All Things Mk5 > How to Guides / Troubleshooting
Help! Cold start issue
Beej:
did you ever cure this? I have been having similar symptoms since i bought the car 18 months ago, replacing parts as i go, iridium plugs, coil packs, cam follower (twice now) battery, pcv, fuel filter, and most recently, rfd and inlet clean (mapping changed to suit), and all this has done has made the starting more problematic! does anyone know what blocks i can monitor on vcds on the lpfp as i'm swaying towards that getting lazy, as once the car has started in the morning, it will start perfectly every time, unless sat for 8+hours.
ameet:
Just a thought, try starting without the Maf sensor unplugged?
Beej:
--- Quote from: ameet on March 06, 2016, 10:32:13 am ---Just a thought, try starting without the Maf sensor unplugged?
--- End quote ---
do you mean starting with the maf unplugged?
Beej:
my thoughts as to why i'm thinking it the lpfp is because if there is a leaking check valve in the intank pump, then that would be leaking fuel pressure from the lines back into the tank, which then in turn is taking longer for the pump to build pressure.
Once the car has been started first in the morning and ran for at least a few mins, it will start perfectly every time until it sat without running for 8+ hours.
The lpfp does prime when opening the door, so i know it is still working, just not sure how well
JUNNYAK47:
No, didnt get it sorted. Iv changed everything and had VCDS plugged in. no stored codes. only thing I havnt checked is the lpfp. How do you know if this is priming as I dont here anything when I open my door
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version