My car is a Vectra C 2004 Z18XE (1.8 Petrol) with 72k miles.
Can anyone help narrow down the following problem:
Car runs badly & misfires-especially when cold and at idle, hesitates & does not want to take the throttle unless pressed nearly all the way down. Better at high revs, but still lumpy.
Running OP-COM gives the following error codes: P0170-11 Fuel Trim System Rich
Here is the actual log.
OP-COM - PC based diagnostic tool
OP-COM - CAN Communicaton Window> 2004|Vectra-C / Signum|Engine|Z 18 XE
Software version number: 6586085115
Motor type: Z18XE
Hardware key number: ’’’’’’’’’’
System description: SIEM 0100
Type approval number: S03010
Hardware manufacturer system name: SIMTEC71.5
Total number of fault codes: 1
P0170 - Fuel Trim System Rich
(11) - Present
What would cause this error and how can I narrow it down - Some of these?
or would I have more fault codes in OP-COM?
Mass Air Flow Sensor
Lambda O2 Sensor
Spark Plugs and or Coil Pack
EGR (How can I tell if my car has one?)
Thanks in advance,