I need some help!!!!

[tommyb6273]

I have a 1997 1500 4x4 5.9 190,000 miles

im having a couple problems, sometimes when sitting at a traffic light it will start idling rough like its gonna stall. i have to tap the gas to keep it running then it will idle fine, also if im getting on the gas to pass a car sometimes it feels like im holding the brakes for a couple seconds then letting go and the truck takes off.

Ive changed the tps, iac, map, fuel injectors, fuel pump, spark plugs, the cap rotor and wires are 3 months old, i checked them and they still look good. i had the trans rebuilt, did the plenum upgrade. i checked for vacum leaks and didnt find any.
Im not sure where to look next, am i over looking a sensor? could it be the computer going bad? I do have a 02 code because theres no cat but ive had that for the last year and these problems started in the last month. there is no other codes.

Any ideas?

Thanks

 

[talon6]

throttle body dirty?

 

[Okiespaniel]

PCV valve or clogged breather hose?

 

[tommyb6273]

TB was cleaned 2 months ago, pcv is new. i took back the tps and iac and installed different ones today and still have the same problem.

 

[talon6]

maybe tb gasket.

 

[Bigtman07]

Mine used to do something similar to that. It still does from time to time. But I did a compression check and found that one cylinder was extra high. I ran some seafoam through it and it stopped acting up. Just a thought to try.

 

[jbmobbs]

sea foam it.......and check ur plenum?????maybe???

 

[dogcar3]

sea foam it.......

This. Or try running some high octane gas or an octane booster and see if it helps, might have just got a bad tank.

 

[WhiteExpress]

Seafoam works great. Could also be a broken cat. get under it and strike it with the palm of your hand (once cold, obviously) and see if it's rattling around in there.