failure to start after warmed up - ZR-1 Net Registry Forums

orthodoct · 04-09-2017

Gentlemen:
Brand new problem. Car running fine after rebuild. Had my hair cut yesterday and got 92 ZR1 up to operating temp. Got back in car to go home about 30 minutes later. Starts, runs 3 or 4 seconds and dies. Throttle appears unresponsive at that time. Started about ten times then had to be towed home, seventy five bucks wasted! Once cooled down to below about 150 degrees oil temp, started just fine. Suspected fuel problem, but even with problem, Schrader valve on fuel rail is pressurized. Ran diagnostics this AM and no codes are set. Neither FP1 or FP2 fuses open. Fuel pump/sender unit is new and got it from Jerry about a year or so ago. Fuel filter changed when new pump assembly installed. Started this AM and ran up to operating temp of 192. Restarted immediately, but when attempted to restart ten minutes later, once again starts and runs 3-4 seconds and dies. No evidence of fuel starvation at WOT when running. I read about potential problem with loss of primary fuel pump and fact that both primary and secondary pumps run on startup (until 176 degrees I think that I read??) and then secondary shuts down except when secondary injectors come on line. If primary pump dead, would expect fuel starvation at WOT and it is a new unit. 92 ZR1 owned since new, Haibeck chip, new injectors from Jerry, rebuilt everything under plenum, new clutch from Bill Boudreaux, Stainless Works headers with Corsa exhaust. Has run flawlessly for over a year until this happened. What to do???
Thanks!
Ty (orthodoct)

04-09-2017	#1
orthodoct Join Date: Aug 2014 Location: Crossville, TN Posts: 88	failure to start after warmed up Gentlemen: Brand new problem. Car running fine after rebuild. Had my hair cut yesterday and got 92 ZR1 up to operating temp. Got back in car to go home about 30 minutes later. Starts, runs 3 or 4 seconds and dies. Throttle appears unresponsive at that time. Started about ten times then had to be towed home, seventy five bucks wasted! Once cooled down to below about 150 degrees oil temp, started just fine. Suspected fuel problem, but even with problem, Schrader valve on fuel rail is pressurized. Ran diagnostics this AM and no codes are set. Neither FP1 or FP2 fuses open. Fuel pump/sender unit is new and got it from Jerry about a year or so ago. Fuel filter changed when new pump assembly installed. Started this AM and ran up to operating temp of 192. Restarted immediately, but when attempted to restart ten minutes later, once again starts and runs 3-4 seconds and dies. No evidence of fuel starvation at WOT when running. I read about potential problem with loss of primary fuel pump and fact that both primary and secondary pumps run on startup (until 176 degrees I think that I read??) and then secondary shuts down except when secondary injectors come on line. If primary pump dead, would expect fuel starvation at WOT and it is a new unit. 92 ZR1 owned since new, Haibeck chip, new injectors from Jerry, rebuilt everything under plenum, new clutch from Bill Boudreaux, Stainless Works headers with Corsa exhaust. Has run flawlessly for over a year until this happened. What to do??? Thanks! Ty (orthodoct)