Paris6876
Thursday 24th October 2013, 23:50
Hi guys
Been a while since I was last here as I've had a stint away with work.
Anyhow, could really do with your collective wisdom on an issue with emissions, lambdas and general running on my V70 T5 late 2001 model.
Have bought and fitted one of Graeme Welch's 200 cell downpipes, which I have to say is a very beautifully crafted item. My Indy were very impressed and it fitted really easily. I did this as I was getting the engine management light on frequently (no loss of power, but a very restricted flat feeling, like driving into a sting headwind at 60 - 70). My Indy advised code was suggesting a 3 way cat failure. Initially, we changed the MAF, but this made no difference. So, as I love the car, I wanted to get a little more performance out of it and used this as an excuse to shell out on one of Graeme's masterpieces. All good in that respect and highly recommended.
Now, here's the issue: the engine management light has been on again for a few weeks with no significant loss of power, but my 'fluffily' feeling flat spot is back and what's worse, the car has just gone in for its MOT and failed alarmingly on emissions. NB- I Have a friendly tester who knew to do emissions with the sports cat warm. There's no fault with Graeme's work here either! What I got back in the emissions report were readings varying between 400 and 800! So... All over the shop! My friendly tester ran his diagnostics and reckons he's narrowing it down to a 'bank 1' oxygen sensor ie the pre-cat lambda.
What I would like anyone's advice on is:
A. Does this sound like it might be where the issue lies? Or... Have I overlooked something?
B. should I suck it up and change both front and rear lambdas in a last ditch attempt to sort this once and for all?
C. When it comes to buying replacement lambdas for a P2 T5 what's the forum's experience / advice: is there a good aftermarket supplier I should order from, or is it better to pay extra and get OE from my local dealership? I've read that the cheapo ones often cause issues.
Would really appreciate the benefit of anyone's experience and the forums collective wisdom and advice.
Cheers
Been a while since I was last here as I've had a stint away with work.
Anyhow, could really do with your collective wisdom on an issue with emissions, lambdas and general running on my V70 T5 late 2001 model.
Have bought and fitted one of Graeme Welch's 200 cell downpipes, which I have to say is a very beautifully crafted item. My Indy were very impressed and it fitted really easily. I did this as I was getting the engine management light on frequently (no loss of power, but a very restricted flat feeling, like driving into a sting headwind at 60 - 70). My Indy advised code was suggesting a 3 way cat failure. Initially, we changed the MAF, but this made no difference. So, as I love the car, I wanted to get a little more performance out of it and used this as an excuse to shell out on one of Graeme's masterpieces. All good in that respect and highly recommended.
Now, here's the issue: the engine management light has been on again for a few weeks with no significant loss of power, but my 'fluffily' feeling flat spot is back and what's worse, the car has just gone in for its MOT and failed alarmingly on emissions. NB- I Have a friendly tester who knew to do emissions with the sports cat warm. There's no fault with Graeme's work here either! What I got back in the emissions report were readings varying between 400 and 800! So... All over the shop! My friendly tester ran his diagnostics and reckons he's narrowing it down to a 'bank 1' oxygen sensor ie the pre-cat lambda.
What I would like anyone's advice on is:
A. Does this sound like it might be where the issue lies? Or... Have I overlooked something?
B. should I suck it up and change both front and rear lambdas in a last ditch attempt to sort this once and for all?
C. When it comes to buying replacement lambdas for a P2 T5 what's the forum's experience / advice: is there a good aftermarket supplier I should order from, or is it better to pay extra and get OE from my local dealership? I've read that the cheapo ones often cause issues.
Would really appreciate the benefit of anyone's experience and the forums collective wisdom and advice.
Cheers