engine hesitation problem

[dheavychevy38]

Ok I have 89 k5 with a 350 all stock and auto.
My problem is once the truck is warmed up the engine hesitation when floor, but when giving it some gas its fine. When the truck sat all night no problem just when it gets to good temp. This all started after my truck some what ran out of gas due to the gauge went on me.No Check Engine Code. Tonight or tomorrow will check my fuel pressure.
*things I have check*
Egr, TPS, IAC, Timing base 0

Things I replace.
Fuel filter, cap and rotor.

I have check my ECM with winaldl. a couple flags
DRP Occured blinks ,BLM enable on, closed loop on, rich flag blinks, idle cool air on.

Any ideas what could be happen and thanks for reading.

 

[dyeager535]

Doesn't *sound* like a fuel delivery issue, since the problem is non-existent when the engine is cold.

Any codes?

 

[dheavychevy38]

no codes i am getting with the winaldl program or when i did the jump and key on nothing coming up but 12.

 

[dyeager535]

How does your engine temp look in winALDL?

 

[dheavychevy38]

Engine temp 194 F then the stat open now 180 F now a code is showing up 42 EST. but just cleared the emc code and its gone. thinking it came up cause i check my baseline timing.

 

[dyeager535]

I believe that is the code that can be caused when you disconnect the bypass wire for timing, like you mentioned.

 

[dheavychevy38]

Ok I have check Map, O2, EGR, IAC, TPS, Knock,BTS timing,Vacum lines. Put new plugs, wires cap and rotor,PVC, and fuel filter. I am at lost. no CEL, No error codes winaldl. Any ideas thanks

 

[dyeager535]

What is your timing set to?

If you've got winALDL, do you see any knock/timing retard when you floor it?

 

[dheavychevy38]

my base timing is 0. When i gun it get 12 at 1000rpm 16 at 3600rpm. well that is the most i get. sometimes it doesn't show any knock. and it retards when i floor. the timing goes to the same place with or with out a knock.