Hi all. I have been reading through the forum for over a week now but still unsure as to what to do....

Basically I have an issue with kangerooing...the cell light is on and the diagnosis machine said 'cat below threshold and lean. This was when the car had a decat with o2 sensor present, I have now put the cat back on with the o2 sensor still present but the cell light is still on and says the same.
Basically the car is sometimes OK but frequently drives really bad.
When ignition turn on the car is OK for a few minutes then soon after the idle fluctuations up and down then when driven the car is very jumpy below 2k rpm but is OK over this rpm and in higher gears.
I thought putting the cat back in with sensor present would sort it out..but no....please help lads its driving me crazy and only owned her a couple of weeks and haven't had a chance to enjoy it yet!
I have considered that the o2 sensor in the cat needs replacing...but how can I tell that its not the other o2 sensor in the manifold instead...? Don't want to have to replace both. I read on here that the o2 sensor in the cat is only the secondary sensor and shouldnt create a cell error light or kangerooing issues...

Please help guys...Thank you

Rich

 

I think its the MAP sensor, give it a "MAP WACK"

 

Even though the code reads an error associated with the cat and being lean?

 

What is the OBD code that you are getting?

 

Not sure of the exact code but as above it said cat below threshold and lean.. ? got today off work but don't know which sensor if required I need to buy and fit.

 

Whereabouts are you?

 

In Portsmouth

 

Is this where the car jumps about like you are kicking the accelerator? Mine does it sometimes and also feels like its not full throttle when it is. I've read up that its the map sensor. Take the map sensor of and hit it off the ground is what tinternet says

 

Exactly what it does mate.
I'll give it a go thanks. But why would the odb read there is an issue with the cat and lean? And the map doesn't produce a cell light I don't think..?

 

Disconnect the battery for 5 minutes to re-set the ECU, re-connect the battery then start the car and let it idle until the cooling fan has come on three times. When the fan has done it's 3 cycles take it out for a spirited drive so the ECU 'learns' your driving style. It should feel better then, if not then you have either major heat soak or possibly a faulty component.