sporadic misfires at 3000 RPM 70 MPH

10

Asked by Gabriel 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

GuruV2F9B answered 5 years ago

Check for vacuum leaks in the FI system. Make a smoke machine if needed. easy to make with parts from Home Depot. Get new hoses and clamps. Maybe you should clean all your ground connections too. VW Vortex guys have the exact locations in an FAQ

Mark helpful

Your Answer:

sporadic misfires at 3000 RPM 70 MPH 1 Answer

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 ...

1985 Volkswagen Cabriolet Base

-

Maintenance & Repair
my cabriolet is strange. I runs great most of the time. Once in a while while driving the rpms fall below 10k and the car bogs down. It take about 45 seconds to get to 45 mph from a stop. When this happens I drive home and park the car. Upon the next start up everything is working fine. I have a new fuel filter, plugs air filter,wires, no vaccum leaks. Your thoughts on whast I could check next? Thank you 2 Answers

The car runs fine most of the time. On occassion the rpms drop below 10k and the car bogs down. It takes about 45 seconds to get up to 45 mph from a stop, I park the car in the garage and drive it aga...

1989 Volkswagen Cabriolet

-

Maintenance & Repair
hi I have vw car when I start engine everything is ok after 30 minutes driving the engine gets very hot cames smoke from engine and the oil pressure light on at idel stat and when I drive it the engine lose piwer at last it will stop 3 Answers

hi I have vw car when I start engine everything is ok after 30 minutes driving the engine gets very hot cames smoke from engine and the oil pressure light on at idel stat and when I drive it the engi...

Volkswagen Cabriolet

-

Maintenance & Repair
3500 rpm and 70 mph ...chokes a bit 1 Answer

My car has low 30k miles. When accelerating or pushed hard on the hwy sometimes chokes a bit looses power and then back to normal . Everything else is perfect.

1985 Volkswagen Cabriolet

-

Maintenance & Repair
1988 VW Cabriolet, after engine hot will run rough and die when acclerating 11 Answers

When engine cold I can rev to 5000 rpm and upshift and the engine will kee pulling. When hot when I rev to 5000 rpm and shift the engine dies and after a few seconds will start to run again. If the ca...

1988 Volkswagen Cabriolet

-

Maintenance & Repair

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. Content will be removed if CarGurus becomes aware that it violates our policies.