ZR-1 Net Registry Forums - View Single Post - NO START on 2 ZR-1's

QB93Z · 04-09-2017

You have a lot going on with two ZR-1's with problems. Start with the Red 1990. You may have a VATS (Vehicle Anti-Theft System) problem. The computer may not be reading the chip in the ignition key properly during start. Or the ignition switch has been damaged. Are you sure you are using the correct key in the correct car? Been there done that.

The "starts then dies" can be an indication of a failed primary fuel pump, but it depends on the timing. From a cold start the car may run for 1 or 2 minutes then die. On a warm start, the engine will stall after 3-4 seconds.

The gauges going off and on could indicate an ignition switch problem and/or an electrical ground problem in the engine control circuits. The steps below may help diagnose this.

The ignition switch in Run, engine not started should turn on all the accessories, the dash and instrument cluster and briefly light all the indicators on the Driver Information Console. Also Key On/Engine Off energizes both fuel pumps so you can listen for the pumps running or put a gauge on the fuel rail and check the pumps without starting the car. Although it isn't an issue right now, Key On/Engine Off also energizes the Secondary System Vacuum Pump. If the engine has not been run for a few minutes, you should hear the Vacuum Pump run for a short time then stop.

Put the key in Run but not started and then wiggle the key slightly to see if the symptoms are repeatable.

Has this car been worked on or modified before all the other drama that you have gone through?

Jim

04-09-2017	#6
QB93Z Join Date: May 2007 Location: Westminster, Maryland Posts: 3,687	Re: NO START on 2 ZR-1's You have a lot going on with two ZR-1's with problems. Start with the Red 1990. You may have a VATS (Vehicle Anti-Theft System) problem. The computer may not be reading the chip in the ignition key properly during start. Or the ignition switch has been damaged. Are you sure you are using the correct key in the correct car? Been there done that. The "starts then dies" can be an indication of a failed primary fuel pump, but it depends on the timing. From a cold start the car may run for 1 or 2 minutes then die. On a warm start, the engine will stall after 3-4 seconds. The gauges going off and on could indicate an ignition switch problem and/or an electrical ground problem in the engine control circuits. The steps below may help diagnose this. The ignition switch in Run, engine not started should turn on all the accessories, the dash and instrument cluster and briefly light all the indicators on the Driver Information Console. Also Key On/Engine Off energizes both fuel pumps so you can listen for the pumps running or put a gauge on the fuel rail and check the pumps without starting the car. Although it isn't an issue right now, Key On/Engine Off also energizes the Secondary System Vacuum Pump. If the engine has not been run for a few minutes, you should hear the Vacuum Pump run for a short time then stop. Put the key in Run but not started and then wiggle the key slightly to see if the symptoms are repeatable. Has this car been worked on or modified before all the other drama that you have gone through? Jim __________________ If it isn't fun, you aren't doing it right! 1990 Black ZR-1 - sold 1993 Quasar Blue ZR-1 1994 Competition Yellow ZR-1 1995 Dark Purple ZR-1 Maryland State Coordinator WAZOO Member Last edited by QB93Z; 04-09-2017 at 08:01 PM.