Question about 1990 Volkswagen Cabriolet

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Ideling problem 1990 vw cabriolet

Hard to start, wont idle until warm

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Instrument cluster wiring 1989-1990 vw cabriolet

Not sure what the other wires go to, maybe the air bag, regardless all instruments are working on the '89.

Posted on Aug 02, 2008

Deutsche
  • 17 Answers

SOURCE: 1991 VW Cabriolet runs rough during idle

Check the hose between the inletmanifold and the pipe to the brakeservo it normally gets old and a crack in so the engine sucks false air on cylinder 4, causing engine to run rough or uneven.

Posted on Apr 14, 2009

greg_margo
  • 1959 Answers

SOURCE: engine shakes and hesitate when started until it idles down

Sounds like its missing on 1 or more cylinders. A check of the plugs and wires is in order, Could be a fouled plug or a loose/bad sparkplug wire. Best of luck.
Greg

Posted on May 21, 2009

emissionwiz
  • 75814 Answers

SOURCE: i have a 1990 vw vanagon it will shut off when at

Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Jun 13, 2009

  • 1 Answer

SOURCE: 89 vw cabriolet oil light comes on....

i put 20w-50 peenzoil in my cabby and helped a lot. every so often it might do it. but i did just find a vacuum leak that goes from the intake tube to the valve cover. i think if i fix that, it should be solved fully.

Posted on Jul 24, 2009

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1990 vw cabriolet. Thanks guys for the suggestions to my problem but tried it all but still wont start. Both pumps are working, new pressure regulator. It started yesterday but I cranked the engine for a...


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sounds real easy either a bad idle air control solenoid or more likley a blown throttle body gasket. to test fro a blown gasket, with engine running and cool spray carb cleaner or brake cleaner around base of tb were it bolts to intake. when it hits the bad area, should idle down and be normal for a second or 2. iac is possible,try this first since its so common and let me know

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Check for vacuum leaks. Also try cleaning the ISV.


If that doesnt work go to vwvortex.com and post your issue there

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