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Old 03-12-2013, 04:40 PM
j cAT j cAT is offline
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Re: engine jumps at 1500rpm

Quote:
Originally Posted by silverado122775 View Post
Hello Folks!

Have a questions for your mechanics out there.

2000 Silverado Z71 5.3L. 242K on truck ( not on engine )

I replaced the Fuel filter, changed the oil (synblend) and cleaned the air filter (k&N). Everything was working fine yesterday until I get gas today. Now between 40-45mph or roughly 1000-1500RPM the trucks seems to jump continuously. now if I drop down a gear it is fine. if I floor it, it is fine. idle is fine. now if it is going down hill, I do not feel it. but if I am at a level grade or climbing and am trying to keep it between 40-45mph, it feels like its choking. the RPM jumps up then drops back down. it is a slight continuous jump, but noticeable.

The fuel filter I put it is a A/C delco. Trans was serviced about 10-15k miles ago.

any thoughts?

Thanks
sounds like you put water instead of gas in it. put 2 bottles of dry gas see whats up. if it works go to that gas station and have then give you cash for the cost of the fix.
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