cherokee help

[imthehink]

When I reach 45 mph and accelerate, I hear a rattleing/clicking noise. It goes away at around 50-55 mph or when I floor it. It sounds kind of like the lifters, but I don't think that's what it is. Any suggestions on what it might be. Any help would be great. thanks

[Chucks XJ]

It might just need the valve adjustment.

[Davisrats]

Detonation or ping in the engine (pre-ignition)? Flexplate? Rattle can be a lot of different noises. Manual or auto? Tin work around the exhaust?

If you think it is pinging try better gas for a tank or two and see if it goes away.

[D4x4Fish]

Detonation or ping in the engine (pre-ignition)? Flexplate? Rattle can be a lot of different noises. Manual or auto? Tin work around the exhaust?

If you think it is pinging try better gas for a tank or two and see if it goes away.

I agree.
I dont think it would be the lifters

[bjnrae]

Detonation....Timing, Gas, Lean etc...