360 engine trouble

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Jul 29, 2005 | 04:12 PM

custom69

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Joined: Dec 2004

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From: loveland colorado

360 engine trouble

hi, I just came across a problem with the 360 engine in my truck. I just put a new 2 barrel carburator on pickup, and just got done with the long bed to short bed conversion when i drove down the street and almost cried. OK, When I start out of course i start in 2nd gear and i try to hit 3,000 rpm's before shifting at about 2000 rpms, my truck starts sputtering and running like crap, and you can feel it stop accelerating then if you push the pedal down all the way it will start accelerating again. This happens in every gear at 2000 rpms. when the truck is stopped and not in gear it will rev up fine. could this be ignition problems or carburator problems maybe the accelerator pump. i'd apperciate some advice
thanks,
cole

Aug 1, 2005 | 08:49 AM

Freightrain

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Joined: Jan 2003

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From: Ohio

Hmmmmmm.........

Sounds like it's running out of fuel, but it should not be because of accel. pump. That does not last but a second when you initially hit the throttle. How is the timing?? Vacuum advance hooked up correctly. When you get to 2000 rpm it may be pulling high vacuum(as you are not a WOT and basically at partial throttle), retarding timing, then when you get to WOT you drop manifold vacuum letting it return to just mech. advance. Revin' it with no load will not create the same response from vacuum advance.

Try this: disconnect vacuum advance(plug line so no leaks! ), then drive it. See if it improves any.

Aug 4, 2005 | 08:45 PM

76f150_4x4_360fe

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And just so you know, RPM stands for Rotations Per Minute, its not RPMS

Aug 9, 2005 | 09:16 AM

1975Ford

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have you given the 360 engine a tune up. spark plugs, spark plug wires, cap & rotor, gas filter, air filter, pvc valve.

Also check your vacuum lines for cracks or for a vacuum leak.

Did you adjust the fuel adjustment screws on the carburator after you installed the carburator, the two adjustment screws are located in the front of the carburater, with engine off and air cleaner removed turn the the two screws clockwise till they bottom out don't over tighten them (important is to make sure there are no engine vacuum leaks), then turn screws counter clockwise about 2 complete turns. Start engine, be careful with engine cooling fan and fan belts, turn each adjustment screw by 1/4 turn counter clockwise till engine idle smooths out, might need to turn the screws in to achieve a smooth idle. If you lose the number of turns on screws start over again from 2 turns out.

Aug 9, 2005 | 12:08 PM

Bear 45/70

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Joined: Mar 2004

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From: Union, Washington

Quote:

Originally Posted by 76f150_4x4_360fe

And just so you know, RPM stands for Rotations Per Minute, its not RPMS

Maybe "Revolutions Per Minute". And actually you are allowed to plural it as in RPMs or RPM's. English is a wierd language.

Aug 9, 2005 | 04:49 PM

plowpusher

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Joined: Sep 2003

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From: lino lakes, mn

deffinetly carb trouble look inside the carb is gas spilling over at idle? what color is the exhaust? if its black your to rich floats to high, needle stuck, choke closing because of a broken or misaligned thermo spring or dead pulloff

Aug 17, 2005 | 02:44 PM

ramtoo

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Joined: May 2005

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From: Arlington Texas

Mine did this had to big of a power valve but this was a holley 2 bbl. This happen right after I rebuilt the holley pulled it out and put in the old one and it cleared up.