Why is my 1989 Buick Regal keep dropping in.

Tiny
SUGAR1059
  • 1989 BUICK REGAL

Why is my 1989 Buick Regal keep dropping in speed when I drive it, I have changed the fuel pump and filter a couple months ago and it ran fine, now a couple months later its missing real bad, so I changed plugs and plug wires and air filter and put fuel injector in it and now when I drive it, it hits a certain speed and stays there or it drops down, it also goes really slow up hills. Please let me know what anyone thinks might be wrong with it. Thank you

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Wednesday, November 7th, 2012 AT 4:26 AM

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Tiny
ASEMASTER6371
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  • 25,554 POSTS

Check the back pressure on the cat converter. It may be clogged

Roy

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Wednesday, November 7th, 2012 AT 4:27 AM

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