Misfire/Backfire problem

[user6579]

When my boost pressure exceeds 17psi the vehicle mis-fires, (sounds like a back fire). Can someone help me solve this problem.

I own a EVo VII JDM spec, greedy boost controller spec II, intercooler, full 3 inch exhaust, stock metal BOV, performance air filter.

I just purchased a wideband sensor/data logger and i also have access to the dealers Scan tool.

Please advise what information ou would require to have this problem diagnosed?

Just a thought but, check the cam position sensor isn't damaged :???:

[petbeemer]

plugs?

I used to have this problem when i first bought the car.

Turned out to be knackered plug

[RSE MOTORSPORT]

I'd start with the plugs first too

If that doesn't sort it then time to look deeper

Hope you get it sorted babe

Originally Posted by WAGGY

I used to have this problem when i first bought the car.

Turned out to be knackered plug

So did I, it was the cps

But as is said could be a wealth of things, plugs, plug leads, coil packs, ecu

Originally Posted by whoosh

So did I, it was the cps

But as is said could be a wealth of things, plugs, plug leads, coil packs, ecu

So, he now has 2 examples that can cause the problem he's having



Hope you sort it mate

Originally Posted by WAGGY

So, he now has 2 examples that can cause the problem he's having

Good point

Good luck sorting it, process of elimination 8)