and overall safety with fuel delivery. Hope you find the problem good luck .

 

[TurboJim]

Originally posted by DJay
87 GN, bone stock, 58k miles

I've been trying to fix problem of car running great MOST of the time, but SOME of the time it dies while driving it.

I was spraying water under hood, to see if possible shorts existed, to see if I could replicate the problem. While doing this, the car heated up and the fan started running .... the car started running like poopoo. I let it die, let it cool off for a minute, started it back up. It ran fine. (The fan was NOT running when restarted.) After a few minutes, the fan started again, and it ran like poopoo again!?!? How could an electric fan cause a problem like this?!?!

If your fan is blowing on the MAF, or, blowing on the filter in front of the MAF that could cause a poor run. These sensors are VERY sensative to turbulence. ESPECIALLY the new LS1 MAF's. Move the air intake from behind the cooling fan and I bet you're all fixed up