Huge hesitation, mechanically inclined. Please help

[#1taho]

How's your air filter ? I have read only a few of the posts but I ask on the filter cause I changed my stock one for a cold air set up and no more hesitation

 

[Brian Wilson]

Air filter is new. It had a aftermarket tube when I bought it. I thinks it's called a modular intake tube. Basically a stock airbox with new filter and a straight plastic tube

 

[Brian Wilson]

I believe I will try and get into contact with justin again. I didn't want to buy the 600$ autocal but if it is better I guess it must be done. And I have already spent more than 600$ trying to fix this thing so I guess it's time

 

[MichaelSE]

Damn man, what a mystery. I'm sorry you're dealing with all this. Here's my idea, hopefully it leads somewhere. Take off the intake tube and have someone try various throttle positions (10%, half, WOT) while you watch the throttle plate. *Maybe* an internal issue with the throttle control motor is preventing it from opening to where it should for certain throttle position ranges.

I believe the ECM uses the actual pedal position to determine throttle input, so maybe that's why it looked fine on the computer.

Edit: I see that you replaced the TPS already so you may have already checked this. If so feel free to ignore my post!

 

[Brian Wilson]

No sir. Any help is appreciated. One guy told me my carb float might be stuck so..... no advice is bad advice. I have tried that but, since the position of the throttle plate is not exactly linear with flowthru, it's really hard to say if that it's the issue. I guess my next step is to swap the throttle body itself with my brothers denali while I wait for justin to get back with me.

 

[Brian Wilson]

And smoke the intake as soon as I find someone local with the right equipment to do it

 

[MichaelSE]

No sir. Any help is appreciated. One guy told me my carb float might be stuck so..... no advice is bad advice. I have tried that but, since the position of the throttle plate is not exactly linear with flowthru, it's really hard to say if that it's the issue. I guess my next step is to swap the throttle body itself with my brothers denali while I wait for justin to get back with me.

Definitely worth a try. Have you cleaned your PCV channel hoses? I sprayed carb cleaner through mine a few weeks ago and the amount of crap that came out of them was crazy.

 

[Brian Wilson]

I have not tried that. But I probably should. Although I need to do it, I doubt a slight excess in crank case pressure would do cause what I'm experiencing right now. But I will do do asap since I'm waiting to install a catch can I bought a few weeks ago. It would be a good time to do both!

 

[#1taho]

No sir. Any help is appreciated. One guy told me my carb float might be stuck so..... no advice is bad advice. I have tried that but, since the position of the throttle plate is not exactly linear with flowthru, it's really hard to say if that it's the issue. I guess my next step is to swap the throttle body itself with my brothers denali while I wait for justin to get back with me.

Carb float ?! That's worse than the advice I gave you. Mine was a stab in the dark cause you seem to have coverd everything. Don't rule out a faulty new part tho. Had a few of them in the past

 

[ISU-152]

Egr?