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Should take 10 mins to hook a computer up and read the current dtc that is giving u a engine light, I'm sure you could do some ot at work to give you some cash for labour. U are wasting you time when the current code could help you out

Highly recommend cleaning the maf, air filter and changing the fuel filter.

Have you given us a list of modifications yet?

I am guessing you have an aftermarket ecu if you are using a Z32 afm?!?!

There is a DIY tutorial for fixing afm's which requires a soldering iron, a stanley knife and a small amount of common sense.

Correct me if i'm wrong but i'm going to make a few assumptions.

If your car is backfiring, and your running an aftermarket ECU - the logical thing in my opinion is you need to have it tuned instead of running whatever base map you have on it.

Car backfiring as a result of fuel overrun governed by an aftermarket ECU - sticking a z32 on it won't help unless your going to have it tuned.

At a stretch, if you haven't yet tuned it, you could try resetting the PFC via the commander to factory setting?

Edited by tranman

pull your plugs out a check if there fouled, and inspect your coil packs for cracks, coil pack are extremely common to be faulty. if you have shit spark it will over fuel and backfire. but if you think its the maf you should check TPS & CPS as well

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