Just fitted a magnex downpipe and the fuel comsumption has gone thru the roof !!
Its on a 93 wrx, rest of exhaust is scorpion.
Any ideas why this is happening ?

 

Lambda sensor? Driving it harder?

[Edited by john banks - 2/16/2003 7:27:54 PM]

 

As John suggests, have you checked the Lmabda sensor is correctly plugged back in..

I believe a disconnected one would increase the fuel consumption.

JGM

 

He shouldn't have a lambda problem on a 93wrx after d/p fitting should he?, isn't it just the later cars with the lambda in the d/p?

 

As jameswrx says the lambda is not on the downpipe on a 93.
I have used about half a tank of juice for only 20 odd miles.
The car is running ok and the cel is not on.

 

Half a tank in 20 miles

You sure you haven't got a leak somewhere?, if the cars running ok and your using that much juice sounds favourite.

 

I have just fitted a turbo back Magnex on my STi V3, down pipe, decat centre, back box, and my consumption is realy worse compared to the STi system, noticeably so, not half a tank /20 miles bad, but much worse, AND I was driving sensibly(it's my age). Not at all sure if it goes any better either, but great noise!
Going to PE to have a EcuTek fitted, Mervyn says he will sort it all out (overboost)and give me 315+ bhp. It will be worth the fuel then!
Graham

 

Since my downpipe went on the fuel consumption when I used the loud
pedal lots is worse... but if I drive balancing a coffee on the dashboard the consumption is better..

Although the coffee hasn't last a full tank of fuel yet to be sure and confirm this...

do you have any fault codes?

JGM