Question about 1986 Volkswagen Wagon Camper

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Running rich after warm up.

What I have is a 1987 Vanagon GL. It starts up fine. After I get driving (it warms up) it starts smoking. I can smell the gas. So it definetly at that point is running rich. After a while I can restart it and it will be ok for a few then back to the same issue. Any ideas what might cause this?

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These vans are now very old, and the gas lines need to be replaced!!! I can't warn you enough, if you smell gas, change the lines. There have been many vanagon fires due to fuel line failure. Replacment kits can be found on-line, it isn't hard to do. The other issues can be related to the fuel tank itself, the seals on top go bad and need to be replace. You know if you have this problem when you fill it to the top and gas leaks.

But, if you haven't changed your fuel lines... do it right away.

Also, go to vanagon.com and look up fuel line and fire... you will see lots of posts!

I've owned my 84 Westy since 87 and changed the lines 5 years ago, many were cracked and leaking. I count my blessings that I didn't have a fire.

Posted on Aug 11, 2010

  • a68machine Apr 20, 2011

    I reciently had a run in with a 1987 Vanogan with a run condition after 5 mins of warm up. Check the injector resistance when van is cold versus warm. I found injector resistance to change from 16.0 ohms to an average of 108 ohms. This caused a horrible spray pattern when warm hence a black smoke condition. The van I worked on responded well to pinching the fuel return line after the regulator, causing the fuel pressure to spike to 90 psi which allowed the enough fuel to smooth out the running of the motor. Hope this helped you and others out. If so , look up my shop up on Facebook - Escondido German Auto and hit the like button. Thanks

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When started cold and engines warming up the gas smoke and smell gas fumes


which engine, and year?
the engine is running way rich,
black smoke is very very rich .
its sick. get it serviced now.
lots of cause. do you want to do test or ask the blind for guessing.
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The EFI engine can go rich for many reasons.
there are tests for each.
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Hi there:
Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.

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I have a 92 blazer 4.3 vortec


Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.

How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found.

Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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