A couple idling questions

[dmc67]

Ok Yesterday I done a Compression Test just to have something to do. and I took the plugs out everyone of them were Crystal White. I let someone borrow my car and he said he set the idling for me, I got polyurethane Motor Mounts and at 750 RPM it vibrates ya to death so he said he set it at 1000RPM which is where I want it, well I drove the car today and sometimes it will idle at 750 RPM's sometimes 1200 RPM's sometimes 1000RPM's. I called him and asked him what all he messed with and he said the BISS Screw and the throttle Cable Adjuster that is mounted on the intake. I know it is runnin lean or rich b/c of the white plugs. Here's the compression Test Results Passenger Side to Drivers Side, 185,180,190,191.


Now my Question is how do I know where the BISS Screw is sussposed to be at? I think someone told me along time ago to screw it all the way in and turn it out 2 turns and adjust from their with the Throttle Cable. Is this True? Or what else could it be?

Thanks for any help guys.

 

[ddavisaf]

http://www.plymouthlaser.com/timin.htm
This is how you adjust ignition timing. Once the ignition timing is set to what you want it at, adjust the BISS accordingly.
Compression test is perfect.
Also, make sure you check your throttle cable position is relation to the throttle plate. Replacing the fuel filter isn't a bad idea either.

 

[dmc67]

I changed the Fuel Filter, it was pretty nasty but wasn't the problem. I done the timing it was retarded at around 3-4 degrees I set it to +5 and then we took the wire off that was grounded started the car back up and Timing was at like +15 degrees But it said 5 when the aligator clips were hooked up. so I drove it up the road and on my way back down it was jumping from 800 to 1200 rpm's I reved it a couple times and it stopped surging well then I drove it around a lil more and it will idle surge if ya goin down the road and shove in the clutch but if ya rev it while clutch is shoved in it will quit..... When it's sitting still it idles like a charm. I am buying ohm meter today to test the ISC. and a couple other things.

Thanks