Problems when engine is hot

[hotmustang331]

Fuel pump? it would suffer at WOT, not so much at part. The pump just keeps the line pressureized, it would go WAY lean at WOT, if part throttle was effected.

 

[forpit2000gt]

I leaning towards a timing issue. It sure is a lot easier to type in a fix than to do it.

remove the predator tune and put back stock. do not just change the timing. not saying it isn't the fuel pump. bucking and surging deff. happens with MAF problems and timing to high. I have seen fuel pumps go out with fewer miles as well.

 

[04GT]

Problem is fixed!!!

It was the FUEL PUMP. Apparently, it was dying a slow death. Tech put it on the dyno and checked the pressure over a few runs and saw that pressure was dropping big time at WOT.

New pump is in and car is running great!!!

Woe be to the next ricer I encounter.

 

[forpit2000gt]

how much new stuff did you buy????
glad to see it's fixed anyways. I sure is a PITA when things go wrong and you can't just .......fix it.

 

[04GT]

how much new stuff did you buy????
glad to see it's fixed anyways. I sure is a PITA when things go wrong and you can't just .......fix it.

It's a little embarrassing to say, but I should not have any problem with my MAF, TPS, or IAC for many years to come.