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Old 03-12-2003, 06:27 PM   #1
Mountain Main
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Join Date: Feb 2003
Location: Minturn, CO 81645
Posts: 109
Default Fuel injection load problem

My car is having problems. I have and 89 5.0 LX Mustang. I can start the car when I pull the car into a garage and hook the battery charger up to it. It will start up and stay running at idle, but as soon as I rev the car up to 5,000 RPM's the computer shuts down the car. I believe the cars not reading load properly

I adjusted the fuel pressure regulator and it is good and working in its ranges. The car has a new fuel pump. I put new plugs and new wires on that night. The cap is six months old. I pulled the TFI module and had that tested. Napa said it was no good.

So I bought a new TFI Module and the same problem. I have hooked up the scanner and did a key on engine running test. The scanner says all systems are good. I put a new MSD TFI Coil in the car. I thought it was the stator and I tested that, it was good.

I tested the throttle position sensor and it is good. It is perfect in the ranges. I did two of the tests for the wiring to the Mass Air flow and so far it is good. I believe the wire that I need to test the Mass Air Flow when the car is running is a ground hooked up right next to the battery into the finder wall. It has a connection that can be unplugged so it is possible the back Probe. The wire is Black and Green on my car and I believe that it goes to Pin number 41 in my wiring side of my ECM.

What has been other peoples experiences with Mass Air Flow Sensor going bad? Any suggestions are much appreciated.

Thanks,

Mountain Main
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