Stuttering - hesitation

[Rivva]

had revo installed recentley and since then when booting and some times when driving steady u can feel it hesitate and sometimes hold back and judder and stutter you can feel it alot when revving high in say second and it kinda jumps back, could this be anything to do with the maf sensor

any help appreciated
thanks

 

[Dormouse]

had revo installed recentley and since then when booting and some times when driving steady u can feel it hesitate and sometimes hold back and judder and stutter you can feel it alot when revving high in say second and it kinda jumps back, could this be anything to do with the maf sensor

any help appreciated
thanks

LOL 'recently'

Yes, it could well be the MAF. You really need to do some logging really.

I would check out your airbox / filter too (maske sure it's cleam and not like a sandbox...)

Now if it was an ibiza....well....I have learn a whole load of stuff about boost problems on them in the last 24H

Dor.

 

[Rivva]

LOL 'recently'

Yes, it could well be the MAF. You really need to do some logging really.

I would check out your airbox / filter too (maske sure it's cleam and not like a sandbox...)

Now if it was an ibiza....well....I have learn a whole load of stuff about boost problems on them in the last 24H

Dor.

LOL "learned"

hehe well running the dynatwist and all seems fine what is the maf exactly is it the big bulk on top of the pipe where the old airbox/dynatwist is and its like a plug thing?

 

[RobLeon20V]

£5 it's the MAF
MAF is the thing with the connector you connected your dynatwist to

 

[Rivva]

yeah unplugged it and plugged it back in for the fun of it, well in another thread ive been saying how my dv pipe blew off as it wasnt tightened enough, so a tenner (£10) says i hadnt tightened it enough and there was an air leak (well i hope so) ive put my original air box on and bosch dv all tightened etc unplugged and plugged in my maf so now all it needs is a quick spin will update you later


p.s ill take the money throught paypal thnx roflmao!!

 

[Rivva]

right got the standard air filter on and the bosch dv on so everything is standard, so i set of to goto the local sainsburys to check tyre pressure with revo OFF! gets there all ok smooth power delivery all well and good, i turn revo ON via sps2 set off "fooking flew" then after 2 minutes it started juddering when puttin the power down and jumping back occasionally is this my maf then as its really pissing me off but only does it when revos turned on and has only started since then (had revo 3 days) its nothing to do with my dv as ive had all 3 on and does it with them all dont think its to do with my dynatwist as it does it with the standard air box on but it only does it when revo'd!!!argghhh help please!

 

[Rivva]

right been reading up about the maf sensor so decide to give it a run with it unplugged! ran it down the dual carriage way with it plugged in until it jumped back which it did several times so i pulled up unplugged it esp light came on and oil light flashed a few times started her up pulled out n floored it it jumped back once again and then when letting of the throttle i heard the (bosch DV) whooosh, then i thought omg ive split the dv

"well on my other thread i posted about last night when out the dv pipe flew of and the jubilee clip flew away so i had to drive home at 20mph as when it let the air out it would stall well i pulled over looked under bonnet and it had done the same again except it would run as the maf was not plugged in therefore it was not sensing the leak (i think) the reason it blew of last night was because i hadnt tightnened it enough well when changing everything back to stock today i tightened the DV as hard as i could and i mean hard so how the hell has it blown off again !! FF'S THIS IS REALLY PI SING ME OFF!!!

anyway i dont think its the maf as i ran with it unplugged and it was still jumping back! what else could this be loose pipe? it mainley happens when booting it in 2nd at high revs it will jump back quite sharply and mainley when say coming up to a roundabout in 3rd slowing down to about 30 in 3rd then putting footdown u can feel it hesitate and jerk all the way up the revs


please can somebody point me in the right direction

thanks!

 

[Rivva]

mm after reading up a lot, i hear it is most likely to be the maf sensor, or could be n75 valve?? but ive been thinking seems as it only happens when revos on means that theres more pressure coming through the pipes than normal so maybe some pipework which is only a tiny bit loose with it having that little bit more pressure coming through maybe thats whats leaking! so could you guys give me any pointers of which main pipes to check, (if i ever get a reply)...

 

[Rivva]

Anybody?....

 

[Rivva]

right the pipe running up from the intercooler into the engine (left side) was coming away so i pushed back up and tightened as much as i could, went for a spin still stuttered pulled over it had started coming away again and underneath is like a grease and even when tightened as much as poss its still able to be moved by hand (not much) well was inspecting the n75 valve earlier and theres like a few smallish pipe/tubes all bracketed together by some black plastic clips well one of these pipes push into another and they seem easy to pull apart no clip on them or anything and when stuttering you can hear sucking coming from that area (no not the air filter) and it sucks loud then jumps and u can hear only slightley but you can hear it, the wastegate? pleaaaase help!?!?!?!

 

[cordobabrendy]

wheen i had my LC chipped it stuttered also, felt like waves of wind buffeting the car when accleerating hard, turned out that when i changed my n75 to a j variant (n75j) that cured it, i think the standard one isnt up to the job of the extra boost so will work fine on stock mode but have bother with the higher boost. less than 40 quid iirc.

 

[Rivva]

OMG I GOT A REPLY!

ok mate thanks for that so i need to uprate to a n75 j? okey dokey you dont know where i could get 1 do you?

 

[cordobabrendy]

grant at westec is where i got mine.

not long in the pc tonight, would have answered earlier if id known!!

 

[Rivva]

ok mate cheers will go have a loook now! any other ideas of wt it could be, nothing to do with the intercooler pipe?

 

[cordobabrendy]

dont think so,
it happened to me when using 2nd 3rd and 4th gears, never really accelerated hard after that to find out, i replaced the panel filter for a green perfomance ine and forge dv, neither cured it til i replaced the n75, boost comes in now around 2500 and runs right round to well over 6k though i change up at 6. for around 41 quid delivered its not an expensive mod anyway.
http://www.westecperformance.co.uk/acatalog/Misc_Engine.html , second item.

 

[Rivva]

yep checked it out, what if it isnt that tho i take it im stuck with an n75j lol ok fingers crossed ill order one soon i think! im running forge dv had the dynatwist on but changed to air filter to see if that was wt caused it and changed bk to bosch dv but still did it, above where i explained about the pipes are they meant to be like that and what are they, they are only small (like the vaccum pipe wt goes onto dv) ??

 

[tackleberry]

did the n75j cure the problem as i'm having exactly yhe same problem

 

[barryg]

did the n75j cure the problem as i'm having exactly yhe same problem

Having same problem too did it cure it, can these upgraded valves be bought in dealers?? anybody got a part no.

 

[DPJ]

If you're following this thread, Cordobabrendy has had huge trouble with Revo and N75J and has changed back to an N75F.

 

[m0rk]

Erm, he's had huge problems with the N75J, not 'Revo' - you would have the same problem no matter what map it was because the map won't expect the wrong valve.