MN mechanic suggestions

I'm looking for a mechanic in the Twin City area that actually knows how to diagnose drivability issues on the 3.4.

I chasing a half throttle ping and subsequent lack of power. anything over half throttle. No one locally can help except just throw parts at it.

So far I've personally replaced: plugs, wires, fuel filter, fuel pump, air filter, checked timing belt for jump or slippage (only 25k on it) new MAF & OEM throttle body, and checked for vacuum leaks.

My CEL is on with an EVAP leak code PO441. I cannot imagine that causing the ping and hesitation but who knows.. I'm hoping someone local can help diagnose what's going on. Let me know if anyone can recommend a decent shop. Thanks.

 

Was that the only code?
Check fuel pressure, key on. Then check fuel pressure at idle, and at 2500 rpm. I don't have the values, but they somewhere on line. Should have thrown another code by now.
Zim

 

I have only used these guys for regular maintenance type stuff (as I haven't had any issues with my truck), could reach out to them and see if they have experience in what you're looking for: https://www.pro-techautorepair.com/

 

Found out it was crummy gas I'd been getting at the same place near my work! Derp...

 

Maybe injector or clogged catalytic converter, not much help to you otherwise

 

Good you got it figured out

 

Always nice when you guys come back and tell everyone what the problem was, helps someone else

 

What gas station so we know not to go there

 

Fleet Farm in Cambridge Minnesota. It's right outside my work, so I always stopped there. Not sure what it is about their fuel, but my rig hated it.

 

Good to know. Glad you sorted things out.