If the check engine light has not come on, it is most likely a vaccume leak.
IT could be a faulty transmission or the belt could be grinding up against an unknown source. = )
Check the Cats have not disintegrated.
There are several things that can cause your 2004 Chevrolet Trailblazer to idle rough. The most common causes are a dirty fuel filter or a dirty air filter.
I don't know for sure, but I have the same issue (2004 Endeavor LS). I have asked a mechanic this and the only answer i got was that it could be an exhaust leak. I haven't actually got it looked at, have you found out anything new?
A dead battery would not cause an engine to seize
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
A faulty EGR (Exhaust Gas Recirculation) valve in a 2004 Hyundai Sonata can lead to several issues, including rough idling, reduced engine performance, and increased emissions. It may also cause the check engine light to illuminate and result in poor fuel economy. Additionally, failing to address a malfunctioning EGR valve can lead to potential damage to other engine components over time.
Check the EGR vavle
I just had this problem on my 2004 Colorado. The Idle Actuator control motor on the throttle body was bad. Cost $160 for the part.
The check engine light in a 2004 Toyota Tacoma can come on for many reasons. It could indicate an exhaust leak or a problem with the engine.
no cause a 1994 may have a bigger engine
The cast of In the Rough - 2004 includes: Douglas Sept as Brog Kirsten Severson as Oola