1985 Other Chevrolet Models Rough Idle

Tiny
MAGPIEMINI
  • MEMBER
  • 1985 CHEVROLET
  • V8
  • 2WD
  • AUTOMATIC
  • 66,000 MILES
I have a 1985 Winnebago Chieftain with a chevy 454. When cold it idles very rough and dies unless I give it gas. The choke is closed full when cold and as it warms up the choke opens and it runs perfect, passes smog with flying colors. I have tried to open the choke flap a bit when cold but that makes it worse. Is there a screw to control the amount of throttle applied when the choke is on full?
Wednesday, April 28th, 2010 AT 5:08 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Try adjusting the initial choke opening and fast idle cam
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Wednesday, April 28th, 2010 AT 6:59 PM
Tiny
MAGPIEMINI
  • MEMBER
  • 2 POSTS
I can not find the fast idle cam, with my eyes or my fingers. From what I have read, it should be below and just forward of the electric choke. I can feel the throttle move on that side when I move the throttle on the left side but I can not find a cam or screw.

Lifting the choke plate does not help the idle so far.
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Thursday, April 29th, 2010 AT 3:39 PM

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