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Discussion Starter #1 (Edited)
Hi, so i have a 87 Hardbody 4x4 with the Z24 motor, it has 290,650km on it runs good. The problem is when I am driving in 2nd 3rd or 4th and the revs are over 3000 and I give it more then half gas the truck starts to shudder/bog down, it does slowly speed up but does not power through the shudder/bogging. If i take the air cleaner cover off it does get better but is still there. Any ideas of what it could be? I put some fuel system cleaner in the tank tonight and I am going to change all 8 plugs tomorrow in the morning.

Thanks
Matt
 

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My first thought is 'fuel pump.'

Changing the plugs is always a good move, if you think they are due. A tired out distributor, and cap, could also be "harshing your spark."
 

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Discussion Starter #4
One of the plug wires had popped off the cap so it wasn't noticeable but when i changed the plugs i made sure that they were all seated properly and the shudder/bog is gone. Thanks for the help

Matt
 
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