20 Most Recent 1985 Porsche 928 Questions & Answers

Not sure, but have you checked ALL of your vacuum lines for cracks/leaks - most likely cause is an air leak in vacuum lines or fuel inlet.

What you are describing is a vacuum leak in one of the vacuum lines for the cruise control or a bad cruise control vacuum servo. I myself am a former owner of a 1979 Porsche 928 5 speed, a very beautiful and extremely powerful stock automobile. Good luck.

it is possible to purchase 1 single plug wire i guess depends on where you are. here in australia any of our car shops sell them singly and also some mechanical garages also sell them singly.

I listened the same problem with one Boxter when the battery went dead. They called the Porsche dealer and he offered a suggestion that worked great: Go to a auto part store and buy a small battery that plugs into your cigarette lighter for the purpose of starting cars when batteries are dead. Leave it plugged in for about 20 minutes and it gives you enough charge to open your hood latch. Make sure your door is open when you go to pop the latch, as they was sitting in my car with the door closed and trying to figure out why it wasnt working.

Now they always keep one charged in my glove box.

Other its pull hood release latch, located on the driver side left foot.

Good luck.

brown is ground, i do know that for sure.

tap on it & see if it will kick on sometimes they will work again if you tap on them with a rubber mallet hammer

If you still require this information I can email you the79 wiring diagrams [email protected]

Sorry you will have to remove the swaybar

With the engine set at top dead centre cyl 1 on the crank pulley the left hand distributor should align with the mark on the distributor body at about 2.30 3.00 oclock

IT NEEDS A GOOD TUNE UP

check the wiring in the car and the signal boards and the earth of the car is properly connected

exoticars 97370311

Please list these issues with the comment link below and I'll see if I can help.

Porsche 928 Wikipedia

There are two relays in the fuse panel under the front of the passenger footwell mat...board...also there are fuses for the headlamp motors there as well....there should also be a key indicating which fuse is which. And which relay is responsible for headlamp motor operation...I think it is the large on all the way to the right....wiggle while you have the headlamps turned to ON position...see if they pop up.....let me know how it goes...The headlamp relay is problematic on that model.

Have you checked all the wiring around the clutch lever, sounds like it shorting a wire out or making a connection somewhere.

Find the Porsche dealer service centre / parts department as they will have replacement keys and probably a key cutting and programming machine.