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Yesterday, 08:26 PM
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#1 |
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Registered User
Join Date: Jun 2017
Location: Mentor, OH
Posts: 136
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Rough idle and takeoff 250 inline
Good evening....
My '68 GMC has an inline 250. It's been running beautifully all summer, including this past Saturday when I took it on a 400 mile, all highway trip to a show. Yesterday I went to go for a ride and now it's idling rough and is rough on takeoff with an occasional backfire. Once up to speed it still runs fine. I changed the points tonight since they looked pretty bad (after only a year) and it didn't help. Tomorrow I'm changing the plugs. What else could it possibly be? Last year I changed everything... Plugs, wires, cap, rotor, points, condenser, coil, carb rebuilt, timed, etc... Thanks! Last edited by 68gmcdude; Yesterday at 09:53 PM. |
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Today, 07:20 AM
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#2 |
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State of Confusion!
  
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,947
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Re: Rough idle and takeoff 250 inline
Check/CHange/claen your fuel filter. You may mav gotten a piece of crude in it that's partially clogging things.
__________________
Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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Today, 07:59 AM
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#3 | |
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Registered User
Join Date: Jun 2017
Location: Mentor, OH
Posts: 136
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Re: Rough idle and takeoff 250 inline
Quote:
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Today, 09:58 AM
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#4 |
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Registered User
Join Date: Dec 2023
Location: Rural California
Posts: 24
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Re: Rough idle and takeoff 250 inline
Check for a vacuum leak then check the timing.
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Today, 10:58 AM
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#5 | |
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Registered User
Join Date: Jun 2017
Location: Mentor, OH
Posts: 136
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Re: Rough idle and takeoff 250 inline
Quote:
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