Engine surge and high idle

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JonnyHen
Posts: 11
Joined: Fri Jan 25, 2013 12:55 pm
What year is your cabby?: 1992
Do you own a Cabriolet?: Yes
Location: Pottstown, PA

Engine surge and high idle

Post by JonnyHen »

Please apologize for me igorance again, being a noob with wcvw's, i have another question that i couldnt find and answer to in the forum. Finally got the little girl running again and seem to have another issue now. i seem to have intermittant engine surge/hunting and intermittant high idle (1500 RPM). both of these conditions seem to happen only when the AT is in park or neutral and both are intermittant. after installing new plugs, wires, cap and rotor, the idle did change from about 700 rpm to almost 1000 when in gear but stopped. is there some sort of idle control screw or valve that could be out of adjustment, or should i check for vacuum leak first?
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Briano1234
Whats that smell?
Posts: 4105
Joined: Mon Mar 21, 2005 5:45 am
What year is your cabby?: 1992
Do you own a Cabriolet?: No
Location: Duluth, Ga
Contact:

Re: Engine surge and high idle

Post by Briano1234 »

Replace all your vacuum hoses.
Replace the o-ring on the throttle bypass screw (7mm on the back of the throttle body brass).
Year of cabby would be nice to know.
Briano

Yes as matter of fact, I have the Luck o'the Irish...everything I touch turns to fertilizer of the bovine variety.
You can lead a user to a link, but you can't make him Click.... :screwy:
JonnyHen
Posts: 11
Joined: Fri Jan 25, 2013 12:55 pm
What year is your cabby?: 1992
Do you own a Cabriolet?: Yes
Location: Pottstown, PA

Re: Engine surge and high idle

Post by JonnyHen »

sorry i forgot the year, its a 92.
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Briano1234
Whats that smell?
Posts: 4105
Joined: Mon Mar 21, 2005 5:45 am
What year is your cabby?: 1992
Do you own a Cabriolet?: No
Location: Duluth, Ga
Contact:

Re: Engine surge and high idle

Post by Briano1234 »

JonnyHen wrote:sorry i forgot the year, its a 92.
Vacuum hoses for sure, then there is the BLUE CTS sensor.... But first change the vacuum hoses and o-ring on the throttle body by-pass screw.
Check the Main Air intake tube, here is a link, as that hose gets week, and any unmetered air plays havoc.

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Briano

Yes as matter of fact, I have the Luck o'the Irish...everything I touch turns to fertilizer of the bovine variety.
You can lead a user to a link, but you can't make him Click.... :screwy:
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