Hello from Queensland

ALL NEW PEOPLE
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Hey guys only new to this forum looking for some potential advice regarding my l200 project. Only new to Diahatsu’s and purchased my Mira a couple months back. After getting a bit busy with life and uni I kind of put the poor nugget on the back burner for a while and am trying to pick her up again.

It has had the Franken motor 850cc block with 660cc efi head swap already done to it. I have a bit of a problem on my hands at the moment. (Very sorry if this is a stupid question it is true that I am not the smartest at times). Hopefully someone with a bit more experience might be able to help me out.

At the moment she runs pretty rough. When I unplug the MAP sensor vacuum hose in runs smooth, just rather rich. However, with the MAP sensor all plumbed up it chokes and stalls out. When I give it some gas, it bogs down and backfires as well. Is this a result of a faulty MAP sensor?

I have asked some other Facebook groups and they are suggesting an adjustable fuel pressure regulator. Should I be chasing one of these? Just a bit unsure as I am new to Daihatsu’s and older cars like my Mira, thanks guys for the help. Any recommendations would be greatly appreciated. Also apologies if this in the wrong chat.
Cheers

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Hey mate welcome and thankyou for making the intro post.
I won’t advise you on your situation as I already have on facebook. (it was me) I would advise to have a read through a few build threads, I have one about my old move that had the franken engine in it also, So you will be able to see what I did.

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Welcome. Wish I could help you :frowning:

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Welcome!

Do L200s have obd at all? If they do then get a code reader on if possible.

Alternatively, buy a MAF (or borrow a known-good one) and see if it helps the running issue. AliExpress would be a cheap way to do this if you can’t borrow one from someone local.

Have you checked for vacuum leaks anywhere else? Specifically after the MAF sensor.

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they are not obd and use a map not a maf

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