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Okay, this is a 250 straight six. Seems like mis firing issues. Have replaced plugs, wires, cap, rotor, distributor which came with new condenser and points, manually adjusted timing, carb and adjusted valves while vehicle was running. While testing spark by pulling one wire at a time, it doesn't seem to affect much on
cylinders #1,2 & 3. Also seems like not as much vacuum from intake on carb to vacuum advance as should be. A lot of vacuum on PCV valve when pulled tho. Still pops under load but stops at high RPM. Can also kinda "feather" the gas pedal and get it not to pop, but if heavy foot it... pop ...pop..
Does anyone have any helpful hints.
This is my work van, recently purchased.
Love the Van, Love to drive, until Friday, when it started losing power when put under load and lots of popping coming from carb ....
Any help would be appreciated..
Thanks..
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Last edited by chev man; 10-05-2009 at 12:52 PM.
Reason: no replys
If you were to do a thread search in the General Tech, or the Silverado section, you could prolly find the answer. I know recently someone was having this same issue on a carbed 350. I have no clue about those old engines. Sorry I can't help.
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2007 2500HD Silverado 2WD Regular Cab 6.0 6-speed auto, I HATE UNIBODY MITSUBISHI
1968 Chevy P10 Step Van...Any help? 250ci
