sporadic misfires at 3000 RPM 70 MPH

Asked by May 25, 2017 at 07:05 PM about the 1985 Volkswagen Cabriolet Base

Question type: Maintenance & Repair

Hi!  Car is mint 33K miles and all great /timing/idle/acceleration..etc etc
car is used lightly every week.   however when I drive it on highway at high speed  - it intermittently misfires/looses rpm power and recovers after a second or two.  drove 100 miles at 70mph /3000 rpm and had it sporadically losing power / rpms and recovering after a second or two  at least 15 times. ...car is well maintained/new correct plugs,cables etc etc.   all advice is appreciatted

1 Answer

100,475

Have you checked the fuse box for corroded terminals? You may also need to have the pulse signals checked for noise on a lab scope, sometimes the pickup coils can be erratic.

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