engine timming

CHEVROLET S-10
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TIMWAGNER
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Hi, I need help figuring out why on my 2000 s-10 with 4.3 and 4wd 86000 mi manual trans, the timming is -8 degrees so therefore its very sluggish lack of power etc, Ive changed cam sensor, crank sensor, ecm, coil, spark control even distributor, nothing changed the performance is worse when the a/c is on,I guess due to the additional demand for power, I would really appreciate any help. thx Tim also I want to add there is no check engine light and with the ecm the knock sensor was changed also. thx again
Aug 24, 2007 at 8:25 AM
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MERLIN2021
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Do you have a scantool? If so attach it to the DLC, warm up engine then increase RPM to 1000 + Rpm.
Read the cam retard offset, if its Zero degrees + or - 2 its in spec, if not follow same steps but first loosen the distributor hold down bolt then start enginge and adjust to zero + or - 2!
Aug 24, 2007 at 9:10 AM
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TIMWAGNER
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[quote:8a46207808="merlin2021"]Do you have a scantool? If so attach it to the DLC, warm up engine then increase RPM to 1000 + Rpm.
Read the cam retard offset, if its Zero degrees + or - 2 its in spec, if not follow same steps but first loosen the distributor hold down bolt then start enginge and adjust to zero + or - 2![/quote:8a46207808] no scan too but i have a friend that does, will try that but i can tell you that from the last time i had the scanner on it it said -8 and as far as the distributor, its in a fixed position, how do you adjust? thx again tim
Aug 24, 2007 at 9:24 AM
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MERLIN2021
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there is a hold down bolt at it's base...loosen it but dont remove it! then you can turn the distributor...
Aug 24, 2007 at 9:27 AM
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TIMWAGNER
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[quote:1901c9f523="merlin2021"]there is a hold down bolt at it's base...loosen it but dont remove it! then you can turn the distributor...[/quote:1901c9f523] ok thanks ill try that, i just didnt think it would move much.
Aug 24, 2007 at 9:39 AM
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TIMWAGNER
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[quote:75c359b606="timwagner"][quote:75c359b606="merlin2021"]there is a hold down bolt at it's base...loosen it but dont remove it! then you can turn the distributor...[/quote:75c359b606] ok thanks ill try that, i just didnt think it would move much.[/quote:75c359b606] there is no adjustment in the distributor as i thought, im at a loss on this, maybe its a wiring problem?????
Aug 25, 2007 at 1:36 PM
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MERLIN2021
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Try increasing the RPM so it's over 1000! And your not trying to set the timming by the marks on the harmonic balance are you?....Bad....follw my previous instructions SCANTOOL REQUIRED!!!!
Aug 25, 2007 at 10:41 PM
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TIMWAGNER
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[quote:0134c5f8f2="merlin2021"]Try increasing the RPM so it's over 1000! And your not trying to set the timming by the marks on the harmonic balance are you?....Bad....follw my previous instructions SCANTOOL REQUIRED!!!![/quote:0134c5f8f2] no, we did use the scanner maybe im being thick headed but arent u still saying that u have to turn the distributor??? im very curious to know how to make a timming adjustment without, and yes we did increase the rpm,s too thx for your continued help.
Aug 26, 2007 at 12:06 AM
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