On my 964 ,Engine cuts , need help

[krustydmc]

On my 1990 C4 , the engine cuts on acceleration, but do not stall , it's sporadic but when it's cuts ,i almost hit the dashboard with my knees . Because it's sporadic , i have hard time to find the problem, any idea? Thanks

[964TargaC2]

Try another dme relay

Might be fuel Pump

Try top run techron through a tank of gas.

The possibilities are endless without more info

[TMc993]

It could be the DME relay or fuel pump, but fuel starvation, even when the DME relay or fuel pump is failing, is usually accompanied by sputtering, popping etc, not a sudden and complete loss of power (Cutting out).

If it is a sudden and complete loss of power, even if for just an instant, it is more likely to be ignition related. I'd see if I could induce the "cutting out" by wiggling the ignition key and ignition switch while the engine is running.

Then, depending on the age/condition of the battery ground cable, I would replace it, particularly if it is the original. I'd polish the battery posts and cable clamps, make sure they are tight and make sure the battery is bolted down tightly.

It's going to take some time and a lot of patience.