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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Loud Engine Nocking

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Old Aug 28, 2001 | 08:07 PM
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Loud Engine Nocking

i've had some posts about my previous engine problems. well i finally got the timing right and the engine fired right up. now i've had carb problems and probably need a new one but i was just wondering about something. i put in a new distributer and have problems starting it up with a backfire out the exhaust pipe and a few other odd noises in the engine. now when i start it up there is a loud nocking noise. it sounds like it is more on top of the engine but i can also hear it while under the truck. the timing isn't exact but is in the ballpark where it should be fine to run. my question is is this something i should be worried about or will a fine tuning of the timing and carb cure this? when idling it stumbles quite a bit and when i rev it it doesn't have much response. then after about 5 minutes it slowly lost power and shut off. i'm taking it to a mechanic soon but just wanted some of your input. thanks
 
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Old Aug 28, 2001 | 08:09 PM
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Loud Engine Nocking

by the way it's an 80 f-150 4x4 with 400 cui engine
new timing chain, plugs, distributer, and water pump

 
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Old Aug 28, 2001 | 09:34 PM
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Loud Engine Nocking

does it sound like a rod let loose or what, i worry about any "loud knocking" this usually helps me get motivated looking for a new motor, sorry to be the bearer of bad news hopefully its nothing major cheif
 
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Old Aug 29, 2001 | 12:12 PM
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Loud Engine Nocking

I have a 400 in my 80 F350. When you replaced the timing chain, had it broken while driving? When mine broke, it bent a couple of the pushrods and caused backfire.
 
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Old Aug 29, 2001 | 02:16 PM
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Loud Engine Nocking

no the chain didn't break. i just replaced it with and all metal one. i checked the pushrods and they all seemed fine.
 
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Old Aug 29, 2001 | 05:24 PM
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Loud Engine Nocking

 
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