truck won't go beyond 30 mph

Asked by Feb 11, 2019 at 04:23 PM about the 1998 Chevrolet C/K 1500

Question type: Maintenance & Repair

I was driving just fine then I heard a clunk in front
of me felt like I ran something over then won't go
beyond 30 mph I didn't leave anything on the road
either

2 Answers

8,030

The basics for problems at higher rpms, check for a blockage of some kind, the first two things I think of is fuel and exhaust? Any applicable trouble codes? Do you think the tranny is ok?

63,175

Could be a clogged catalytic converter, and here's why: might be a failing fuel pump that's not creating the right pressure and causing multiple misfires. These misfires push raw gas into the exhaust and destroy the converters. as oilyspill advised, check for codes and this might give you better direction.

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