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Q: if i do nothing will it get worse on 2001 Chevrolet Express 1500

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
engine runs rough..could it be fuel pressure regulator? light does come on. what other reasons for engine running rough? had tune up and fuel additive.
(2) Answers
There are many different things could cause that.
You really need to get it diagnosed by a shop to see what causing the problems. They should be able to pull out diagnostic trouble codes from the affected modules and be able to estimate the parts and repair cost for you.

Zee
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