85 2.3l FI timing confusion

[Dustinicus]

I was running a timing light on my pickup and found that it's base time was something around 20 degrees of advance, but when i would throttle it, it would pull timing out, and the more and harder i rev the engine the more it would pull to the point that it would have maybe 2 degrees of advance

I am pretty sure that a naturally aspirated engine should start at something like 12 degrees and go up to 25 or 30 degrees. Can anyone explain this?

The EEC module has the GA1 code. I have done searching online for this particular module to no avail, and cannot find any information on it.

Any information that someone might have on this would be great, jsut trying to understnad it is all.

Thanks,
Dustin

 

[tomw]

Don't mess with the timing unless the engine is fully warmed up, as it is/should be fixed at 10 BTDC until the computer takes over. If you remove the SPOUT connector, the computer lets go, and the timing should be manually set (turning the dist) to 10BTDC, and then the clamp tightened. Re-install the SPOUT jumper into its socket hanging off the wiring harness leading from the drivers side inner fender to the side of the engine. I think red/hash insulation, but from memory, on the SPOUT jumper.
After setting the base, static 10degree timing, the computer should generally advance the timing as the rpms increase. If you mark the pulley groove with a chunk of drywall 'core'(close to chalk, and all I have), the mark will move up and even over the 'top' of the pulley as the engine revs, returning to 'close' to 10BTDC as you release the throttle and the revs settle down.
tom

 

[scotts90ranger]

I haven't ran a 2.3L with adjustable timing yet, but I do know that if you are trying to check the spark, pull the SPOUT connector, it's a little jumper that goes to a 2 pin connector somewhere near the coil or distributor, then set your timing... there is a spark stabilizer in the idle circuit that makes the advance crazy at idle, pulling the SPOUT connector stops that...

 

[Dustinicus]

there is a spark stabilizer in the idle circuit that makes the advance crazy at idle, pulling the SPOUT connector stops that...

I wasnt aware, thank you I will check that out

-Dustin