Boost Problems Help :(

[skyhigh33t]

Hey i need help

i bought a electronic boost controller from HDI unfortunately the boost solenoid they sent was faulty

on the lowest boost setting it was hitting the boost cut and back firing like crazy .

i thought i had installed it incorrectly but after talking to the HDI tech support they confirmed i had

installed it correctly and it was in fact faulty a faulty solenoid.

now my problem is my car isnt boosting right

i took the electronic boost controller off and installed a mechanical turbo-tech one

I tried running 7psi and its all good for a few thousand revs then things turn to poo when revs and boost increases sounds

like its back firing/boost cutting and going all crazy

anyone had any problems like this and what could have gone wrong ?

as long as i dont rev the car over 3000-3500 rpm its ok but after that it horid

Note i have disconnected the stock boost solenoid

PLEASE ANY INFO WOULD BE APPRECIATED

almost forgot the car is a r33 series 1

thanks

Edited January 28, 2011 by skyhigh33t

[MrStabby]

This would be better in Forced Induction Performance.

Is this correct?

- it was running fine with factory boost control at about 7psi

- you made some electronic boost controller changes and it ran like shit

- you tried a manual boost controller on 7psi and it still runs like shit (but the boost builds fine to 7psi and holds there)

What do the plugs look like? (fouled?)

Are you running standard ECU and turbo?

Double check for leaks in your piping.

[boostn0199]

Your talking about missfiring its your coil packs, what happened if probably is you installed the boost controller and it was faulty and it boosted to high so it fried you stock coil packs same thing happened to me.

[MrStabby]

Your talking about missfiring its your coil packs, what happened if probably is you installed the boost controller and it was faulty and it boosted to high so it fried you stock coil packs same thing happened to me.

There's no way a boost controller can fry coilpacks - you have misunderstood what has happened to your car.

[boostn0199]

There's no way a boost controller can fry coilpacks - you have misunderstood what has happened to your car.

When the coilpacks are 14years old and you run higher than standard boost 16-18psi like I did it is enough to fry them, If they arent old that is a different story.

[MrStabby]

When the coilpacks are 14years old and you run higher than standard boost 16-18psi like I did it is enough to fry them, If they arent old that is a different story.

I wouldn't call that fried since there's no change in the coilpack caused by the change in boost. They are stuffed though. The typical failure mode is that the insulation has broken down so that high tension side of the coil finds an easier path to earth than across the plug gap. This is often to straight to the circular part of head that the coilpack sits in (check for arcing marks). The increase in boost causes the electrical resistance across the plug gap to increase as the resistance of air increases with pressure. So, if you put the boost back down then you'll probably get normal running back. Other choices are to add insulation to the coilpack (check the DIY section for a howto) or reduce the plug gap or a combination of both. Or just buy new coilpacks, and only reduce the plug gap if you still get missfire.

[boostn0199]

I wouldn't call that fried since there's no change in the coilpack caused by the change in boost. They are stuffed though. The typical failure mode is that the insulation has broken down so that high tension side of the coil finds an easier path to earth than across the plug gap. This is often to straight to the circular part of head that the coilpack sits in (check for arcing marks). The increase in boost causes the electrical resistance across the plug gap to increase as the resistance of air increases with pressure. So, if you put the boost back down then you'll probably get normal running back. Other choices are to add insulation to the coilpack (check the DIY section for a howto) or reduce the plug gap or a combination of both. Or just buy new coilpacks, and only reduce the plug gap if you still get missfire.

Yeah I know this, but what Im saying is when there old and starting to give out and you boost it up you have problems, ofcourse if you put the boost down or lower the spark gap or drive in hotter weather it will improve but I guess I should of phrased it better when I said fried them as I meant the extra boost wont work with them since there worn.