OK After setting my base timing to 10 degrees BTDC and reinstalling the inline spout connector(shorting bar), the timing should advance to about 30 degrees according to all repair manuals I've read. However my timing advances to about 23 degrees. Is this OK. The engine seems to run ok but hesitates and stalls out a couple of times when it is cold.

 

Are you testing the timing advance according to procedure (as part of the KOER test)?

 

But of course!

 

I've seen one other person here (or BII forum, maybe) who had a problem with not getting enough timing advance. He replaced the computer to fix it. There doesn't seem to be a lot in the manuals about diagnosing inadequate advance. Manuals assume either adequate advance or no advance. I would start by checking the wiring to the computer, TFI ignition module, and crank sensor and mak sure there are no loose connections.

 

Thanks for the info mrshorty. I'll check them out and let you know what I come up with.

 

I just finished resolving a similar problem on my 87 Ranger 2.9v6.
My truck's timing wouldn't advance under load or going up a grade,it severly lost power. I couldn't remove the screws that keep the ignition control modual (ICM) attached to the back of the distributor...one of the screws had a plug over it. I was going to remove the ICM and have it tested, but when I couldn't remove it from the distributor I just put in a new distributor and ICM. It solved a lot of problems.....From my understanding, the ECM recieves the engines RPM from the cam position sensor at the base of the distributor. The RPM signal is sent through the ICM to the ECM and sets the timing advance based on that signal. Another strange problem I was having was that the engine would lug down and hesitate when ever I increased the electrical load.....turning the fan on the climate control to 3rd or 4th (highest) position, using the cig lighter, using my bright lights......it didn't lug down if I engaged the a/c. I went through a lot of troubleshooting ( load tested the batt and alt, replaced the ignition switch, installed a new AIC, new fuel pressure regulator, new high pressure fuel pump, new fuel filter, complete tune-up), but nothing helped until I changed the dist/ICM. Hope this helps someone!!

 

Hey BFF,
Your solution may be just what I need. Where did you get the new distributor?

 

Hey BassFishingFool,

I've thought about that a lot thinking that may be the problem. I think that may be my next step. Thanks for the feedback.