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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Slow pickup problem

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Old Feb 16, 2009 | 11:28 AM
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Slow pickup problem

It's been a while since I been here, but I've been viewing every once in a while to see if their is already a thread covering my other problem with my truck. I didn't see one and it's like 1000-something pages to view, so I'll post it now.

I figured out what the piging sound in my engine was: a bent push rod. My oil leak problem is the rear main seal. However, I seem to have a new problem. Allow me to explain so you can see if it actually IS a problem.

I bought this truck for $300 from a friend that I used to work with. It actually drove home. I was astonished to say the least. It's a three on the floor with an overdrive, 1987 ford f-150, with the awesome 300 inline 6-cylinder. It's grannied low but I've never had something this low. It takes me a full five or more seconds to get off the line. Like it no matter how much I mash the gas it still takes a god-aweful time to move. I almost got speared by another car coming out of work and I'd had plenty of time in any other vehicle. Somebody says it could be the rear-end. I'm no mechanic, I just replace parts and even then I use a book to make sure I don't screw things up. Can you guys help a brother out? I'd be very grateful!
 
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Old Feb 16, 2009 | 11:32 AM
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not enough info.


read codes, do tuneup, check exhaust back pressure.
 
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Old Feb 16, 2009 | 11:46 AM
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Originally Posted by quicklook2
not enough info.


read codes, do tuneup, check exhaust back pressure.
How do you check exhaust back pressure?

Cool, thanks. It's just that imagine pushing the gas to the floor and going nowhere for about 5 or so seconds, THEN it decides to move but sluggishly. It finally gets up to speed like other vehicles but takes too long to get off the line at the light. I had people honking at me. So I just drove it home a parked it. It's been sitting there making me feel guilty and I really like this old junker. It's my poop brown Millenium Falcon!
 
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Old Feb 16, 2009 | 11:54 AM
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might be a clogged cat...i don't know how to check backpressure either so don't feel bad what you could do is cut off the pipe after the cat and move it aside and look in the cat with a flashlight and see if it's clogged and if not just put a band clamp on the exhaust and look for some other reason it's slow

in my experiance with a rear end they are usually noticable when they go bad like grinding or whining at high speeds or making loud CLUNKS every one i've blown up has shown signs of blowing up before it actually went. lol on the last one i blew i made a hole in the floor when the spider gears decided shoot out of the 10bolt rear through the floor lol
 
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Old Feb 16, 2009 | 12:06 PM
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you use a vacuum gauge to check back pressure and a whole lot more.
 
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Old Feb 16, 2009 | 12:29 PM
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This is a manual truck if I understand your description correctly, so are you saying you can release the clutch from a stop and the motor revs but the truck doesn't move? If so the clutch is most likely gonzo. If that's not the cae does it make any grinding or other noises?
 
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Old Feb 16, 2009 | 01:21 PM
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Originally Posted by Conanski
This is a manual truck if I understand your description correctly, so are you saying you can release the clutch from a stop and the motor revs but the truck doesn't move? If so the clutch is most likely gonzo. If that's not the cae does it make any grinding or other noises?
Yessir, he is a standard, but no grinding sound that I know of, the shifter you have to kinda muscle a bit, but it's 22 years old and I don't know if they ever did any kind of work to it. When I replaced the exhaust manifold gasket, it was crusted on so I doubt they ever replaced it when they owned it. It eventually takes off, but it takes it's sweet time. I wish you could all see it, 'cause it's kind of hard to describe other than what I
ve already said. I'll take a look at the cat to see if it's clogged. It has the original exhaust on it. So that could be it. Then the codes. I'm pretty sure this thing needs a tune-up since I don't know it's maintenance history. I mean, it's got a layer of grease so bad, I used four cans of degreaser on it and it's STILL THERE. I appreciate your help guys! If that's not it, I'll get back to you.
 
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Old Feb 16, 2009 | 01:29 PM
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start with the basics.

again, you are not saying much.

did you change air filter, plugs, oil or ?????
 
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