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Hey guys, I recently replaced my rb20det turbo with a rb25 turbo and dump.

Now that it's all back together it will idle fine from start up untill I drive it down the street and stop. Then it will idle at 800rpm like usual but then drop to about 100rpm and then back up and down.. It some times even stalls.

I need ideas on what it could be! I've tripple checked every thing to see if every thing is back on, no air leaks.

I'd love to get some feed back because I can't get my head around it now!

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https://www.sau.com.au/forums/topic/442829-horrible-idle/
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Its just weird though that it was perfectly fine before i took the turbo off to put a 25 turbo on. Now it doesnt like it. At first I just thought that maybe the computer had to relearn itself.

I live on the north side and last week I had Tafe at Archerfield. In the morning I drove to archy and it didnt Idle Funny at all. On the way home it was a diffrent story! It stalled 5 times and idled really badly. Then last night I went up Mt mee and every time i would stop it was idle shit house.

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https://www.sau.com.au/forums/topic/442829-horrible-idle/#findComment-7279059
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