ZR-1 Net Registry Forums - View Single Post - 1991 Zr1 bogging/jerking bad under acceleration

Johnny5 · 12-11-2021

After checking the fuel
Pumps amps thanks to Marcs write up, ohming the spark plug wires to check coil packs, voltage test alternator, vacuum fittings etc. I found the rubber coupling that goes to the map sensor was loose. Once i put a new fitting on it stopped falling on it?s face/or engine dying. At full throttle now the secondaries open and run good but at normal driving/accelerating etc it still
Jerks but not as bad. I will pull the plenum and do a complete tune up along with all
New rubber for the vacuum lines etc. i have a feeling i have another small
Leaks.

12-11-2021	#4
Johnny5 Join Date: Nov 2014 Location: New Jersey Posts: 362	Re: 1991 Zr1 bogging/jerking bad under acceleration After checking the fuel Pumps amps thanks to Marcs write up, ohming the spark plug wires to check coil packs, voltage test alternator, vacuum fittings etc. I found the rubber coupling that goes to the map sensor was loose. Once i put a new fitting on it stopped falling on it?s face/or engine dying. At full throttle now the secondaries open and run good but at normal driving/accelerating etc it still Jerks but not as bad. I will pull the plenum and do a complete tune up along with all New rubber for the vacuum lines etc. i have a feeling i have another small Leaks.