86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Rough idle after motor swap!

Old 08-06-2015, 10:43 AM
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Question Rough idle after motor swap!

Hi guys,

Need a hand with the newest problem on my motor swap. Just swapped my blown 3vze (standard) with a fresher 3vze (automatic). I switched the harnesses when I put the fresher one in. The newer one ran fine before the swap.

Upon swapping them, the truck will start fine and run great until it warms up. Once warm, it will suddenly start having a rough idle and be around 600-700rpms!

I'm open for some solutions so send them my way!
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Old 05-09-2019, 08:44 AM
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I know this is an old thread but did you ever solve this issue? My 22re truck is having the same idling issue.
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