No power after 50mph

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Jason Tyrrell

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Joined
Jul 18, 2016
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Location
Highmore SD
Expy is 98 xlt 5.4 auto 4x4 with 130k Bought this 2 years ago for $200 yes $200 with blown engine very clean inside and outside
So in August I took it in to a shop we used numerous time to have a new engine installed it was kinda a side project for them well the other day they called said it was just about done but when test driving it it would not go over 50 runs great and has power just won't go over 50 they said they think cat is plugged but I think if it was the cat it would show up befor then
Any thoughts on this would help
 
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