R33 Gtst Boost Problem Help !

[LORDS89]

hi everyone.. sorry if theres already a convo about this did a quick search but didnt find something that matched my problem

anyways

i got an r33 pretty stock apart from front mount, 300zx air flow meter, pod filter. and exhaust..

got a bit of a problem with the boost..

when drive it with the foot the the floor at about 3000-3500 rpm the car starts popping and backfiring badly the power just drops

but if i'm in 2nd and i hold the throttle about half way so the stock boost gauge is just over the 0 mark it runs smoothly to the red line then when i shift to 3rd have to hold the boost gauge on the 0 mark for it to run smoothly and so on 4th and 5th..

is this a fuel air ratio problem or spark plugs or fuel pump problem any ideas????

thanks

[Craved]

Z32 Air flow meter wont work with a standard ECU

[LORDS89]

Z32 Air flow meter wont work with a standard ECU

im not sure what ecu it has i havent looked.. its how i got the car all i did was put the front mount on.

got the car from an auction.

ive checked the intercooler pipeing and no leaks

[Craved]

sounds like its over boosting, near 7 on the stock guage when flat stick?

[LORDS89]

sounds like its over boosting, near 7 on the stock guage when flat stick?

when i flat it out it pops like hell and the boost guage trys to go ova 7 but obviously cant cause 7 is the highest it can go... i was thinking of connecting a proper gauge so i can see how much its actualy running??

but if its running heaps of boost shouldnt the car pump an equal amount of fuel in order for the ratio to be good??

cause by not holding it flat and only letting in a bit of air and its not poping duznt that mean that the air and fuel is at the right mixture?

[Craved]

when i flat it out it pops like hell and the boost guage trys to go ova 7 but obviously cant cause 7 is the highest it can go... i was thinking of connecting a proper gauge so i can see how much its actualy running??

but if its running heaps of boost shouldnt the car pump an equal amount of fuel in order for the ratio to be good??

cause by not holding it flat and only letting in a bit of air and its not poping duznt that mean that the air and fuel is at the right mixture?

7mm/hg is 14psi

SO

airflow protection - some call it boost cut.

rather savage usually, drop the boost down to about 11psi and you should be sorted. if the pod is boxed, then check the filter is still in place.

partial throttle keeps the boost down so this R&R wont happen

[INVRTD]

chris

sounds about right to me from what i have read, yeah i never like pushing anything past the point i can moitor it, boost gauge not a bad idea either mate, if like me you dont wanna spend big $$$ autometer work -+ 1psi