All Things Mk5 > How to Guides / Troubleshooting

Lumpy Idle issue

<< < (2/3) > >>

r5gtt:
Easiest way to check the pcv is to pull the dip stick up not out and if idle goes up and down its working fine, if it's remains stable it's failed so why you removed I dint know.
There's a pipe next to the hpfp that could be damaged?.  Pull it out it pops off and check it.

ChazGTI:

--- Quote from: Ricky123 on April 25, 2016, 12:06:57 am ---Injector/s? Check them using vcds

Excessive carbon build up? Only one way to find out really..

Maf? Unplug it and see if there's any change

--- End quote ---

I'll have a look at the injectors then.
Unplugging MAF makes it run like crap so its not that.

Gonna try some wynn's engine flush and change the oil (obviously), not that oil change is due.

ChazGTI:

--- Quote from: r5gtt on April 25, 2016, 08:27:12 pm ---Check your hpfp cam follower as this is a common cause for this sort of behaviour especially when it's about had its life span and worn down to its limit.

--- End quote ---

Not sure if I said so, but already replaced that recently. Old one needed changing, but wasn't that bad really.

ChazGTI:

--- Quote from: r5gtt on April 30, 2016, 08:08:57 am ---Easiest way to check the pcv is to pull the dip stick up not out and if idle goes up and down its working fine, if it's remains stable it's failed so why you removed I dint know.
There's a pipe next to the hpfp that could be damaged?.  Pull it out it pops off and check it.

--- End quote ---

Yeah I've checked the PCV thoroughly already. Its a later revision luckily. Just happened to have a spare gasket for it, so replaced it for peace of mind as the old one was looking a bit worn out.

The pipe by the hpfp is good.

r5gtt:
The only other things would be as suggested your injectors or excessive carbon build up in the head which can only be determined via a borescope or removing the inlet manifold for a visual check. Sorry I can't help any further.

Navigation

[0] Message Index

[#] Next page

[*] Previous page