Stumble @ 4500RPM's

[fast ford brian]

03 , ported blower , 2.76 ,mafia , bap , fresh plugs ,fuel filter and newer pumps. Car stays tuned up , has 80,000 miles . So about 3 weeks ago my brother and I take a road trip . About 1/2 way I am getting bored and start to beat on the car a little and it starts acting up . In 2 nd and 3 rd only . As soon as I hit 4500 r's the damn thing almost shuts of for a split second . Not all the way but enough of a stumble to put you into the windshield as I am getting on it. I have checked the inter cooler pump , plugs , bypass valve , cleaned the mass air , I am stumped . Havent really drove it in 2 weeks other than short blasts trying to figure it out . Any input would be grately appreciated !

 

[Jimmysidecarr]

Pull the plugs, take good quality close ups of each one numbered with the cylinder they came out of.

Do a compression test or better yet leak down while you are at it.

 

[fast ford brian]

Its official ,I have a fuel problem . Tank goes down tommorrow .

 

[MoKo_03SVT]

what did you find out is causing the problem? and how did you find out?

 

[fast ford brian]

Seek and destroy strategy. Narrowed it down to fuel delivery by process of elimination . Pulled the tank after checking BAP settings ,fuses and rail pressure. Found a split hose in the tank . Only one pump was pushing fuel at WOT . I have a pprv delete and apparently the hose in the kit was NOT a submersible in fuel hose !

 

[Jsko]

I am going through the same issues right now. I replaced the FRPS, but it appears to be a hose or pump, I was only pulling 49.99% cycle duty on the pumps

 

[fast ford brian]

If all else fails run it low on fuel and pull the tank .I am glad mine was a simple fix , just time consuming .

 

[MoKo_03SVT]

Seek and destroy strategy. Narrowed it down to fuel delivery by process of elimination . Pulled the tank after checking BAP settings ,fuses and rail pressure. Found a split hose in the tank . Only one pump was pushing fuel at WOT . I have a pprv delete and apparently the hose in the kit was NOT a submersible in fuel hose !

glad you were able to find out what was causing the issue...and glad you were able to get it fixed!!

:rockon:

 

[Stalker27]

I'm goin through the same damn thing. Driving it around now to burn the gas then the tank is coming down

 

[Jsko]

If all else fails run it low on fuel and pull the tank .I am glad mine was a simple fix , just time consuming .

Yea its down to 1/2 a tank right now. Ill get to it.

 

[fast ford brian]

If you have to do it by yourself get a transmission cradle for your floor jack . Its like having an extra set of hands .