Check Engine light after New Timing Belt??

Hi guys, I wonder what you are going to say about this one, because I have not clue what to think.

The Story:
The first time I changed the timing belt (6 months ago) and I didn't notice any change in car's performance, but someone pointed out to me that it was smoking too much. So I decided that the first guy (who is not a LR mechanic) didn't do proper job changing the belt and gave it to the second guy (LR mechanic).
The second guy said that the belt was two teeth off and he reset it to the proper position. or something was off (a little was lost in translation from Indonesian).

The Results:
- Now my Check Engine light comes on between 1200-2000 RPM. Anywhere outside of that range no Check Engine light.

- my Tacho that was jumpy or it didn't work previously works perfectly now (hence I know the rpm) (I checked the alternator cable and all before to no avail).

- Wow, the car is so much quicker now, but little more knocking I think.

The car is Jap import TDI 300 EDC. I do have a bigger intercooler and a tunit chip, (for EDC) which were not making huge difference before, but now, it feels like a rocket ship.

Any thoughts?? Who did a good job? (and if you ask me if they used pins to change the timing belt, I don't know)

Thanks!!

sounds like your timing was retarded after first belt change and now a little advanced after second, both of which wouldnt effect engine light

Would you suggest to correct it or little advanced timing is OK?
I read here that some guys experimented with that. Advance tdi timing... wow - Defender Source

depends on how much knock there is ,engine light is another issue

jamesmartin said:

depends on how much knock there is ,engine light is another issue

Click to expand...

Not much knock, just a bit, after the weekend I already got used to it.

What about the Check Engine light? its kind of weird that it only goes on in tight RPM range. Could it be fuel supply issue? there is no loss of power or anything, car acts normally.

Cheers much mate,

I don't believe the engine light has anything to do with the cambelt changes.

I reckon it's the accelerator potentiometer and it's just starting to fail.

If you can imagine a radio volume control, when they get a bit older the control gets noisy as you turn it. Well that's the same with the accelerator pedal on the autobox Landy. As they get older the tracks wear out or get dirty. You may find that a good cleaning will cure the problem or you might have to find another one.

Good luck

Dave

It could in fact be a coincidence, but it would be very timely, as it just started after timing belt change. But maybe there are some new engine characteristic t exposed the ware in the potentiometer.
I will check that.