Trim mult Bank1 System too Lean ? ?

[Crazy_Titch]

Hey i got this fault on my car, When started from cold runs like bag of hammers for few mins. But when warm it runs better, but when i let off throttle and put it bac on it jutters abit then runs ok.. i had this code (Trim mult Bank1 System too Lean ) come up. saying it could be the lamda sensor. Any Ideas.

Also i have it booked into Seat for a proper diognostic, that should pin point the problem hopefully. Thanks Jamie

 

[Crazy_Titch]

any body ?

 

[Feel]

Sounds a bit like a coil pack, but that would give you a "system too rich", I think.

Possibly your MAF.

 

[Crazy_Titch]

Sorry i forgot to mention its the non turbo 1.8 20v

 

[ibizacupra]

lean could be the dreaded and common maf failure

 

[Crazy_Titch]

But if its the maf, how come its worse when colder. ? Thanks I thought possibly the lamda sensor.

 

[ibizacupra]

cold start only judder?
you need to log it to know and see whats going on...

misfire type judder?

 

[Crazy_Titch]

misfire mate

 

[ibizacupra]

coilpacks ?