Back to Square 1 no idea whats wrong

[ChrisCurzon]

hey guy

not sure if any one seen my other help thread but just on same problem what can cause over fueling and need to narrow it down to what could be problem.

i know Map,Maf and Lambda can changed MAF allready so not that what ellse can cause the problem?

cheers

 

[M1KEH]

Worn injectors can also be a problem although unlikely unless your on a high milage car.

 

[ChrisCurzon]

na only done 60k

so if its not map and had maf changed possible the lambda sensors?

can you not log lambda's on vag com?

 

[Dan.Payne]

Could have wrong plugs or warn out plugs? Revo Timing setting?

 

[ChrisCurzon]

bought new coil packs and denso ik22 about a month ago.

revo timming has been messed with was on 9 now on 2 but that garage fault vag com did show no timming pull at all when was on 9.

 

[Neel-Cupra]

ive got the same problem mate, just had a stage 2 revo done then the following codes came up:

17535 - Long term fuel trim mult. Bank 1 system too rich

17658 - Fuel level too low

 

[Neel-Cupra]

Could have wrong plugs or warn out plugs? Revo Timing setting?

saying that i did have new plugs put in, NGK PFR6Qs which only have 1 pin at the top .. boost is set to 8 timming 9 with no timming pull

 

[ChrisCurzon]

iv had this problem for ages but not actually got a fault code on mine for some reason just know its over fuelling from logs.

what have you done upto now to try fix it?

 

[PhilW]

What are your fuel trims? Look on block 032 i think it is, two sets of %'s.

 

[ChrisCurzon]

not logged that will do it later.

you know what block can log lambda on phil?

 

[Neel-Cupra]

ive got the car booked in on monday to be looked at, but the maf reading is ok, changed it in august, but could either be the lamda sensor or the spark plugs as they only have one pin as oppose to three small ones ..

 

[ChrisCurzon]

think those as rigth spark plug to be honest.

you got any problems when driving or is it just fault codes you got?

 

[Neel-Cupra]

well the car drives ok, but i can tell it isn't like when it was mapped, but maybe thinking that as the fault codes keep coming back ..

 

[ChrisCurzon]

yea well least at as bad a mine then lol.

should be able to sort that out if aint having big problem

 

[ChrisCurzon]

What are your fuel trims? Look on block 032 i think it is, two sets of %'s.

do you mean log these as you would do any other block or just see what they are normaly.

what is this lokking at anyway?

 

[jivejester]

How much the ecu is having to compensate for correct fueling

+/-10% is within tolerance. Anything higher indicates you have a problem. First column shows the compensation @ idle. The second shows the compensation @ part throttle.

- numbers would indicate the car is possibly running rich and having to remove fueling.

+ numbers would indicate the car is possibly running lean and having to add fuel. (+ in the first column would indicate a vac leak, + in the second would indicate possible problems higher up the revs... maybe maf)

Best to reset/clear codes to reset 032, then drive around normally for a hour or two. Then check again.

 

[ChrisCurzon]

ah rigth cool thanks for that will check it later.

pritty sure its over fuelling though.

 

[jivejester]

Unless you have a wideband afr meter you can't possibly say that. The afr calculation spreadsheet based on injector duty is fairly inaccurate.

 

[ChrisCurzon]

no dont have wideband sensor i know its not accurate but was showing 9 on a/f ration which is way out even if not accurate. also injectors showing as over working under full load.

will check 032 later though see waht that says.

 

[jivejester]

The engine would cough it tits off @ 9's. What do the plugs look like?