1979-1993 & 94 Conv [Subscribe to Daily Digest] |
Okay, let's try to keep it simple. First check the fuse.
I'll assume your '86 turbo is a 5-speed like mine. The first thing you'll want to know is if your pedal switches are working and holding a vacuum when they're supposed to. Disconect the vacuum line from the vacuum pump under the hood by the APC. The further down from any T's the better. If you have a vacuum hand pump check for a good seal. If you don't have a hand pump try blowing through this hose. Air should not be able to pass through, however just to be sure pick up on the brake and the clutch pedals as sometimes this little bit can make a difference. If you can't hold a vacuum, then the problem can be one or both vacuum switches as well as a possible hole in the line.
The first time I fixed my '86 this last one was the problem. Check where the line goes through the firewall for chaffing. You may have to pull it through an inch or so.
If that didn't get you anywhere go back to the vacuum pump located by the APC. It's pretty rare for that to go out but you never know It just might save you aggrevation and alot of work.
You'll need a length of wire to jump the terminals to the battery. Disconnect the harness on the pump and connect the battery + lead to terminal no.3 which is the one on the right with the flat side facing away from you. Terminals 1 & 2 go to ground. This should get the pump humming and vibrating (in other words it works).
If it does work you should see the throttle moving as the regulator pulls on the gas pedal. Should the throttle not move, the regulator is either not connected or its bad.
When you see the throttle move, remove the wire from the middle terminal. This will turn off the pump but watch the throttle to ensure that it doesn't creep back to the idle position. If it creeps back you most likely have a bad regulator. The regulator is supposed to return back (throttle close) when terminal no. 1 is disconnected.
If this works then you'll have to pull out your tools rip out your kneeboard and crawl under your dash. Something I have to do sooner or later to fix - whatelse - my cruise control.
Go ahead and pull out your center console, your ashtray, and the bolt behind the ashtray. Now from the engine bay near the door hinge area there should be a small bolt, one on each side of the car , all by itself. Remove these two bolts while someone insde supports the kneeboard just in case it falls.
Now locate your pedal switches. The clutch pedal only has one and the brake pedal has two similiar looking ones. One is the switch for the brake lights and the other has both a short hose as well as wires going into it.
Before you do anything just take a look at the switches with the pedals in the resting position. There should be a slight gap of about 1mm from the end of the plunger to the platform on both pedals. If they touch they need to be backed off.
While you're down there, look up past the steering column and over by the gas pedal and check to see if the little chain is connected to the regulator and pedal and also check the regulator for any holes and general serviceability.
This is where you check for a good vacuum if you couldn't get it to hold one earlier. Disconnect one switch at a time and check as before.
Hopefully this should be as far as you need to go. It's usually as far as I need to go. Don't forget to check the rest of the line coming in from the firewall.
Now that I think about it, double check the stalk for security. I don't remember if it was my wipers or cruise but when I took the cover off and tightend some screws, it seemed to work fine.
Let us know if this doesn't fix it and we'll send info on doing the continuity checks.
What's your '86 turbo like and what are your plans for it?
Mine is a platinum blue 3dr, my first car and I need to fix the brake master cylinder. I'd love to restore it,engine,suspension, interior, you name it. Good thing I have my '92 turbo cnv.(oddly enough the cruise control on it doesn't engage either - can anyone tell me how to pull the kneeboard on a convertible?)
-God bless
, Thu, 19 Apr 2001 20:42:59
, Fri, 9 Mar 2001 22:58:58
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