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a
This may have been covered before on this registry. My '86 Coupe began "surging" particularly at lower speeds (35-50mph) with the cruise on. I discovered that the cable going from the cruise servo to the throttle had stretched a little in the 25 years I have owned the car. It just required a tightening of the cable. It is described in the Haynes or shop manuals.
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
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#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Did that correct the surging issue?
Joel Adams
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a
Yes. I posted it because I wanted to save C4 owners the trouble of going to a repair shop for a simple fix.
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Send PMLanoka Harbor, NJ - USA
Joined: 12/21/2006
Posts: 2191
Vette(s): 1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c
thanks for the tip. mine was doing it from a vacuum leak. glad it's fixed.
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a
Adjusting the cable solved most of the surging problem, but I still noticed it at certain speeds. I don't recall that it did it when new. You mentioned that you had a vacuum leak. Could you tell me where exactly the leak was? I would like to do some further checking.
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Send PMLanoka Harbor, NJ - USA
Joined: 12/21/2006
Posts: 2191
Vette(s): 1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c
the previous owner taped up the vacuum hose on the right side of engine that goes from the throttle body to the valve cover. i found it by accident. the cruise control will vary the speed usually within a mile of set speed. if it is a little bit that maybe normal. as far as a vacuum leak, check all your vacuum hoses. could be they need to be replaced.
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in Forum: C4 General Discussion
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