MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: DurinsBane117 on October 18, 2023, 07:31:59 pm

Title: Intermittent Cold start issue
Post by: DurinsBane117 on October 18, 2023, 07:31:59 pm

Been having intermittent issues with cold starts lately. Issue only happens on cold start if the csr has been running it will start up with no issues. I've taken a video of the cold start, please see the link below:

i=co02zAJisePxjxuN

So far I've replaced:
- Coils and spark plugs
- Fuel filter
- 4x injectors
- battery
- cam follower
- cleaned MAF and IAT sensors

Scaned the car which shows no fault codes.

Car has had a inlet clean and has a stage 1 map.

Title: Re: Intermittent Cold start issue
Post by: pudding on October 20, 2023, 10:35:28 pm

Lift pump or HPFP not building pressure quickly enough.

Title: Re: Intermittent Cold start issue
Post by: Marj on October 22, 2023, 05:30:12 pm

I’ve got the exact same issue, have you found out what it is yet?