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Old 07-17-2018, 10:48 AM   #6
jfnar
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Join Date: Jul 2009
Location: Jonesboro, AR
Posts: 410
Re: L6 timing question

I checked a couple things last night. I put a vacuum gauge on the distributor vacuum line and it gets no vacuum until the engine speed is increased. I don't know what speed it kicks in because I couldn't see the tach. I put a vacuum pump on the distributor and it does rotate when the vacuum reaches about 10 to 12 in hg. Not exact measurements but I'm working with cheap HF tools. I advanced the timing until it seemed to be running best but it was way off the scale. I backed it down to approximately 17 to 18 degrees. Again, this is an estimate because my scale only goes to 12. I drove it and I really couldn't tell any difference. I'll probably back it back down to around 15 or so just to ensure I don't have any detonation.
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