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Hey guys,

I have a bmw e30 coupe, with a rb25 and 5 speed setup out of a r33. It has (from what ive been told by prev owner) gt30/76, upgraded injectors, fuel pump, 3 inch tbe, haltech platinum pro plug in. Was meant to be making 270rwkw, but that was on a dyno dynamics dyno, i did a run on a mainline dyno and made 240rwkw with very safe afrs, and a touch of wheelspin. (18psi)

I am having a huge misfire at about 3000rpm under load, if i baby the throttle on it doesnt misfire at all, i had heard the coilpacks are known for issues. So i have swapped in some yellowjacket coilpacks but with no difference.

I have fixed a few issues, the install was a bit shoddy. not impressed with the work done to be honest.

I dont know where it was tuned, i have the haltech ecu manager but honestly dont have much of an idea as to what i am doing lol.

it also doesnt run a afm or oxygen sensor but it was very safe on the dyno run so im not overly stressed about the tune.

Where would you recommend a retune in adelaide?

Any ideas on the misfire guys?

Cheers for any input!

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so does it have a map and air temp sensor?

miss fire will generally be more erratic and not at a specific rpm.

When you say huge miss fire does it feel like it cuts out? misfires are generally less aggressive as it sounds with you

what psi is it at 3000rpm?

what turbine housing size? waste gate? boost control?

vct working?

has is always been like this since ownership or just recently?

need more info bout your car my friend

Edited by Candyman69

Doesn't run a maf sensor, doesn't run an oxygen sensor, it hasn't always been there, it's what I would call a misfire, fullpower, to nothing then full power, might do it twice and then its all good all the way to 7300,

It does seem to be getting worse, I will try plugs and see what happens.

Turbo I was told is a gt30/76, other than that I don't know. How can I check vct? It is all good if I ease into it.

I'll go for a squirt and have a go at data logging it later today so I know exactly what psi it's at

Haha yeah it 'looks' like there is a bit of room but I've run out of space in the tunnel so would be a massive job to move it back to get the cooler hidden

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