s2k manic

ok i know this has been discussed before but here me out anyways i have an my00 with a comptech sc ap2 pulley ap2 fpr aem water meth. car was running great a week ago battery failed sat 4 days new batt go for drive and above 7500 it starts leaning out first upper 13s then lower 14s i go home fuel pressure gauge on at idle i feed it 6 psi fuel pressure reads 85psi but when under load hits 80 and abruptly falls to 70 so i put a relay on fuel pump which is a fullblown 290 rebuilt fpr some dimpling on fuel disk in the bottom of the regulator so i used a body hammer and dolly to flatten them still has a catch at 80psi drops to 75 then goes back up to near 85 at redline but afr is 13 to 12.8 i also pulled the pump and checked the fuel line all was well not sure where to go from here and i know standalone is the way to go but not an option right now any thoughts on this?

s2k manic

so bleeding meth system helped but now going down the road a steady speed the car starts losing power give it gas and it goes away static fuel pressure it 65 psi any ideas please somebody help

s2konroids

It will need to run at 65psi at idle, thing is its sky high now and will be into the high 90's at WOT, once you start going past 100 you really push the fuel pump and run the risk of the injectors going static.

s2k manic

my idle fuel pressure is 47 psi. vacuum line off 65 psi wot redline is 85 psi i thought that was safe but ill try turning it down its still 13.4-13.6 from 5k to 7k with vetc set at 5100 mabye ill go to the largest jet on the meth see if it helps

s2konroids

You'll be okay at 60psi with vac line on but dont go any higher. Needs to be in the mid 12's AFR max.

camuman

U have so much going on. Go stand alone for the love of god.

s2k manic

as soon as i have the money ill get an emenage or go haltech

s2konroids

Camuman is right ATEOD, what you have will work but its as you guys call a 'band aid' method.

But yeah put it to 55/60psi at idle try 55 first.

s2k manic

so car blew a fuse last night seems the 3 month old fullblown pump is going bad at idle pressure it had a 15 amp fuse so hot you cant touch it so i put the loud ass walbro back in seems to run fine now will call fullblown on monday see what they have to say thanks for input will be looking for emanage if anyone has one let me know

s2k manic

so driving at a steady speed i get lean spikes it goes from 14.7 to around 17 then back down to 14.7 only once or twice in 30 min of driving. my plx wide band is feeding the ecm narrow band could my wide band cause this if the primary o2 sensor feed drops out no cel so im not shure what to look at anybody got ideas