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Hey guy's

My 33 is up the duff missing a little on idle and alot while driving on and off boost.

Quick idea of the build

Series 2 gtst

Rb25

Gtx3076

Haltech plug and play, wideband kit

740 side feed injectors

Exhaust, front mount

Everything to support 300kw

In the last few weeks its starting playing up, since chasing the miss ive done the following

Swapped cas

Swapped coolant temp sensor

Coilpacks swapped

Coil loom swapped

Injectors flowed and tested

Vacuum lines checked

02 sensor for wideband replaced

Compression test was ok

Two sets of plugged tried, gaps checked

Cleaned aac valve

The only thing that stood out, the fuel pump has a aftermarket relay that was melted but the fuse wasn't blown, the wiring is all good

Ive since replaced the relay setup, but no difference. Could my fuel pump be causing the problem?

So over it, please help!

Hey guy's,

Thanks for the responses.

Checked all cooler pipes cant find a leak, also replaced vac lines

Compression test was good. Approx 150 across all 6

I only have a short trip to work and I've noticed that once the cars warm the misfire goes away and it drives perfect again?

What controls the cold start, maybe its related

Thanks in advance

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