Seriously Bad MPG
19 March 2009, 01:40 AM
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Seriously Bad MPG
Hi, i have recently bought a 92 WRX Saloon. Standard engine components, bar, straight through 3" Cat Back. Forge Dump Valve and Chipped ECU so maybe around 260-270BHP.
I am getting about 12 MPG running on V-Power (120 Miles to a tank)
. My freind has a later STI (98ish) with around 320 BHP and hes getting around 20. I drive the car pretty hard but so does my mate.
Sometimes makes a 'bop' sound when off the throttle like theres unburnt fuel somewhere. Is this overfueling?
Did an ECU Check and everything is ok - no faults showing.
If driven hard is this normal? My dad seems to think it is as he had intergrale's back in the day and was getting 8 MPG!!!
Im going to buy a Decat, is this going to worsten the situation?
P.S. i put the chip in and its no different so thats that ruled out.
Any Help Gratefully Recieved
Thanks Dan (sorry about the spelling)
I am getting about 12 MPG running on V-Power (120 Miles to a tank)
. My freind has a later STI (98ish) with around 320 BHP and hes getting around 20. I drive the car pretty hard but so does my mate. Sometimes makes a 'bop' sound when off the throttle like theres unburnt fuel somewhere. Is this overfueling?
Did an ECU Check and everything is ok - no faults showing.If driven hard is this normal? My dad seems to think it is as he had intergrale's back in the day and was getting 8 MPG!!!
Im going to buy a Decat, is this going to worsten the situation?
P.S. i put the chip in and its no different so thats that ruled out.
Any Help Gratefully Recieved
Thanks Dan (sorry about the spelling)
Last edited by dan11223344; 19 March 2009 at 01:42 AM.
19 March 2009, 11:41 PM
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dump valve sounds like a good idea, i have a standard one in the post. Does the fact that ive done an engine check rule out the lambda sensor, as no faults were showing? Thanks for the quick reply Simon. Dan
20 March 2009, 12:23 AM
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21 March 2009, 01:15 AM
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Just changed the Air Filter and secured it better, tightend all the jubilee clips, fitted the standard BOV, car must have nearly doubled in MPG. Thanks for all your help, shal i change the Lambda aswell, for good measure? Thanks Dan
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