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Discussion Starter · #41 ·
Hi. Ok, I got the new EngineTec double roller cam and crank gears installed. (Rock auto) I left out the oil slinger as suggested as it did grind on the gear. New problem/question! The engine will only run/idle pretty decent with the timing at about 40 degrees BTDC. This seems like way too much. My Chilton's manual says it should be at 18 BTDC. My timing light just broke so the 40 is a static approx. with the rotor at #1, engine off. Any ideas why the timing has to be so far advanced for it to run? If I retard it, it stalls and won't start. It sounds ok at high rev and idle at this setting. The EngineTec crank gear was a 0 degree setting, which eliminated the EPA 3-degree retard that Ford put in the original crank gear. Vacuum advance was connected during this start-up. Because I had to advance it so much my vacuum advance diaphragm is way off to the left now instead of in front of the distributor like it used to be. Do I need to rotate it a tooth or 2 on the cam with the #1 piston at TDC and rotor at #1 to get it back in the front and make up for the 40 degrees BTDC needed to keep it running?

Thanks again!
Bob
 

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You likely have a vacuum leak or other problem.

Leave the cam indexed as it is.

Double check total and initial timing with a light.





Scotty J. "AKA" The "Mad Porter"
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Discussion Starter · #43 ·
Ok. Not a lot of places for a vacuum leak since I plugged most lines for racing. Still don't understand why it needs 40 degrees of advance to run half-way decent? That seems like a lot of advance. I don't want to cook a valve if the spark is that advanced.
Thanks
 

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HI, Get a new timing light if yours broke... you can't set or even tell what the real timing is without one.. you are only guessing.. and timing is NOT a guessing game.. If it won't run at proper timing you have other issues.. Leave the chain and gears where they are dot to dot as Mad says..

good luck take care be safe
tim
 

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I have a feeling that the cam and crank is as it should be timed on the chain. I do think that the distributor is off by a tooth or so. You said the vacuum can has to be swung too far for it to be close to being in time? Pull the distributor out and turn the rotor one tooth back then drop it in and re-time it. I have a feeling this will get you back in the ballpark to get the timing correct...
 

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HI Just a heads up.. I don't know it I mentioned it but the crank turns twice to one turn of the distributor. That means the at one TDC of the crank the rotor well line up to #1 wire in the cap and the next full turn of the crank to TDC it well be 180* out. make sure you have the right one..

good luck take care be safe
tim
 
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