ZR-1 Net Registry Forums - View Single Post - Engine Cut out after 3-5 seconds

Jagdpanzer · 03-10-2015

Similar thing happen to my 94 when I first got it. Turned out the primary fuel pump was seized up and only the secondary fuel was working which the ECM shuts off when then engine coolant temp reaches 176 degrees. Replaced the primary pump and it has run fine ever since. Also keep in mind when the engine is up to temp during restart the ECM runs both pumps until the engine reaches firing speed of around 400 rpm. Then the secondary pump is cut off. When driving the ECM turns the secondary on based on power key full power position and driving demand.

03-10-2015	#5
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,649	Re: Engine Cut out after 3-5 seconds Similar thing happen to my 94 when I first got it. Turned out the primary fuel pump was seized up and only the secondary fuel was working which the ECM shuts off when then engine coolant temp reaches 176 degrees. Replaced the primary pump and it has run fine ever since. Also keep in mind when the engine is up to temp during restart the ECM runs both pumps until the engine reaches firing speed of around 400 rpm. Then the secondary pump is cut off. When driving the ECM turns the secondary on based on power key full power position and driving demand. __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake