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18-22 DegreesBefore top dead center - When throttle positionsensor disconnected and using suitably programmedscan tool.When adjusting idle speed, set parking brake & chock drive wheels, curb idle speed (750-850 RPM)transmission in neutral.
8-12 DegreesBefore top dead center - throttle position sensorharness disconnected.When adjusting idle speed, set parking brake & chock drive wheels, curb idle speed (700-800 RPM)transmission in neutral.
8-12 DegreesBefore top dead center - throttle position sensorharness disconnected.When adjusting idle speed, set parking brake & chockdrive wheels, curb idle speed (700-800 RPM)transmission in neutral.
You likely have a massive vacuum leak. Check the rubber hoses coming from the intake after the throttle body for leaks or missing connections. You'll also be able to hear it with the engine running. It'll be a rushing air/sucking sound.
The idle in your car is computer controlled and should return to programmed specs when you replace the plugs with OEM recommended ones. But, the idle will be somewhat lower due to the age and condition of your vehicle and all it's engine control components. Don't expect it to be perfect.
This sounds like the altenator belt is loose. When the altenator is under a load the magnetic field causes the altenator to require more fource to rotate. At higher engine rpms the belt can be slipping on the altenator pulley. There is one other possibility I can think of and that would be that the voltage regulator is faulty and and causing an overvoltage at higher engine speeds and therfore opening up the field circuit to prevent the altenator from over charging the battery this is a safety function of the regulator. I would check the belt first.
if you washed the engine bay theres a chance you may have got water into the spark plugs or on the distrubutor, remove dizzy cap and remove water from the underside, sum crc products work well at this. usually after the engine gets hot it will evaporate the water away, I hope you don't have an exposed air filter, this could also be wet causing starvation. sum more info would be helpful
This car has hydraulic lifters( tappets} therefore should not adjustment, you probably have a bad or weak lifter. But, in any case you have to remove the valve covers to make the adjustment. You will see the adjustable bolt on the rocker arm. rotate the engine until the valve is all the way to the top, [no tension on the valve spring] then place a feeler Gage in between the rocker arm and the valve stem, adjust the rocker arm until the feeler Gage is snug but not tight. Do this with each valve. Check the book for the correct Gage to use but I think it is a .018.