Question about 1981 Ford F 150

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78 f250 with 351M oem 2bbl motorcraft carb. poor acceleration on take off, it hesitates. starts and dies like its chocking itself out on startup(engine cold) when its warmed up it starts easy and idles great. poor gas milage. I installed a rebuild kit for it and cleaned it out, i saw very little improvement. set the timing to 8 degrees btdc and still not much improvement. how do i set the air/fuel mixture and is there anything else to check or adjust. also how do u know if the vac. advance is working on the distributor?

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

motor1258
  • 6674 Answers

SOURCE: 1976 Gran Torino motorcraft 2150

Are you sure your idle ports ( size of pinhole) in carb aren't plugged with something? What happens if it starts to die, and you give it a quick squirt of WD-40 , down throat of carb?

Posted on Oct 18, 2008

  • 31 Answers

SOURCE: hesitates/stalls during acceleration

i would check fuel supply, volume adn pressure, i wold also look at the MAF sensor hot wire to see if it has a little chia pet growing on it.

Posted on Dec 13, 2008

motor1258
  • 6674 Answers

SOURCE: I don't know where the air/fuel mixture screw is on my carb

There should be one screw (I'm assuming it's the Carter YF carburetor 1 barrel) that's by itself away from linkages etc, more to center at base of carb where it meets manifold, that is angled approx 45 degrees going in to base. That should be your mixture screw. What symptoms are you experiencing anyway?

Posted on Apr 04, 2009

  • 295 Answers

SOURCE: 1989 ford f150 w/ 5.0 liter..... engine light on

I would check the oil pressure of the engine. The reason is the timing chain tensioners are run with oil pressrue. I think your timing chain tensioners are leaking down when engine is getting to operating tempature . The oil is thinning down as warms up , as it should to lubercate . I would check compression and do a cylinder leak down test on all the cylinders. Then if the compression is good and the cylinder leak down is good. I would change all the timing components, ( chain, timing gears, timing chain tensioners )

Good Luck , I hope this helps.

Posted on Apr 18, 2009

  • 1341 Answers

SOURCE: cold weather won't idle, engine dies

Please check your idle controller whch is normally located near the air intake.Sometimes cleaning them and putting them back solve this problem.

Posted on Dec 08, 2009

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