Extremely Low MPG

[JackoR26]

Hi guys,

Recently had my car on the RR at RSTuning and Paul said that it was running a little lean and that the pre cat lambda was probably at fault. I decided to get a second hand one from Cliospares and fitted it at the weekend. Now my MPG has gone from around 28 on the onboard computer to 31, however the fuel has gone down considerably so i worked it out via a website and its saying 15.8. Now is this second hand lambda faulty, or does the ECU need to sort itself out? I used the onboard computer to get how many litres were in my tank, it used 8 litres of fuel to do 30 round town miles today and ive probably only done about 100 miles in total since fitting it.

Cheers

Jacko

 

[Addicted]

I'd of said it was faulty!

 

[JackoR26]

Thought it might be, just didnt know if it would take time to sort itself out.

Thanks mate

 

[:( clios]

Id give it more of a run and double check your numbers before you spend more TBH

 

[JackoR26]

Its got a warranty on it from Cliospares so i will ask them to replace it.

 

[Fred@BTM]

hence why you NEVER use 2nd hand lambda's, surprised cliospares even bother selling them!

£55 new give or take for a Bosch one, makes no sense getting a 2nd hander

you should be over 40mpg on the motorway at 65mph

 

[JackoR26]

Thanks Fred, think i will just go for a new one now.

 

[sideways danny]

2nd hand lambda.......jeeesssus

 

[JackoR26]

lol, ive learnt my lesson. Fitted a new one today which cost £84 and its running good again.

 

[P17 TOO]

Was it the pre cat lambda that was dead on my car Dan or the other one???

 

[sideways danny]

yeah, pre cat. Dead as a doornail