Fouth gear 5k rpm flat spot AUQ stage 1

[chrispcupre]

I have noticed recently when accelerating hard in 3rd and again in 4th but hitting about 5k rpm I get a massive flat spot only in 4th gear but if I try going from low rpm in 4th revving through to 5th it's fine weird ,might book it in at r tech for dyno run and smoke test any one else get this problem.stage 1 forge 008 99ron fuel green panel cobra cat back


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[Cupra Ross]

I have noticed recently when accelerating hard in 3rd and again in 4th but hitting about 5k rpm I get a massive flat spot only in 4th gear but if I try going from low rpm in 4th revving through to 5th it's fine weird ,might book it in at r tech for dyno run and smoke test any one else get this problem.stage 1 forge 008 99ron fuel green panel cobra cat back


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VCDS logs would help to pinpoint the reason for it. Sticky dump valve or temperature related timing pull would be my bet without seeing the logs. Get a bigger downpipe and ditch the cat, that'll keep the temperatures down.

 

[ibizacupra]

what maps on there currently
anything been touched on the engine recently?

 

[gavin.garner.12]

Faulty maf

 

[chrispcupre]

I have a r tech custom stage 1 and as far as I know the maff is original and done 106k so it's possibly fudged


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[paulos44]

As a matter of interest,what power figures you getting as i am going there for a Stage 2 after xmas ?

 

[chrispcupre]

As a matter of interest,what power figures you getting as i am going there for a Stage 2 after xmas ?

208bhp 260 lbft


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[gavin.garner.12]

Tbh I recently changed my maf after having almost the exact symptoms, it drove perfectly apart from between 4-5k, had it on vag com and nothing at all showed up, maf figures even looked normal, I think before they fail they read true but don't adjust quick enough under full load

 

[gavin.garner.12]

Try unplugging the maf and see how it affects it

 

[chrispcupre]

I'll give it a try


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[chrispcupre]

Tbh I recently changed my maf after having almost the exact symptoms, it drove perfectly apart from between 4-5k, had it on vag com and nothing at all showed up, maf figures even looked normal, I think before they fail they read true but don't adjust quick enough under full load

I fitted a new bosch maff and it's sorted the flat spot and feels strong right through all the gears


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[gavin.garner.12]

Nice one, glad it was a simple fix