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Engine bogging problem

Old Jun 21, 2005 | 08:13 AM
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Red face Engine bogging problem

hey ,,,,
when I push hard on the gas the thruck stalls then picks up....it comes real close to failing then picks back up......it also has a hard time idling when you first crank it in the morning......i just had carb rebuilt....and i just overhauled my dizzy....any suggestions?......i'm running a 351m in a 1978 ford ranger.......I would love to smooth the engine out and make it more responsive to accelleration.....any help is appreciated......thanx
 
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Old Jun 21, 2005 | 08:16 AM
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What is your timing set at after the Dizzy reinstall?
 
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Old Jun 21, 2005 | 08:27 AM
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fuel problem?

sorry i was not clear.....i did not remove the dizzy....I just replaced the pickup,cap and rotor,the truck was acting up before that in the exact same way....but it was really after my carb rebuild that it started have bad accelleration problems.....i know it could be one of many things...and I have researched the manual...I guess I looking for someone who has experienced the same problem.....a little help......
 
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Old Jun 21, 2005 | 02:38 PM
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Check with the experts down here in the carb forum.
 
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Old Jun 21, 2005 | 04:13 PM
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I would begin with checking the accelerator pump on the carb. Is it getting a good shot? - If not, it could cause the symptom you describe. With the engine off, take off your air cleaner, hold the choke butterfly open and quickly open the accelerator linkage to wide open. You should see two good streams of gas shooting down from the center front of the throttle bore as you open the throttle. If you don't, that is where to begin troubleshooting.
 
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Old Jun 22, 2005 | 11:22 AM
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Question accellerator pump looks good

i checked the accellerator pump and it checked out ok
it had two real strong squirts of fuel
any other suggestions?
could it be a vaccuum problem (vaccuum advance)
when I first start it -it will die unless i keep punching the gas and sometimes it will still die even so---once it warms up it will start up with no problems-but the accelrationthen slips on the highway---if I punch it to make a light (for example)
i stall for about a second or two then it picks up..........
 
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Old Jun 23, 2005 | 01:24 PM
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Did you replaced the power valve as well?
if so, look at the no imprint on it. it should be 6-7. if it's lower than 6, or higher than 9 than that is you're problem.
 
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Old Jun 23, 2005 | 11:17 PM
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Question power valve?

I'm sorry but I do no know what the power valve is.where is it and how do I check it?
 
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Old Jun 24, 2005 | 02:54 AM
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Power valve, if it is MC2100/2150, is located at the base of the carb, covered by a square plate, hold by for screws.

Check for vacuum leaks as well.
 
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Old Jun 25, 2005 | 05:31 PM
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checking power valve??

guess I have to remove carb to get to the valve huh?
 
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Old Jun 25, 2005 | 05:38 PM
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Yes, it is what you see under the float bowl, and is between the idle mixture screws
 
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