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4K Running Rough

Featured Replies

I will chuck on twin SU's I have or maybe just one.

 

Ooooh.. chuck on both, they give years of entertainment, frustration and problem-solving exercises... and they run with more grunt than the Asian and less fuel on a trip!

  • Author

Ooooh.. chuck on both, they give years of entertainment, frustration and problem-solving exercises... and they run with more grunt than the Asian and less fuel on a trip!

 

I'm sensing sarcasm, though its hard to tell on the internet.

no sarcasm. he loves his twin su's

Not that rough on cold start, though it doesn't get cold up here. after a freeway run it is very rough. Tightened manifold bolts and changed points and it has stopped stalling, though it is running very rough. New leads next, if that doesn't fix it then I will chuck on twin SU's I have or maybe just one.

 

I changed my leads, didn't do much other than a bit of a power kick, still runs rough.

 

I know of a guaranteed fix, it goes by the name of 5K.

 

Hoping my diff, trans and motor will hold up for another 6 months or so (Can't imagine it not) But yeah, it is right strange.

 

Edit: Have you tried turning the radio up?

Edited by emptycoffin

Do a compression test, start with the basic's, if you have good compression, move on to the next thing.

 

Does it run rough at hi-speeds, or is it only when it's idling?

 

Point gap should be 14-16 thou= 49 - 54 degrees, not 46!!

  • Author

Do a compression test, start with the basic's, if you have good compression, move on to the next thing.

 

Does it run rough at hi-speeds, or is it only when it's idling?

 

Point gap should be 14-16 thou= 49 - 54 degrees, not 46!!

Will do asap. runs perfect at high speeds/rpm, just a little rough low down. tightened the rear manifold bolt today and it made it much better. Gets me thinking it is a vacuum issue, I just took a stab at the number, it is set to how the Gregory's manual states.

If you are tightening bolts and it is running better than take the manifolds off, clean them up and put on fresh gaskets + gasket silicon.

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