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Tuning on AEB TB

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 Post subject: Tuning on AEB TB
PostPosted: Wed Jun 15, 2016 10:44 pm 
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Stuck in first

Joined: Fri Aug 01, 2014 2:57 pm
Posts: 3
I've got a crazy idle issue and Im about 90% sure at this point the culprit is my AEB throttle body.

Stock compression AEB with a GT3071, stock AEB TB, 034 efi IC w/ wasted spark.
Idling anywhere between 650 and 750 rpm, with a misfire. ~14.7 AFR, 20inHG vac (obviously not consistently with the miss.) Worse when cold.

Idle gets considerably less violent if I manually rev it up to 900-1k, though it still misses. Lacks power while driving until Im getting ~60kpa manifold pressure/1300rpm.

I popped a vacuum line and my AFRs shot up to ~12.5, but the idle was smooth and consistent; no miss.

Im almost positive at this point its just my throttle body being too restrictive and choking my motor. Compression is good, timing is good, vac is good, injectors are relatively new, plugs are new.

Im almost positive I read somewhere (not in a dream) people were having issues with the AEB TB being too restrictive, but I wanted to get input before I go hunting for a bigger TB (and a new intake mani, obviously...)


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