Okay managed to spend some time working through the list.
1. MAF cleaned and tested with multi-meter - think it is okay - I'm seeing a reading fluctuating between 0.85v to 0.9v on idle. There is a perm 12v source to the MAF as well.
2. Took of TPS and sprayed electrical contact cleaner on it.
3. Carried out ECU reset procedure and read the basic settings, after driving it is a little better on idle.
4. Took all my vacuum lines off, inc. carbon canister and inspected carefully for cracks. No problems there.
5. Plugged in my OBD11 device and monitored the live readouts (there are no engine fault codes):
- I found my idle speed sits mostly at 680 rpm but drops to 640 and up to 720 rpm every couple of seconds.
- Coolant temp is good - steady 87 degrees
- Lambda value fluctuates around 1.0 which I think it normal.
Things I am not sure about
:
- Injector timing is 3.3 to 3.7ms. I've seen references it should be around 1.5ms reading around forums?
- The EGR temp jumps between 182 degrees to 217 degrees centigrade every 1 second (I didn't think I had an EGR valve and maybe this is coming from the O2 sensor?)
- The timing should be +-1 degree of 6.0. Mine jumps 4.5 to 6.8
So I think maybe something is wrong, although it did get better following the ECU reset procedure. Just thinking out aloud
- if the temps are coming from the o2 sensor perhaps it is over fuelling due to a bad injector, which probably points to why it's backing off the timing to 4.5 degrees every second too.
- Motor mounts are worn and letting too much vibration through. If the numbers above look normally this could be a possibility.
Any other ideas
Thanks,
Matt
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