2005 - 2014 MustangsDiscussions on the latest S197 model Mustangs from Ford.
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Been posting on many forum in regards to my issue here
Before I take it into ford.
Issue is p0191, p1237 and the pump is constantly running with the key on (no engine start) but yes it turn off once key is off ,
as the chart below shows i'm seeing 75psi at the fuel rail, and pump is at 0.75 duty (150%?)
can anyone look at this data log and tell me if the pump seem to be bad , i see negative values at the pump, but the tables (pcm and fpdm) is giving positive voltage
Before i take it into ford just wanted some of y'all professional advise!
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Im having the opposite problem. I keep getting the same code on my 05' GT. The pump stays on for a second when i turn key on (normal) but it starts REALLY HARD. Other times it doesn't start hard. It idles perfectly normal with no backfiring or missing. I replaced the fuel pump in Sept 2012, fuel filter was replaced about 2000 miles ago, I cleaned the MAF sensor, replaced spark plugs, and also replaced the fuel rail sensor. The car hesitates sometimes when I press down on the gas (not jumping on it) which is triggering the code. Its almost as if something is causing the fuel pressure to "hiccup." Any ideas????????
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