fuel delivery problem..

[sldewyz]

91 ka24de bone stock...

problems

it loses power under load above bout 2300 rpm, all the plugs are white showin me that its a very lean condition. and plugs are firing fine.

pretty new walbro fuel pump and z32 fuel filter and injectors seem to be firing fine.

my geuss is filter or fuel pump but there pretty new so its got me stumped. anyone know the resistance values so i can check it with a dvom?

thanks-mike

[OutToWinPAHC]

regulator?

[kainvamp]

yea sounds like fuel pressure regulator

[sldewyz]

thats what im thinking at this point now...thanks guys for ur imput!

[sldewyz]

and recomendations on an adjustable fpr? other then the nismo one?

[OutToWinPAHC]

aeromotive

[hilux30]

rrrrreeeeeguuuuuullllaaaatoooor!!! SARDS is nice

[Koshin]

fpr for sure Mike...How bad were the plugs?? was it knocking at all??

[sldewyz]

rrrrreeeeeguuuuuullllaaaatoooor!!! SARDS is nice

mount up

fpr for sure Mike...How bad were the plugs?? was it knocking at all??

yea the plugs are perfectly fine but white as snow so i know shes runnin more thirsty then a marathon runner in the desert...no knocking really at all.

rich you still got a bud that works at the nismo shop? im leaning towards the nismo fpr because of cost and ease of instalation and not wanting to buy other fittings and lines with an external fpr that is remotely mounted.

[sldewyz]

ok well i changed out the fpr (nismo) and the tps. i adjusted it and it got a little better as in after about 2800 it picks up full no problem. when i start off it is really lacking power. it goes like when you partially give in the clutch and ride it. i know the clutch isnt the issue that was just an example of how it has no power i kno its somethin with the fuel. my walbro pump is only about 8 months old. help me out!!!