ZR-1 Net Registry Forums - View Single Post - Continued issue when car hits 125 degrees

LGAFF · 08-28-2013

Still having this issue with the car, within about 3-4 minutes of startup, when the car hits 125 degrees, without fail....the car sputters, and misfires, the alt readings drop and flutters. Once the car hits 3K RPM the engine corrects and the problem never comes back until the next time the temp drops below 125.
*Replaced 02 Sensor
*Checked 02 grounds
*Replaced primary fuel pump relay
*tried a different chip
*tried a different ECM
*Changed the plugs
*Checked fuel pressure with car off primary and 2ndry(it still hauls *** so unlikely a fuel issue)

08-28-2013	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Continued issue when car hits 125 degrees Still having this issue with the car, within about 3-4 minutes of startup, when the car hits 125 degrees, without fail....the car sputters, and misfires, the alt readings drop and flutters. Once the car hits 3K RPM the engine corrects and the problem never comes back until the next time the temp drops below 125. Replaced 02 Sensor Checked 02 grounds Replaced primary fuel pump relay tried a different chip tried a different ECM Changed the plugs Checked fuel pressure with car off primary and 2ndry(it still hauls ** so unlikely a fuel issue) __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359