Pulsing engine when cold

[LukeClark]

Hey, yes it was a faulty EGR valve I believe. Attached a blanking plate to test it and it ran like a Swiss watch. Bought a replacement valve and hopefully that’ll cure it. Could leave the plate in but don’t want to affect emissions. Will just keep on top of it to keep it clean.

I also checked my injectors for tightness after I knew it was the EGR, 3 of the 4 were loose(ish) so I tightened them up. Seems a common problem.

As for additive, Lucas injector cleaner is the best one I know of, my thoughts are they can’t hurt even if they aren’t  the miracle cure they advertise. The reviews for Lucas were pretty incredible though that’s why I gave it a punt. Hope that helps.

[Zion]

They only test diesels visually for smoke. As I've learned myself, the EGR blank improves running and there is no emissions fail. A few years ago, I thought like you that it would fail, but it doesn't make a jot of difference to the mot.

[jj9]

Good to know that blanking the EGR cured the problem!

Keeping on top of to keep it clean won't stop the inherent hesitation that the EGR causes at low RPM /speed, or stop the inlet manifold filling up with sooty sticky deposits though. 

You can lead a Horse to water.......  



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[paradox1001]

Hey, yes it was a faulty EGR valve I believe. Attached a blanking plate to test it and it ran like a Swiss watch. Bought a replacement valve and hopefully that’ll cure it. Could leave the plate in but don’t want to affect emissions. Will just keep on top of it to keep it clean.

I also checked my injectors for tightness after I knew it was the EGR, 3 of the 4 were loose(ish) so I tightened them up. Seems a common problem.

As for additive, Lucas injector cleaner is the best one I know of, my thoughts are they can’t hurt even if they aren’t  the miracle cure they advertise. The reviews for Lucas were pretty incredible though that’s why I gave it a punt. Hope that helps.

Thanks for the reply
An egr blank is on the to do list

It’s going to have to wait until the garage have had a look at the car and we have better weather and I’ve more time.