running like crap - Pirate4x4.Com : 4x4 and Off-Road Forum

Rock-Wear · 11-04-2003, 07:49 AM

I recently bought a 1970 f250 w/ a 302. It ran great when I first bought it 3 weeks ago, but now it runs like crap. At full throtle it runs fine but when I lightly depress the pedal the truck lurches and sometimes backfires and shoots flames out the tailpipe. I can almost hear it just spitting fuel instead of a constant spray. Is it time for a new carb, or a simple fix?

ImNotRight · 11-04-2003, 09:40 AM

Probably be best to start with the basics first. Vacuum lines, state-of-tune (plugs, wires, cap, points if it has them) if it has an EGR valve.. You know, start with the easiest and cheapest first.

Dave C · 11-04-2003, 05:19 PM

what kind of a carb does it have? If it's the two barrel that thing is ridiculously easy to rebuild. I think the kit is about 10 bucks or so

Rock-Wear · 11-04-2003, 06:17 PM

well... we just rebuilt the carb and timed it. still runs the same

checked vacuum lines, pcv valve. it has new cap, rotor, points, plugs and wires

Dave C · 11-04-2003, 06:30 PM

electronic ignition or points? points may be worn or gapped incorrectly

bobbywalter · 11-04-2003, 07:29 PM

sounds like the motronic blues....

damn thing must have points. swap up or get used to tune ups.

11-04-2003, 07:49 AM	#1 (permalink)
Rock-Wear Registered User Join Date: Nov 2002 Member # 15186 Location: Where I lay my head is home Posts: 2,236	running like crap I recently bought a 1970 f250 w/ a 302. It ran great when I first bought it 3 weeks ago, but now it runs like crap. At full throtle it runs fine but when I lightly depress the pedal the truck lurches and sometimes backfires and shoots flames out the tailpipe. I can almost hear it just spitting fuel instead of a constant spray. Is it time for a new carb, or a simple fix?

11-04-2003, 09:40 AM	#2 (permalink)
ImNotRight Registered User Join Date: May 2003 Member # 19666 Location: Napa, CA transplant. Posts: 1,207	Probably be best to start with the basics first. Vacuum lines, state-of-tune (plugs, wires, cap, points if it has them) if it has an EGR valve.. You know, start with the easiest and cheapest first. __________________ QUOTE=TheHawes;15027873 If it wasn't for pussy, I'd hunt them fucking things.

11-04-2003, 05:19 PM	#3 (permalink)
Dave C Registered User Join Date: Jul 2003 Member # 21297 Location: idaho Posts: 451	what kind of a carb does it have? If it's the two barrel that thing is ridiculously easy to rebuild. I think the kit is about 10 bucks or so __________________ 1978 Bronco buggy. Propane powered 351m, c-6, 4.56 gears.

11-04-2003, 06:30 PM	#5 (permalink)
Dave C Registered User Join Date: Jul 2003 Member # 21297 Location: idaho Posts: 451	electronic ignition or points? points may be worn or gapped incorrectly __________________ 1978 Bronco buggy. Propane powered 351m, c-6, 4.56 gears.

11-04-2003, 07:29 PM	#6 (permalink)
bobbywalter winch operator Join Date: Dec 2002 Member # 15473 Location: prudenville mi Posts: 702	sounds like the motronic blues.... damn thing must have points. swap up or get used to tune ups. __________________ if only 88 ranger ext cab pos hackjob powered by a 6.5 diesel clattering against a 4l80 thats punishing a f208 that is turning ford 60's rolling on 33-44 in tires depending on the mission at hand how ya like me now??

11-04-2003, 06:17 PM	#4 (permalink)
Rock-Wear Registered User Join Date: Nov 2002 Member # 15186 Location: Where I lay my head is home Posts: 2,236	well... we just rebuilt the carb and timed it. still runs the same checked vacuum lines, pcv valve. it has new cap, rotor, points, plugs and wires

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