Throttle body issue

2444 Views 2 Replies 2 Participants Last post by Novtec1, Apr 4, 2005

Novtec1

Discussion Starter · Apr 3, 2005

well yesterday went down to dallas to let mark for turbotrix tune my car... for some odd reason on my 2 1/2 hr trip down the car made 20.5 lbs of boost, get it on the dyno... most i can get out was 17.. so we do a pressure test and hear air hissing out the throttle body. mark says its a common proble on 1G DSM's but never seen it on a EVO before. anyone ever see/heard of this problem before?

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turbolarry

· #2 · Apr 3, 2005

Yea, appearently it's an o-ring... if it's the same problem. 1g's fix it by rebuilding the throttle body like this;
http://www.plymouthlaser.com/tbor.htm
but it's for a 1g. Hope it helps.
Maybe these will work, call'em and see;
http://www.machv.com/throtbodseal.html

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Novtec1

Discussion Starter · #3 · Apr 4, 2005

found the leak.. it looks like the throttle body gasket is leaking from the top... hopefully this is the problem.. if not then im gonna go and replae the o-ring. im taking it to my dealer today and see what they say.. they're pretty kool so i'll keep you guys informed.

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