Will work for turbo parts
Join Date: Jan 2007
Location: SE, WI
King_Ice_Flash2 is offline
Re: Timing adjustment on a 2000 S10
If it really is pinging, something is wrong, and reflashing the PCM may help the symptoms, but not the problem. The PCM is tuned way on the safe side of timing from the factory, and an aftermarket tune will add more timing and still be on the conservitive side.
Have you replaced the fuel filter recently? Sparkplugs/wires? Clean out the EGR passage?
Any check engine light? Maybe you could get a scanner that detects knock retard?
The distributor is controlled COMPLETELY by the PCM. The 2000 will have a vacuum resivour, but it is stuck inside of the fender or dash.
If you suspect a vacuum leak. you can disconnect the vacuum line off the back of the motor, and use a short piece of vacuum line with a golf tee stuck in it to verify.
If a vacuum line is left disconnected, you should get a MAF error, because that thing is pretty sensitive.
2003 S10 Long Bed 4.3L ZQ8 + 2/3 drop, Caltracs, rear disk conversion, 7" dual diaphragm booster, 255/50/R16 Falken ZE-512, MPFI converted 2114, 48LB Racetronix injectors, eBay RS BOV, Accel 60115 distributor, Aeromotive FPR, Corbeau Forza seats, Mach headers, 2.5" front mount intercooler, Innovative turbo, Precision Industries Vigilante 3,000 RPM torque converter, EFILive COS3 tune.