Cold start issues

Jun 3, 2020
5
0
Preston, UK
Hi all, I've been having problems with my 1.8t AUQ engine.
When cold, the engine will start, then stall and turn off, and will then start and run really rough until you pump the accelerator and it gets warm.
When warm it'll start first try without a problem, however I can't be revving my car at 6am to get it warm enough when leaving for work.
Other forum posts have pointed at possible SAI and coolant temp sensor faults, but I don't just want to throw money at it until its fixed, so any diagnostic help is welcome.
Thanks guys
 

Connor H

Active Member
Dec 19, 2019
981
484
Essex
id say try the coolant temp sensor first, but hard to advise as i have the same problem for 2 years. ever since i changed my fuel pump to begin with, have changed it 4 times since and the problem never went away.
 

mty12345

Active Member
Jun 17, 2011
3,426
311
bristol
Hi all, I've been having problems with my 1.8t AUQ engine.
When cold, the engine will start, then stall and turn off, and will then start and run really rough until you pump the accelerator and it gets warm.
When warm it'll start first try without a problem, however I can't be revving my car at 6am to get it warm enough when leaving for work.
Other forum posts have pointed at possible SAI and coolant temp sensor faults, but I don't just want to throw money at it until its fixed, so any diagnostic help is welcome.
Thanks guys

Check the hard plastic pipes that run to the SAI, are they fully plugged in and not split?
 
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