timing problem

[tsidude]

When the timing is set to 5* btdc, and I remove the timing plug ground the timing jumps to 13* or more. But the manual says it is only supposed to go up to 8*. I set it just like it says in the chilton manual. Any help would be greatly appreciated!

 

[laserblue]

Warning... I may not know what I'm talking about!!!
Check that your idle rpm is correct. The ECU will advance the timing based on idle speed. A high idle could result in a timing advance of several º's.
Too much advance would make the engine ping [with low grade gas] when accelerating hard. Do you get that?

 

[tsidude]

My idle speed is fast but I can not lower below 1k rpms. It also surges all of the time, have not found a fix yet.

 

[steve]

If your idle is at 1K then the advance doesn't sound too out of line.
What have you done so far to fix your idle surge?

Steve

 

[tsidude]

I have cleaned the trottle body, installed egr blockoff plate, checked the biss screw for leaks, I have checked to see if the ISC is still moving but have not tested it with a multimeter yet. The plunger moves about 1-2 millimeters. Does anyone know if that is right, I think it should move more. Also could an intake leak cause a surge?

 

[DefJux]

Originally posted by tsidude
I have cleaned the trottle body, installed egr blockoff plate, checked the biss screw for leaks, I have checked to see if the ISC is still moving but have not tested it with a multimeter yet. The plunger moves about 1-2 millimeters. Does anyone know if that is right, I think it should move more. Also could an intake leak cause a surge?

I would check the ISC...it's so simple to do and it turned out to be the cause of my idle surge

 

[tsidude]

So today I tested the ISC and all the values were between 32 and 35 ohms. Does any one know if this is still good. I have seen a couple specs on this, one was if it is over 30 ohms at all its bad and the other said below 40 ohms is good if the car is warm.

 

[laserblue]

Somewhere in the range of 30~40 ohms means that the coil wires are good, probably. The main purpose of the test is to find out if all coils have 'continuity' which means... that you have a reading on the meter and not 'open'... which would give a reading of 'infinity'.
Sometimes the 'plunger' and the 'seat' have some crud on them and do not seal the air out properly. Also the cold idle valve [which is a mystery to me] lets too much air bypass. . . And yes, ANY air leak into the intake area WILL cause a fast idle condition!

 

[tsidude]

So it could still be my isc? Ill try to clean it. I also think I have a leak in one of my intercooler hoses. Could that cause a surge? I need to make a tester. Does any one have any other ideas?