Hey, can you help.
We have a 73-914 1.7L. Under hard acceleration the engine cuts out and then we get a small back fire and the engine will catch.
If we gradually accelerate the engine performs fine but is under hard acceleration that we have a problem.
Can you possibly give us a direction to look to fix the problem.
New fuel pump, new fuel filters,, and the tank was cleaned and lines flushed 200 miles ago.
Thank for listening,

Bad FI pressure regulator.

Check your fuel filter. It's starving for fuel at wot.

Check dwell, then timing, and adjust valves too if it's been a while.

No.

This behavior is typical for missing additive injector pulses during acceleration.

The throttle-valve-switch (TPS) switches contacts when opening the throttle and sends this information to the ECU.

Check and clean this unit inside- do not oil or grease the contacts. The electrical current is very low, grease will prevent contacting.

Look at this: https://oldtimer.tips/en/d-jetronic/58-throotleswitch

Regards
Norbert

That statement says to me: Change the fuel filter.

Anytime I clean a tank, I tell the customer to plan to change the fuel filter in 500 miles.

Thanks Joe. This will be the first thing that we do. and the cheapest.

Thanks Norbert.
Fuel filters first and then the TPS rebuild.

Guess you must have missed my post.

if it cuts out at 5800 it could be you have a rev limiting rotor.