3800 IAC?

[thebullfrog]

What should the IAC read fully warmed up at idle? I'm trying to figure out why I'm so freakin lean. Today I decided to check out the IAC and its way down at 35. Shouldn't it be close to 50? How bad of a vac leak is 35? Enough to account for my LTFT to be 16.4 ?

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[Turbocharged400sbc]

an iac count of 25-75 is ok and wouldnt affect your fuel trims in the way your thinking something's off on your ve (sd) and/or maf tables

is that a steady cruise reading or just at idle (D or Park)?

you tuning or just scanning?

hell what your seeing is pretty close to what voytek's car was seeing before the tuning this weekend

 

[thebullfrog]

Just at idle, havent checked at cruise. Just scanning no tuning equipment

Im tired of having 4 degrees + on a stock pulley. So if you don't think the vac leak could be that bad, then am I back to fuel delivery? filter is new but the pump may be on ts way out.

 

[Turbocharged400sbc]

Just at idle, havent checked at cruise. Just scanning no tuning equipment

Im tired of having 4 degrees + on a stock pulley. So if you don't think the vac leak could be that bad, then am I back to fuel delivery? filter is new but the pump may be on ts way out. [/b]

manifold vacum at idle? (kpa, inHg)

 

[thebullfrog]

I dunno LOL. I'll try and check today.

 

[thebullfrog]

MAP at idle fully warmed up was reading a bit over 10. It bounced around between like 10.05 and 10.35 inHg.
IAC at steady cruise was between 85 and 100 depending on how much I wiggled my foot LOL. Seemed like about 90 when I kept it good and steady on flat road.

 

[thebullfrog]

Another question/ thought. It's hard for me to imagine but is it at all possible that the gaping hole rusted in my resonator is actually allowing enough oxygen up stream to throw off my O2 reading? I mean despite the car insisting it's lean, it does tend to backfire when I let off the gas LOL. Rich knock? I doubt it since I can't imagine that much oxygen managing to make it that far upstream, especially since the problem only seems to occur at high RPM which still makes me think fuel delivery. Geuss we'll find out for sure when the Cat-back I just ordered from WBS gets here.