Towed for the first time,have problem! ! ! HELP

[dartgt]

well yesterday i towed for the first time with my 97 350 dually psd automatic. mind you it is all stock, and i was towing about 11k. It towed great all until i was about to merge onto the highway, and it has done this twice before on open roads. It seems like in third gear as i am under full load trying to merge, at about 2800 rpms or so the truck must like defuel or something, it slowly misses.. almost like a limiter or something..

any ideas on what it might be?

if i let off and it shifts, it is fine but it is almost like it struggles to get to like 75mph..

any info would be great..

is the wastegeate spring weak?

[dartgt]

anyone here?

[Banshee34]

You aren't in OD right?

[rednekexprez]

[dartgt]

no sir why?

[Banshee34]

Well by no means am I tech, (had to premise with that), but I had a truck that did that and it was my TC. Hoping in your case it's something else!

[screech]

Ck for codes. Poss. restricted filters(air&fuel). Poss. weak hpop. Or poss. trans converter problem.

[dartgt]

ok will check the codes and filters first, but how would you check the hpop?

[dartgt]

also under acceleration it sounds like i have an exhaust leak,

[dartgt]

it like puffs air pfft pfft pfft pfft