454 mag mpi running rich!!!
08-05-2018 | 07:03 AM
#11
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Joined: Jun 2004
Posts: 7,320
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From: frankenmuth michigan
A scan tool will verify if the coolant temp sensor is working correct plus one can check to see if the temp gauge on the dash is reading the same temps as well.
Steve --- Is that the stock tune ? and what Mefi is the display from ? 60 thru 120 is reading Base pulse width modifier at 1 - that does not seem like the stock cal if I recall correctly ?
Steve --- Is that the stock tune ? and what Mefi is the display from ? 60 thru 120 is reading Base pulse width modifier at 1 - that does not seem like the stock cal if I recall correctly ?
08-07-2018 | 09:37 AM
#13
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Joined: Jul 2011
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From: Ft. Worth TX
Yes I know it was in Celcius plus C shows on your screen shot, I just did the conversion in my head from C to F and that was way off in temp ranges because I had it all screwed up. I had to convert it online inwhich showed the correct converted temps from C to F.
08-07-2018 | 09:40 AM
#14
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From: Ft. Worth TX
08-07-2018 | 10:17 AM
#15
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Joined: Jul 2015
Posts: 1,201
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From: Atlantic Southeast
'96 7.4 LX Mpi here and I had an intermittent rich issue. Wound up being a damaged TPS harness. I would wiggle the harness and you'd see black smoke, hold it at a certain angle and it cleared up.
To elaborate, I replaced the plug on the harness side.
To elaborate, I replaced the plug on the harness side.
Last edited by Tractionless; 08-08-2018 at 07:07 AM.
