Backfiring Under load

[kris_]

hey guys, i have recently purchased a R33 GTST Series 2, engine mods consist of a bov, turbo back zorst (3") and front mount also a pod filter....

anyways when i put my foot to the floor in 2nd gear the car goes but it backfires aswell....

is this normal, there is no boost controller but the guage says its boosted to 11psi..

any help would be great, thanks

[342Four]

based on other threads on this subject (u should really do a search for this stuff first cause there is usually a thread or two that is usually relevant) - it could be the BOV that is the cause - that it is not releasing enough back pressure and the wastegate cant cope with the load and it backfires

it might need adjusting

either that or the zorst is the cause of the prob - though i doubt it

ask the previous owner - or the dealer - about it (depends who u got it through of course)

and NO i am not an expert - considering that i dont drive a turbo skyline (bugger) but it is what i have deduced and what makes sense 2 me

[treo]

put a stock bov on and thats a dam good start

[MYSTR33]

search MISFIRE or ban

[race_snooze]

coils dude. Look for cracks on them. Check plug gap, 0.8mm. Clean AF meter wire but be very very carful when cleaning it, dont touch it just spray it with wd40 or contact cleaner. Next check all pipes for leaks, maybe and air leak. Thats about all I can think of.

Search for a theard called report that engine failure heaps of info

Good luck

[WetGTR]

coils dude.  Look for cracks on them.  Check plug gap, 0.8mm.  Clean AF meter wire but be very very carful when cleaning it, dont touch it just spray it with wd40 or contact cleaner.  Next check all pipes for leaks, maybe and air leak.  Thats about all I can think of.  

Search for a theard called report that engine failure heaps of info  

Good luck

I agree with race_snooze but I don't think you should clean the AF meter with WD40 as this is an oil based substance and AF meters are very sensitive to oil. Clean it using a water based substance like detergent & water mixed together then spray with just water to get rid of all detergent agents. Let dry & you should have a clean AF meter.

Also check if and plugs are fouled.

[kris_]

i found out the car has a bleed valve, is it possible that the valve just isnt holding boost properly???