'94 945T with Bosch.

Stopped a couple of times on the way home last night and the car would start but immediately cut off unless you pressed the gas pedal, after which it ran OK.

The idle is occasionally too low when you start it also and the check engine light flickers on then goes off once you rev it slightly, again only when it's warm and intermittently. I plan on checking for codes,cleaning the throttle body and IAC valve but would be grateful for any other ideas.

Thanks

I would be inclined to suspect the TPS - throttle position sensor. My wifes came unplugged somehow and the car exhibited the same problems. Yours might be dead or unplugged, or simply misadjusted, check the faq for test proceedures.

good luck with whatever it turns out to be.

Hi! I have the exact same issue with a 93 940T, and although I haven´t tried the solutions yet, the FAQ has a detailed solution, apparently is a known issue with this model. Basically it tells you to check the in-tank pump, the FPR, fuel cap and IAC valve. I think my problem is with my IAC. Hope it helps...

JGC

It could be the check valve at the fuel line, located right between the fuel filter and main pump (in the same assembly under the car).

When the engine is hot, and the check valve is not doing it's job, it can produce a vapor lock by pushing some fuel back to the rear end. The check valve (one way valve) does not allow fuel to go backwards. This would explain why it seems like it starts (residual fuel up front), but then stalls out due to fuel starvation. If you hold the gas, the increase in fuel requirement/demand could be enough to overtake any possible vapor lock and fill up the fuel line again. This theory is also in line with the fact that this would never happen on an engine that is completely cooled down (no vapor lock).

Regarding the flickering check engine light, anything causing the engine to idle low or stall out would cause that. It could be part of the effect of the problem, not directly related to the cause. As such, the code might not be useful in this case.

The above happened to me 3 years ago, and the check valve fixed the problem 100%. My case was a 240, but likely the fuel delivery configuration is the same.

Best of luck,
Greg Mustang
Montreal, Canada

If your code reads 2-4-1 from port 6 i'ts the EGR valve.