[KBOOSE]

So after replacing both walbro fuel pumps a fuel filter and the main efi fuse
my car is still going lean at wot my question is what would be next to check.

 

[Carter-95TT]

I'm just guessing, but fuel pressure regulator maybe??

 

[KBOOSE]

After installing everything the feul pressure went up from 30 psi at idle to 45psi wich leaves me to believe it isnt fpr

 

[95BlackTT]

What are you using to measure A/F with?

 

[FLINTSTONESKID]

what about the tune? how about the injectors? what duty cycle are you running them at under WOT? lets start there as there are quite a few things that this can be symptomatic of.

 

[97supramichael]

I had a problem like yours where my afrs would go very lean when trying to accelerate and just run like complete shit. I replaced my emanate ultimate with AEM and problem solved.

Your ems or ecu may be the culprit

 

[YoungA80]

What would you all agree to be a great A/F ratio, so next time I watch my aem wideband I will know..I was always told 12 is a place you want it to be as your rpms are going up..Is that true?

 

[FLINTSTONESKID]

i assume you are asking at WOT? high 11's is about as high as i want to go on a pump gas street car with no meth. low 12's can be run, though i wouldnt, but this is as much about the tuner, what gas, and where you live, among other things such as driveability, gas mileage, ect.

 

[StickyRice]

I'd still swap the fpr just for a quick test, or while idling hook up a bicycle pump and pump some air into the vac port and see if it raises if it holds it should be fine if it don't then swap the fpr. My always had no issues when idling but when in boost it only went up like 5psi.

 

[KBOOSE]

How would one reload the aem ems? And what hoses could be unhooked to cause a car to run lean

 

[97supramichael]

Vacuum hoses?

 

[grandporschegt]

have messed with the idle screw recently? if so your tps isnt calibrated properly and can cause alll sorts of weird shit.

 

[TonyN]

How would one reload the aem ems? And what hoses could be unhooked to cause a car to run lean

From your post it seem that you should stop messing with the car and take it to a tuner, all things point to the fact that you have either lost the tune or dont have a tune at all.

 

[KBOOSE]

I was told you dont just lose your tune what factors could cause this? I have a copy of my tune on my laptop im sure worst case senario i could just reload it i just dont know how.

 

[FLINTSTONESKID]

open up aem pro, click "ECU" at the top, click on "send new calibration", locate the map that you want to use, select it.....profit

 

[KBOOSE]

Does this seem right?

 

[FLINTSTONESKID]

im not sure what you are asking......

 

[Beau]

Yeah, this isn't really showing us much. Perhaps some logs?

 

[KBOOSE]

The fact that the 02 sensor readings as well as the Engine load readings are in red at idle. Could it be that my car was tuned in florida and now that i am in ny the atmospheric pressure and humidity is creating this problem?

 

[FLINTSTONESKID]

i gotta be honest with you buddy, at this point, a tuner is not merely and option, but a necessity. do yourself a favor and spend whatever you have to in order to get the car to a responsible tuner, or better yet, get him to you. i have said this a million times, you can have the best of everything in your car, but without a good tuner, its all worthless. im not sure there is anything else i can do for you and i dont want to put words in anyones mouth, but i would be willing to bet that any tuner, worth his weight, wouldnt give you any "suggestions" without actually seeing the car and/or logs, for fear of incurring damage.