When my ke70 4k is sitting on idle, the engine every now and then (30 seconds to 1 min or so) revs itself :y:

I'm not to flash mechanically, so i had my girlfriends dad take a look. While we were watching a ticking/buzzing noise came from what he said was one of the vacuum tubes. Anyone else have any idea/had this happen before. Also when warming up the car drops to 0 revs and cuts out unless i keep it around 1000-1500 (only at initial idle/warmup, stops as soon as i drive).

 

Ps. we fiddled with my idle and made it sit on 900rpm a day or two before this happened.

 

Thanks for whatever input may come my way :)

 

Ok car sat with my mechanic friend today, all the choke-settings and mixture screw was over the place, all of that and ignition is tidied up and running shmick.

HOWEVER he said there may be need for a new carberatour, 1) is it worth getting it completely rebuilt ($200-250) OR 2) would i be better off getting a 2nd hand one from someone on here, and how much would that set me back (good condition) ORRR is there a cheap performance upgrade for this, as i will soon be running bigport 3k head, extractors and a reground cam.

 

Thanks again RC.

Edited October 14, 200916 yr by rollaspec

Didnt happen to knock off a vacuum hose from the manifold by any chance?

Does the KE70 4K have an automatic choke?

Does the KE70 4K have an automatic choke?

 

it does have a choke, but its pull-out manual, not auto. However, it's a piece of sh*t because when i've tried to use it before to warm the car up it does send my revs down to zero...that may be the problem, but i still think there is a vacuum problem. I'll check it out today or tomorrow with the old owner (he's mechanic).

Thanks :)

it does have a choke, but its pull-out manual, not auto. However, it's a piece of sh*t because when i've tried to use it before to warm the car up it does send my revs down to zero...that may be the problem, but i still think there is a vacuum problem. I'll check it out today or tomorrow with the old owner (he's mechanic).

Thanks :)

This is a bit of a question inside of a question, but: If there is a vacuum problem, I'm guessing that's why the choke wouldn't work either...?

Aircon?

it could be your alternator stopping the charge to your battery causing it to rev randomly,

could be a vacuum leak but it would be more constant, do the leak test with some lynx just incase

make sure your idle mixture screw is set properly as it dramatically changes the engine in many ways

if all that fails then check for vacuum hoses that are broken or unplugged but i doubt it would be that

Yeh i thought about mixture screw..will get that checked too. thanks

Edited October 14, 200916 yr by rollaspec

Revised original post, help a brother out :jamie: