Help Diagnose Please

[Chuck]

Hi Guys...Im a Polo GTI (9n3) owner but am posting this for a friend...any help would be very much appreciated




Car: 2002 VW Golf 1.6


Owner: Alec R


Definition of Problem
1. Stalling
Symptom: Engine cuts-out (stalls)
Resolution: Wait 1-3 minutes, and will restart. It struggles initially, then runs
clean.
Frequency: 1-2 times per week. No discernable pattern. Most times, occurs early in drive (2-5 minutes from starting engine). However, it has occurred after running for 30 minutes. Has happened in warm and cold weather, also wet and dry.

2. Over-revving
Symptom: Engine over-revs. Revs jump up to 4-5,000 RPM, and sits there.
This mostly happens while I am driving, and I can feel the car trying to accelerate, so that I have to push clutch in.
Resolution: Turn engine off - wait 10-20 seconds and restart the engine. Car then runs smoothly.
Frequency: 1-2 times per week.
No discernable pattern. Most times, occurs early in drive (2-5 minutes from starting
engine). However, it has occurred after running for 30 minutes. It mostly happens on way to work (morning), though it has happened at other times also.


Notes
Occasionally get fluctuations in engine revs (like a pulsing) at idle.
The engine runs very strong most of the time – no problems.

[geoff_gti]

Try a throttle body clean & reset. Typically if they fault, idle seems to jump up to about 1200-1400rpm & will fluctuate, but hey...nothing to stop if from dropping too low and stalling either! Jumping up to 4-5k is a bit of a worry though!! TB sensor is prone to faulting, turning engine off and restarting seems to be a quick fix but it will keep happening as your mate has found...

Seems to be topic of the week

[asdfghjkl32]

Could it be the oxygen sensor problem??

[balkanac]

Get the car scanned. This should be the first thing to try when diagnosing weird issues like this one. Im sure it has codes stored in the ECU

[DesmoFan]

Hey

ust a quick update. Took the car to Quattro motors in Brswood. Really nice people.
The plugged in VAGCOM and diagnosed a faulty temp sensor. Replaced it for $95, and running like a dream now.
Thanks for all the help.

Regards

[jackjroadster]

Hey

ust a quick update. Took the car to Quattro motors in Brswood. Really nice people.
The plugged in VAGCOM and diagnosed a faulty temp sensor. Replaced it for $95, and running like a dream now.
Thanks for all the help.

Regards

Hi there, my car was also diagnosed with faulty temp sensor and I had fixed last week. After four days the same problem reoccurred again. I tried to check the temp sensor and it's doing okay. Could it be the oxygen sensor? I've read some similar post on Volkswagen repair.