Boost Problem

[tshaw44]

hey everyone my r33 skyline when i hit boost its not pulling as hard and then when it gets to about 4-5rpm it kicks in proply and no my clutch isnt slipping i just put in a heavy duty couple weeks ago and got the mechanic to look at it to make sure its not slipping or anything any idea's of what it could be?

btw i need to replace my afm cause it keeps cutting out once in a while would that have anything to do with the boost problem?

thanks

tristan

[NISSAN GTR]

hey everyone my r33 skyline when i hit boost its not pulling as hard and then when it gets to about 4-5rpm it kicks in proply and no my clutch isnt slipping i just put in a heavy duty couple weeks ago and got the mechanic to look at it to make sure its not slipping or anything any idea's of what it could be?

btw i need to replace my afm cause it keeps cutting out once in a while would that have anything to do with the boost problem?

thanks

tristan

Is the car running rich and blowing black smoke out when changing gears, mine was lagging heaps at 4000rpm , i had the same problem with mine , it was the AFM and stock catalytic converter which i changed over ! no probs now good luck

[Benzino33]

Stock skylines have 2 stages of boost. 3-4 psi before 4000rpm and 7-8psi above 4000rpm to redline. so if ur car is stock then it sounds normal to me. what mods do you have?

[R31Nismoid]

Factory ECU?

Increased the factory boost?

[Benzino33]

when i hit boost its not pulling as hard

pulling as hard as what? was it more responsive before or do u just expect it to pull more in the lower rev range?

[Lukas 33]

What boost you running? Is it just the stock boost? Do you have a standard computer and afm? You should really replace that afm if its not going to well. Its not misfiring as you pull at that rpm is it?

[tshaw44]

the car is stock and is on stock boost only has 3inch cat back it use to pull harder but after i got my clutch done and done the first 1000kms on it i started giving it to it i relised it wasnt going the same as it use to