Engine misfiring after cam-belt repair - help please!
Please help if you can: At the beginning of December my cam-belt slipped resulting in a repair needing done. I got auto-lusso to collect the striken car and £1200 later (new cam-belt, aux drive belt, other repair work, water pump etc), I got the car back just before Christmas.
Since then, I have only driven around 150 miles and guess what: MCSF warnings. Checked the codes today and they are as follows:
P0 300 Multiple cylinder misfire
PO 301 Cylinder 1 misfire
PO 303 Cylinder 3 misfire
PO 159 Lambda sensor bank 2 slow response (post cat).
The car started being a bit stuttery under power, when cold and at low revs; this is when the MCSF's started. I have stopped driving the car, as I am concerned about overheating the CAT.
The car is a 156 2.0 jts selespeed ti (54 plate; 60k miles).
My questions are as follows:
1. Could the cam-belt repair have contributed to the fault codes, as I surely have some come-back if they are linked.
2. If this is coincidental and I just have the worse luck; then what is causing the problem? Part of the cam-belt repair included 4 new NGK plugs.
I had a bit of a misfire earlier in 2011, and I replaced the coil pack on no.3, and changed the plugs (did not get the PO 159 on this occassion) - this appeared to have sorted the problem. Is it likley that less than 6 months old, this new coil on number 3 would fail again? I will swap the coils around tommorow and see if the codes change from cylider to cylinder.
I am trying hard not to get disheartened as I want to keep the car - but as things stand, I can't take much more hassle and expence. Any help would greatly be appreciated.