Cutting Out When Shifting At Full Throttle

[R33ram]

hey guys,

just abit of help on why when i put my foot down full throttle it goes great in any gear but between gear changes like from from (first to second gear) it goes from say shifting at 5500/5800 and cuts out like for 1 sec to 4900rpm and picks up again...Does it most times and when it doesnt just wheelspins like crazy...Ive got new coil packs YJ and ive tryed the spark plug gap thought it might be jumping the spark and that but nothing....only does it through shifting gears at full throttle and hardly cuts out at all when just putting ya foot down in any gear..

thought might be afm but its just through gear changes.

any ideas.....

Edited July 22, 2012 by R33ram

[DVS JEZ]

Stock ecu?

[R33ram]

power fc and tuned..aftermarket bov plum back..

Edited July 23, 2012 by R33ram

[scotty nm35]

What intake are you using? It sounds like the bov return might be facing the wrong way causing air to flow back up towards the afm. The bov return needs to face the turbo compressor wheel.

[R33ram]

im using a greddy copy face foward plenum and bov is the vulture motorsport ones and from the throttle body side its plum back all the to the turbo intake which is a 3inch metal pipe intake to turbo...

it is very far to the turbo the bov.....

[R33ram]

the bov is facing towards the front of car for adjusting....

[scotty nm35]

Can you get a picture of the intake and how the bov line joins into it?

[R33ram]

[R33ram]

Just tested it again with no gear changes just flat out full throttle right through the rev range and perfect and then tryed it 1st through to 3rd and just cut out throught the gear changes like a jerk type and then bang goes again but every gear change was making a sound like back fire type like pooof and dropped revs and went again...sound was coming through the pod and it wasnt the bov sound or turbo flutter...

[scotty nm35]

Well the blue bov return hose definitely isn't pointing towards the compressor, can you take it back to the fabricator and get him to face it away from the afm a little more?

[R33ram]

What if i just swapped over the black catchcan one with the blue one that be closer yea or does it need more closer?

[scotty nm35]

It needs to dump towards the turbo, neither of those pipes do. If any returned air flows back up the pipe past the afm it will cause the problem you are having.

Where are you located? Surely there is a fabricator close by that can angle the return a little? Or take it back to the shop that made it?

[R33ram]

Im located in melbourne south eastern suburbs dandenong..

Edited July 25, 2012 by R33ram

[R33ram]

do u mean like closer to the turbo as in on top of intake....i put 2 marks on the pic here...im not real good on this as i bought car with that intake.

[R33ram]

Any of the 2 marks in the pic be ok,is that what you mean like that or am i wrong....

[scotty nm35]

Here is a pic of the intake I make, the bov enters on a much tighter angle pointing towards the compressor of the turbo. Yours can work if you angle the fitting a little.

Drop in if you like and I can explain it better, I'm only in Hampton Park.

[R33ram]

sounds good mate...what address in hampton park?

cheers!