ZR-1 Net Registry Forums - View Single Post - car pulsates under load when in power mode

VetteMed · 04-13-2011

Being a 1991, injectors are certainly a likely explanation. If they are original, I'd bet on one or more being faulty.

Many aftermarket brands available - Accel, RC Injectors, FIC (sells reconditioned Bosch units, popular because they're about half the price of the others).

Oil change tricks? Elevate car, remove drain plug, drain oil. Reinstall drain plug, change oil filter, refill with oil. Takes about 9 quarts for a typical oil change. There is oil that remains in the oil cooler plumbing, 3-4 quarts, which cannot be drained easily.

04-13-2011	#2
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,816	Re: car pulsates under load when in power mode Being a 1991, injectors are certainly a likely explanation. If they are original, I'd bet on one or more being faulty. Many aftermarket brands available - Accel, RC Injectors, FIC (sells reconditioned Bosch units, popular because they're about half the price of the others). Oil change tricks? Elevate car, remove drain plug, drain oil. Reinstall drain plug, change oil filter, refill with oil. Takes about 9 quarts for a typical oil change. There is oil that remains in the oil cooler plumbing, 3-4 quarts, which cannot be drained easily.