Cutting Out, Bad miss- Help Needed Options

[PDXBob]

Frustrated by a Bad Miss. hope the 914World Experts can help me out!

On my 1975 914 (1.8) I have had a sporadic bad miss for the last 6 to 8 months. Here are some of the details.

- it’s been doing this for at least 6-8 months. Some days doesn’t miss at all. But today it was bucking so hard I didn’t know if I’d make it home. This was the worst it’s ever been!

- When it misses it feels like it’s bucking, that is, doesn’t feel like one cylinder miss but total cut out.

- it’s worse under a load, e.g. when going up a steep hill.

- In the driveway today I could rev it up and hold it while standing still with no miss. Didn’t matter if I held it at 2,000, 3,000 revs- didn’t miss.

- not sure if fuel or electric issue. Any tests I could do to determine?

- Does it in all gears.

- The Tac does NOT fluctuate when it cuts out.

- The lights and radio do NOT flicker or stop.


Any suggestions would be greatly appreciated. Thanks in Advance!
PDXBob

[Olympic 914]

I had a similar issue coming back from Okteenerfest.
It began during the drive while there,and continued during the drive home.
With 200+ miles to go and the missing getting worse, I started pulling plug wires and had a questionable spark on #3
Ultimately I found a Flaps and bought new spark plugs.
The ones I took out did not look THAT bad.
But have not had an issue since changing the plugs.

Might be worth a try.

Do the simple stuff first.

[nivekdodge]

I had a similar issue coming back from Okteenerfest.
It began during the drive while there,and continued during the drive home.
With 200+ miles to go and the missing getting worse, I started pulling plug wires and had a questionable spark on #3
Ultimately I found a Flaps and bought new spark plugs.
The ones I took out did not look THAT bad.
But have not had an issue since changing the plugs.

Might be worth a try.

Do the simple stuff first.

take the timing light to all the plugs, it will show the miss
Kevin