Engine Cutting Out Again, Severe Miss Options

[PDXBob]

Hi 914’ers,
This is a revival of my old post about the same engine cutting out problem on my 1975 914 (1.8L). It cuts out generally after warmed up and driven for a while. Usually happens under load, like when I’m going up a hill. Doesn’t miss on idle or when I rev it up in the driveway. Based on the work I’ve done so far I’m now thinking must be fuel related.

Here’s an (unfortunately) long list of what I’ve checked or replaced:
- new Spark Plugs and wires,
- new 123Ignition distributor, coil and distributor cap
- no vacuum leaks, all ground wires appear in contact and good shape.
- ECM wiring appears good and I’ve tried wiggling its wires to see if any faults
- Tested the TPS and it’s good, also AFM flap moves smoothly.

A couple of other interesting things- I didn’t drive it for about 2 months, and after installing new distributor it ran great for about 2 weeks. Also, on Friday it was cutting out bad, then I stopped at a store for about 1/2 hour and when I restarted and drove home the cut out had disappeared.

So, I’m now think fuel system related.
Any ideas would be greatly appreciated!
PDXBob

[GregAmy]

Similar. Even had to have it towed home once.

It was the round relays, specifically probably the one for the fuel pump.

My resolution was to remove all of the relays and take a razor blade and GENTLY pry the male quarter-split pins apart just a tad, to get better contact within the pin holes. You can feel how they sit tighter in the plate now. Small pipe cleaner to clean out any corrosion in the female pins. Added some dielectric grease and it's been perfect since.

I eventually replaced all the relays with 914 Rubber versions. If you go that way I do still recommend cleaning the female pins and some dielectric.

https://914rubber.com/black-5-pin-multi-pur...lectrical-relay