hey, when you adjust your timing, does the car HAS to idle at 750 RPM?
I'm asking cause my car idles from 500 to 1500 RPM depending on its mood.

thanks

 

To get an accurate reading, yes. Timing changes with rpm, and rpm changes with timing.

Take an engine that is set to stock timing and idles at 750. Advance the timng. THe car will idle up as well. Retard teh timng, and the car will die.

Take a car set to advanced timing with a 750 idle...retard timing to stock, adn the car will die, until the idle is readjusted. Get it? Idle and timing are closely related, adn are a function of one another in a way.

 

Yeah, it's gotta be damn close, otherwise the timing will be off (there's a difference between setting the timing at 1500 rpm and setting it at 750). Try to get it to hold 750 if at all possible (I had to do mine while it was at 800, but I figured that's acceptable).

Eric

 

what should the timing be at i do like to step on the gas a bit and when i do it has a miss i have a timing light but cant seem to find what the timing is saposta be on an 87 turbo II

 

Somewhere around 1100 rpm the timing gets advanced by the ECU from the FIXED TIMING of -5 L and -20 T. Anything below 1000rpm should be FIXED timing of -5 and -20.

Timing and how to is in the FSM.

If I had a engine that was "idling" at 1500rpm, I'd be more interested in fixing that than anything else.

There is/was a Training Manual on this site once upon a time. In the FUEL AND EMISSIONS chapter, page 4-49, it shows the FIXED TIMING being below 1200rpm.

CRANKING TIMING is a plus 5 and 20. That's cranking, not idle. Then again, who checks CRANKING timing anyway? I guess you could. Maybe remove the sparkplugs so it'd rotate faster and use a timing light. I'd never do that, but it could be done, I suppose.

 

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