300 starts to loss power
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Tuned
Joined: Jul 2004
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From: Jersey Shore
300 starts to loss power
I have an 82' bronco w/a 300 4.9l in 1st gear it pulls great, but if i dare shift gears before i hit 3000rpm's the bronco starts to shack and it takes a long timw to start pulling again. This is the same in every other gear(4spd) after that. What can I do? Does the carb need adjusting? Im putting a new rear in. what gears should i through in there? 
Posting Guru
Joined: Apr 2003
Posts: 1,153
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From: Venezuela
1° Shaking engine? have a general tune up if it doesn't fix it then take compression readings, maybe there is a problem inside engine
2° You should check your door looking for a decal with Rear axel model info, but based in your configuration it should be at least 13X42 or 3.23
2° You should check your door looking for a decal with Rear axel model info, but based in your configuration it should be at least 13X42 or 3.23
Thread Starter
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Tuned
Joined: Jul 2004
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From: Jersey Shore
Both of what you are saying sounds like a great place to starts, except the engine only has about 1000 miles on it. I just finsished up a rebuild on it. thats where im getting stuck at??
Senior User
Joined: Jun 2004
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I'd recheck the cam timing. Also check the distributor placement. If the cam is out the compression check would pick that up. On sixes the carbs loosen from the intake occasionally but if you just overhauled it should still be tight. Good luck!!!
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Joined: Aug 2003
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From: Westmont N.J.
questions
When the engine was rebuilt\replaced was the fuel filter new?
How about the fuel pump, is it new\rebuilt or just swapped over from the old engine?
How about he carb, new also? even if the Carb was replaced it could still have a low float level causing a fuel starvation upon acceleration.
Were any of the fuel lines kinked, smashed, flatened, ,twisted or damaged when the engine was replaced?
How about the fuel pump, is it new\rebuilt or just swapped over from the old engine?
How about he carb, new also? even if the Carb was replaced it could still have a low float level causing a fuel starvation upon acceleration.
Were any of the fuel lines kinked, smashed, flatened, ,twisted or damaged when the engine was replaced?
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Tuned
Joined: Jul 2004
Posts: 321
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From: Jersey Shore
Everythign was replaced brand new except the carb, which i did a light overhaul on it. Im think that it might not be gettingh enough fuel...? Also if I put the 4barl on there, how wouold tha effect my fuel econ.? 
