Idles to fast

Asked by Apr 07, 2015 at 02:02 PM about the 1986 Volkswagen Cabriolet Base

Question type: Maintenance & Repair

Idles to fast, cuts off when in gear

5 Answers

1,405

You need to check for vacuum leaks; disconnected or frayed hoses or plastic tees, etc. Vacuum leaks will allow the idle to be too high, and the CIS-E fuel injection system depends on good engine vacuum to operate properly.

150

1979 to 1988 Cabriolets are CIS fuel injected. NOT CIS-e. Generally look for vacuum leaks, but I suggest replacing the O-Ring on the idle adjust screw located on the rear of the throttle body assembly.

3 of 3 people found this helpful.

Thank you....my brother did find 2 vacumn leaks which improved the idle, but still cutting off after running for a few minutes. Someone says it may be the fuel flow sensor. Any feedback on that would be appreciated. We are not too familiar with foriegn autos and I will most likely end up selling, but want to fix the problem first.

I also heard it could be the fuel pump and read where it has 2 fuel pumps and can be removed through the floorboard under the back seat! Help...

150

The main fuel pump is underneath the car. Located just forward of the rear right wheel. The fuel transfer pump is in the fuel tank, and can be accessed from under the rear seat. If you go to http//www.toplessrabbit.com you will find both help and how to advice. The fuel pump in the tank would be my next choice for the stalling out issue.

Best Answer

Your Answer

Add photo

Related Questions

  • Idles to fast 5 answers

    Idles to fast, cuts off when in gear

    1986 Volkswagen Cabriolet Base

    -

    Maintenance & Repair

  • engine idles fast then slow fast then slow, Plugs turn suty black 2 answers

    Enine runs fast an steady for a few seconds, then runs rough for a few seconds, back and forth. Then after a minute or cuts off. I pull the plugs and they are sutt black, put clean plugs in and it s...

    1992 Volkswagen Cabriolet

    -

    Maintenance & Repair

  • how to get the oil pressure light to go off inside the car 1997 vw cabrio

    how do I get the oil pressure light to go off inside the car. I've changed both sensors and check the oil and its a lil over but not much. how do I fix the problem.

    Volkswagen Cabriolet

    -

    Maintenance & Repair

  • No Spark to PLugs 2 answers

    Please help. When I turn the key on I get one quick spark from the ignition coil to the distributor but nothing after that. Same thing when I check the spark at the plugs. I replaced the coil last ...

    1992 Volkswagen Cabriolet Wolfsburg Classic

    -

    Maintenance & Repair

  • Idles rough, alternator vibrates, give it some gas and it stalls 3 answers

    Just changed battery and alternator on it because of the same symptoms, however the car did run prior to the new items. Idles fine but rough shaking of alternator, (old alternator was grinding insi...

    1993 Volkswagen Cabriolet Classic

    -

    Maintenance & Repair

Cabriolet

Looking for a Used Cabriolet in your area?

CarGurus has 8 nationwide Cabriolet listings and the tools to find you a great deal.

ZIP:

Search Volkswagen Cabriolet Questions

Volkswagen Cabriolet Experts

#1 Reelin68
Reelin68
Reputation 260
#2 Scott Sr.
Scott Sr.
Reputation 230
#3 tenspeed
tenspeed
Reputation 220
View All

Related Models For Sale

Used Jeep Wrangler
260 Great Deals out of 16,543 listings starting at $2,590
Used Honda Civic
814 Great Deals out of 88,107 listings starting at $1,299
Used Volkswagen GTI
98 Great Deals out of 7,260 listings starting at $2,400
Used BMW 3 Series
941 Great Deals out of 30,258 listings starting at $1,000
Used Honda Accord
948 Great Deals out of 77,739 listings starting at $899
Used Volkswagen Golf
57 Great Deals out of 3,635 listings starting at $1,600
Used Ford Mustang
543 Great Deals out of 45,845 listings starting at $1,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.