billc5

iTrader: (1)

On my C5 A4 Magnuson LS1 I've had split fuel trims for the past 2 years and cant find a cause

Is the fuel pressure the same across all the injectors and is a modification required?

Here is the picture of the proposed changes, but only if the problem is real or just my imagination.

http://www.auctiondepot.com/2/remote...agfuelrail.jpg

I can see that at WOT there may be a pressure drop from one side to the other, but at closed loop would a pressure difference still exist?

Would appreciate some experience with this subject.

Thank you.

onfire

iTrader: (17)

At light throttle a pressure delta does not exist. Not a fuel issue unless you have an injector issue. "Generally" bank to bank differences in ltrims are related to the front o2's. A leak in the exhaust pipe prior to the o2 sensor, bad o2 sensor, running long tube headers, etc. If the delta is small I wouldn't worry about it. 3 to 5 point difference would not worry me (left to right).

billc5

iTrader: (1)

I know that there is no leaks and that the O2 sensors are good. Have had 2 sets of Header with the same conditions. The delta is about 5/128 = or about 4%. Sometimes this difference is held into Open Loop.

The Onboard Wide Band AFR holds about where I want everywhere so I guess there is no material problem here. Perhaps I should be logging less and driving more (out of sight, out of mind).

I just wanted to know if the current fuel path had any part to play in this condition. and survey says---No.

Thanks for the responce.

618HAWK

iTrader: (361)

Not to but in on your thread here but what type of fuel rails are those? Did they come with your Magna Chrager, or from someone else?

billc5

iTrader: (1)

The fuel rails are part of the Magnachargers Kit.