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MR252SS

09-05-2011 01:28 PM

454 MPI LX not reaching WOT

Just replaced motor with a remanufeactured 454 Gen IV in my 97 Formula 252 SS. The intake manifold had to be replaced due to damage from original motor. The fuel injection system has been gone over and everything seems to be working as it should., According to the diagnostic computer all systems are functioning as they should, but I can not achieve 4600 RPM, can only achieve around 4000 RPM. Any suggestions?

Blueabyss

09-05-2011 01:42 PM

Make sure throttle body is opening all the way since you had the linkages off. Next would be to send out the injectors for inspection and or cleaning.

Chris

MR252SS

09-05-2011 01:47 PM

Thanks Chris !!!!! I'm going to mention this to my motor guy!!

Ebay Ed

09-05-2011 03:09 PM

my fuel pressure regulator died in the time frame i replaced my blowed up engine last year

MR252SS

09-05-2011 11:40 PM

did fuel pressure fluctuate at different RPM or did you find problem through diagnostics?

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