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fuel injector lowsignal on one injector, o

1993 saturn twin cam will not run with all injectors hook up. If you pull the one off of # 4 cyl. the car will start. If you hook the injector connection but up the car will shut off.

Car is running lean, because exhaust manifold gets very hot. Have put new 02 sensor and map sensor in. Stumped

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@pickupguy56 , Nick, Probable cause is #4 injector bad. Checked some GM forums, you could have a shorted multec injector at #4 cylinder, which will shut down the ECU. When unhooked the ECU will work with the 3 OK injectors. Test/check each injector with a Ohm meter. They should be at 16 Ohms, below 10 are no good.

If high mileage probably best just to change all the injectors while apart as the others may fail not to far behind. Good luck.

I hope this helped you out, if so let me know by pressing the helpful button.

https://www.youtube.com/watch?v=FEFLtw3T...

http://www.thirdgen.org/forums/tpi/56779...

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