Boost Issues

[perzn_34]

Hey guys I've got a r34 gtt with a built r33 motor in it.

The main mods are:

Forged bottom end

HKS step 1 cams

Trust td06SH 25g kit

Haltech plat. pro

Greddy stle manifold

555cc denso injectors

aeromotive 340 fuel pump

splitfire coilpacks

apexi avcr ebc

320rwkw at 20psi on bp98

The motor ran perfect while it was in my r33, after i put it in my 34 and got it retuned, its been fine. Boosted as per normal etc, but every now and then it would turn off under full boost but very rarely.

Now after 2-3 months i have two main issues and one minor:

1. It doesn't hit full boost, bounces only between 0.9 to 1.1 bar

2. The turning off problem has gotten worse, today it would just turn off EVERY time i try to hit boost around 0.7bar

3. Minor issue: the idle sometimes drops to somewhere around 500rpm so i have to hold the gas pedal to bring it to around 1000rpm, but thats not all the time

Does any one have any idea where the problem could be?

[GTSBoy]

Find mechanic with dyno. Run car on dyno. Troubleshoot while it does it..

[perzn_34]

Find mechanic with dyno. Run car on dyno. Troubleshoot while it does it..

mainly wanted to fix it myself

[iruvyouskyrine]

What ecu? Log data if ecu is capable am analyse it.

[Scott Black]

Says haltec platinum pro in his post, you need to see what the ecu is doing maybee it's cutting on purpose, maybee you have a dead sensor, maybe something else is failing.

[perzn_34]

how can i log the data ? I've got the haltech program on my laptop but haven't used it much

[iruvyouskyrine]

Says haltec platinum pro in his post, you need to see what the ecu is doing maybee it's cutting on purpose, maybee you have a dead sensor, maybe something else is failing.

Missed that whoops.

Ring haltech tech support or try and find a manual for your ecu. It will mention it somwhere.