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Author Topic: Fuel Trim Problem  (Read 3257 times)

Offline WadGTI

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Re: Fuel Trim Problem
« Reply #10 on: 17 October 2013, 11:24 »
Hi Folks,
Bit of an update. The car is pulling very strong and idleing good. This has been compared to my mates 150 which he could not keep up with me.

However, a chap from the Vwvortext forum who has been looking at some logs for me, has advised I have a major timing pull (up to 12 @5k revs).

The car itself, feels great which is strange. My MAF is still pulling low readings (as of yesterday), but again there is pently of power.

So far –
2 vac leaks found and sorted, fuel filter changed, spark plugs check (very good condition) and gapped to 0.32, themrostat changed, coolant temp sendor changed and MAF.

The o2 sensor has yet to changed, but its giving a reading from VAGCOM and the car passed an emmisions test last week.

I am at a loss with this now .

The car is booked in tomorrow for a belt and pump change as it may have jumped a tooth, but not sure as unable to verifiy the timing. The car is now @ 124k and I assume it was last changed around 60k.

The car runs great, but I am still getting this timing pull!!. Can anyone advise why a MAF would give low readings (just over 100 g/s on WOT pull) and not come up with a fault code.

The car was scanned again yesterday and I have no fault codes.

Any feedback would be brill.
Thanks
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Offline MoshiMoshi

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Re: Fuel Trim Problem
« Reply #11 on: 17 October 2013, 15:59 »
Quote from: WadGTI on 08 October 2013, 23:46
Hi folks,

Everytime I get rid of a fault another comes back in its place..really getting me down now  :sad:


Welcome to the club ;)
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I thought Volkswagens were supposed to be reliable?

Offline Wazzzer

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Re: Fuel Trim Problem
« Reply #12 on: 19 October 2013, 11:05 »
Timing pull can be caused by high intake temperatures
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Offline WadGTI

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Re: Fuel Trim Problem
« Reply #13 on: 19 October 2013, 11:44 »
Quote from: Wazzzer on 19 October 2013, 11:05
Timing pull can be caused by high intake temperatures

Thanks Wazzer, from what I can tell, the air temp is good on the intake as per vagcom.

However, after doing some more reading, using standard 95 ron fuel can cause timing pull. I use 95.

The sticker on the fuel cap says 95/98. Over the years, I have more or less used vpower, but I tried it in the golf when I first got it, but it was knocking. Went back to 95 and knocking went away.

I doubt the car has anything but 95 over 124k mileage. Changed my fuel filter recently and I am contemplating giving vpower another try.

Can anyone give any insight into this as other info suggests it could take 400+ miles of the car to adapt from 95 to 99. I'm not sure if 400 miles of knocking would be safe?

At least one bit of good new...timing belt and pump was changed yesterday  :smiley:
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