fotograf

I'm having some serious issues with my 87 5k's idling. For the past week or so it has been having trouble keeping a steady idle and even at rare times dying while I am braking because it can't conatin a good idle speed. It has been intermittent and gotten slightly better but still never went away. Well today I decided to switch out the air filter, fuel filter and fuel cap just to see if it would help and now the car won't idle AT ALL. If I do it just right I can start it up, catch the throttle at the right time and manually float the idle or RPM at any speed, but when I let it go, it will not idle at all.

I have checked the ISV by blowing through it already and it passes that test. I've also done a quick-through for vacuum leaks and can't find anything...

Any help or ideas would help a ton! If I can't get any tonight, I'm going to have to send it to the shop...

Blue44

If the idle stabilizer valve works.. (meaning it turns on and spins the little cam inside)

look for the idle mixture screw on the front of the intake manifold where the black boot goes into the aluminum intake (by your throttle cable)

Turn the mixture screw all the way in. Then turn it 1 and 1/2 turns out.

This is the usual spot where the idle mixture screw should sit when adjusting the "CO" fuel mixture screw.

I would check this first. Then if there are more problems, adjusting the fuel mixture screw will be needed.

please report back

Alex

fotograf

Thank you for the quick reply!

I just adjusted the idle mixture screw (it was all the way in :0) and the same problem is popping up. Where is the fuel mixture screw located and should I make the same 1 1/2 turn adjustment?

Blue44

check everything such as air leaks - plugs - flooding...



After mentioning this on the phone I was not sure if the fuel adjustment screw was found.

For your own knowledge a very long 3mm allen wrench is needed to adjust the "CO" fuel mixture screw (see pictures) I doubt this is your problem. A 5 cylinder usually runs at almost any position on the fuel mixture screw - you're saying your car doesn't run.

I'd check for air/vacuum leaks

Kneale Brownson

Before you mess with any more adjustment screws, look for leaks:

http://www.blackfoot.net/~hlm5860/Tester.html

Blue44

I'm curious as to what you find - post if you can

Blue44

list of diagnostic info for your 87 5k TQ

http://www.sjmautotechnik.com/troubl...ting/ecuf.html