mpg

[davee 0]

lately my vr seems to be over fuelling even when your in traffic i can get a bad smell of petrol and on start up in the morning it does stink of petrol and i only seem to get about 22 mpg on the moter way thats down from 29 mpg on the same run

i recentlyhad a decat and stainles exhaust fitted would this have anything to do with it?

[UnitedMotorsport 55]

If you can smell petrol, check for fuel leaks!

[davee 0]

teres no leaks just the smell from the exhaust

ans bit smokey on start up

[rodney 17]

also check your Lambda and MAF are working as should be. Overfueling can be a sign of the Lambda especially

[UnitedMotorsport 55]

I bet its an OBD1?

[davee 0]

it is an obd1

have to check the lamda do they work ok on decats

[UnitedMotorsport 55]

From your average MPG figures you are using ~25% more fuel. Is it a coincedence that 25% is the maximum lambda trim?

Who fitted the cay bypass? did they refit the lambda probe?

On on OBD1 car, if the lambda sensor is missing the ECU automatically adds maxium fuel trim (25%)

[rodney 17]

[davee 0]

From your average MPG figures you are using ~25% more fuel. Is it a coincedence that 25% is the maximum lambda trim?

Who fitted the cay bypass? did they refit the lambda probe?

On on OBD1 car' date=' if the lambda sensor is missing the ECU automatically adds maxium fuel trim (25%)

[/quote']

il have to check it in the morning see if they put in back in

[muttley 0]

i'l check mine aswell coz mine is doing the same

[andynick69 0]

Just had a 80k service,on a run from brum to manchester!130 miles) mfa was showing 36-37 average. Well chuffed,a few 50 mph sections but generally 75-80 all way, didnt even change plugs as they were nt needed,watch this space, new schimmel ht leads and plugs next.