Hey everyone I'm trying to fix my 2001 ranger I have done everything except replaced fuel injectors O2 sensors and catalytic converter. I have a new fuel pump in it new maf sensor new TPS sensor. My issue I'm having is when it's cold and I let the clutch out slowly and give it half throttle its struggles badly and barely moves once it warms up it's fine but on heavy throttle it's still is hesitant can anyone help me figure out the issue it would be appreciated thanks

 

What are the actual codes?
How many miles? By hesitant is it jerking, revving up but not moving, bogging down ?

 

Welcome to the forum

Idle should be very high on cold start, does that happen?

Then idle will slowly go down as engine warms up, does that happen?

Yes, need EXACT Codes, code list here: https://www.therangerstation.com/tec...II_codes.shtml

So you can see the issue if we don't have the exact codes

 

Lean could be restricted fuel filter , fuel pump performance ,vaccum leak,O2 , faulty TPS ( I know it's new test it) timing, cam sensor.

 

Sorry for the delay. The codes are p0171 and p0174. It doesn't have high idle when cold maybe a thousand RPMs and it's jerking very slightly when accelerating. Also when it is cold right when you take off it won't accelerate it's like you're not even giving it any gas but once you get over 5 or 10 miles an hour the truck starts accelerating fine. This only happens when you first get in the vehicle and go

 

Have you thought about IAC valve?

 

What engine do you have ?
A 4 cyl. doesn't have a bank 2, so the P0174 doesn't make sense.

 

If memory serves me, they called the downstream "bank 2" on the duratech, IDK why. I always got bank 1 and 2 lean codes when my o2 unplugged itself.