Taxman2580 Posted October 13, 2012 Share Posted October 13, 2012 I have a 1998 ch612. Engine shuts down when at full operating temp. Blink code 5-4. Prior to this Mack dealer installed rebuilt injector pump and injectors. This proplem only occurs at full temp 180 degrees or so. Gray connector seems good and tight. It takes my truck a long time to warm up. I also replaced throttle position sensor.(thottle pedal) Is there another relay, if so where? Thanks Quote Link to comment Share on other sites More sharing options...
fjh Posted October 15, 2012 Share Posted October 15, 2012 I have a 1998 ch612. Engine shuts down when at full operating temp. Blink code 5-4. Prior to this Mack dealer installed rebuilt injector pump and injectors. This proplem only occurs at full temp 180 degrees or so. Gray connector seems good and tight. It takes my truck a long time to warm up. I also replaced throttle position sensor.(thottle pedal) Is there another relay, if so where? ThanksHey Bro Chuck some cool water on the back of the fuel pump If the engine fires back up you will need to r and r the fuel pump and have it looked at at a reputable pump shop as the rack actuator is fubar! Quote Link to comment Share on other sites More sharing options...
Taxman2580 Posted October 18, 2012 Author Share Posted October 18, 2012 The pump has just been rebuilt by Mack dealer. Checking connections at the computer module. Might need new module? Quote Link to comment Share on other sites More sharing options...
Taxman2580 Posted October 24, 2012 Author Share Posted October 24, 2012 yo you were right about the water, I heard someone else talk about putting ice on it. Thanks Quote Link to comment Share on other sites More sharing options...
fjh Posted October 25, 2012 Share Posted October 25, 2012 good luck with it! Quote Link to comment Share on other sites More sharing options...
Taxman2580 Posted November 24, 2012 Author Share Posted November 24, 2012 Mack dealer returned pump to rebuilder, they fixed it, rack actuator. Truck runs good now. Thanks for your help. Quote Link to comment Share on other sites More sharing options...
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