TD5 rough running.

**maxperformance** · 26th February 2021, 04:24 PM

I got and sorted exactly the same symptoms on my first TD5 Auto D2 01 135k kms but without MIL light on (it might be a quick flash light of something at that time that I couldn't recall).
Do you have this issue happened constantly at a certain revs range (say between 2500 - 3000rpm)?

**Tins** · 26th February 2021, 05:25 PM

Originally Posted by maxperformance

Do you have this issue happened constantly at a certain revs range (say between 2500 - 3000rpm)?

No. In general it runs just fine. Then this bobs up. I just gave it a good drive and it didn't happen. But it happened twice earlier today. I am going to completely rewire the CPS to eliminate that.

**maxperformance** · 26th February 2021, 09:08 PM

I remember that the issue would not happen unless I went up hills and push floor the pedal then it would surge/hiccup constantly at around 2700 - 2800 revs and would not go past that revs, and felt lost power too (which means with a heavy load or very steep hill it will stall). While on normal roads it would drive totally fine. Turned out a bad MAF sensor and a wrong position of turbo waste gate rod.
But it seems your issue is a bit different. Hopefully you can sort it out quick.

Originally Posted by Tins

No. In general it runs just fine. Then this bobs up. I just gave it a good drive and it didn't happen. But it happened twice earlier today. I am going to completely rewire the CPS to eliminate that.

**Blknight.aus** · 26th February 2021, 10:48 PM

can happen if the purge valve on the LP side is stuffed open.

**Tins** · 26th February 2021, 10:51 PM

Originally Posted by Blknight.aus

can happen if the purge valve on the LP side is stuffed open.

Hmm, another curve ball from the expert pitcher. Thanks, Dave, I think. How would I test for such a thing??

**Blknight.aus** · 27th February 2021, 07:30 AM

Originally Posted by Tins

Hmm, another curve ball from the expert pitcher. Thanks, Dave, I think. How would I test for such a thing??

with difficulty,

you can sometimes hear it on the pump prime sequence if theres air in the system, it just sounds wrong, another way is a comparative listen for the pump loading up.

**Tins** · 27th February 2021, 10:21 AM

Originally Posted by Blknight.aus

with difficulty,

you can sometimes hear it on the pump prime sequence if theres air in the system, it just sounds wrong, another way is a comparative listen for the pump loading up.

Great. I'm a little hard of hearing these days.

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