adrnlnjnky700

installed a new fuel filter and an inline 255 walbro, still when i go wot it hesitates then goes, it feels like its not getting fuel still. my fuell pressure is good, not sure what it is at wot but at idle its fine. the tuner said my MAF is close to maxing out on the voltage, could i possible be pushing the limits of my MAF and that causing it to hesitate. any ideas

94redGTConv

clean your maf tps and iac valve for first troubleshooting if that doesn't clear it try running some fuel filter cleanser, does it seem like throttle response or all motor?


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adrnlnjnky700

Ok. ill try cleaning all those. and yea it feels Like motor. the response is there the whole time except when I go wot.

mattdel

Did you happen to notice whether or not the baffle in the tank was any good while you did the fuel... oh you used an in-line. You using a fuel cell or something?

adrnlnjnky700

No I have an 255 intank too. It looked good. The hesitation is really quick. Like ill put my foot down slowly then to the floor and all of a sudden bam, it cuts out. It's a very hard jerk or stall. And then I usually let off and I still have plenty of power but the wot kills it.

mattdel

Maybe TPS. Got an oscilloscope handy?

adrnlnjnky700

Only if I could take the one from work.

mattdel

Use it at work if you can. Probe the middle wire(I think?) on the TPS, then actuate the throttle by hand, slowly, up to WOT. Should be a clean, linear rise from whatever the base voltage is, up +4 volts to WOT.

adrnlnjnky700

i work on submarines, they dont like me bringing my home to work. lol

89fiveeight

O/T... Do you work at EB?