Question about 1986 Volkswagen Cabriolet
I have a 1986 Vw Cabriolet. The car will start with no problems - after about 15 minutes of driving the RPMs will bounce, the runs rough 20 seconds and then quits. Will crank but not start. If I wait an hour the car will start at first, but the RPMS start to bounce (Between 0 and 2000) and then promptly quit. If I wait two hours the car will start again and run for 15 minutes. The problems repeat. When the car quits running it does NOT act like it running out of gas (there is not the characteristic out of gass stutter)
Without testing anything like fuel pressure and ingnition voltages. No way to tell whats going on
It could be a fuel issue . I have seen this many times. The fact that it will not start. Tells me that its most likely a fuel issue.
Get some brake cleaner and spray some in the throttle when it doent start. If it starts and continues to stay running while spraying then you will know its a pump issue.. If no change then you will know its a electrical issue.
This is the first thing you need to do before we move on because everything else will require test equipment and wiring diagrams
You could go to the link below and buy a 12 dollar subscription and diagnose this yourself. You will have all the info a professional has and the location for all the components.
Posted on Dec 12, 2009
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Posted on Jan 02, 2017
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