Loss of power after hard pull

[Ted Darby]

I have a '97 2500 with no modifications. After a long hard pull (at near full throttle), the engine loses a lot of power and runs rough. The engine recovers after about 100 miles of easy driving. Even after sitting overnight, it still requires about 100 miles to clear up.
-Has anyone ever heard of this?
-Could it be the catalytic converter clogging up?

 

[FD5]

Lose the catalytic converter, most likely the problem. Carbon will build up in the exhaust and a hard pull may break it loose partially stopping up the cat.

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1995 2500, SLT Laramie, Xcab, auto, 3. 54, stock plate forward, 239K, Amsoiled throughout, dual by-pass filter, muffler and cat fell off, if you find them, there yours!!
1989 250, Cummins, auto, stock, work truck, 190K, soon to be Amsoiled
1967 Coronet 440, Steve Thomas built 360, auto, 2. 94, factory A/C, am radio, FAST!!!and is FOR SALE $5,500
1987 Celica GT convertible, auto, 67K
1989 Holiday Rambler Aluma-lite travel trailer
Amsoil Dealer

[This message has been edited by FD5 (edited 05-03-2001). ]

 

[JohnE]

See if you can get a <em>cat fart</em> out of the exhaust.
Afte the engine is warm find a nice hill where you can &quot;stand on it&quot; If the cat is clogged you should get a nice sooty exhaust that clears. I don't have any hills but use the <em>cat fart</em> clearing method on a regular basis. Learned this trick from Chuck Arnold at The Power Shop in Enumclaw

I'm planning to spade the cat this summer, too.

Cheers;
JE