shaky hard acceleration

[jmcgahran]

2000 5speed 4x4. When I accelerater between 2700-3000 rpm I get a whole car front to back shake. The engine runs perfect through this. This only happens when I am giving it quarter to half throttle. If its floored you don't feel this. This only happens in second gear, maybe a little in third when your merging on a highway. Any ideas?

 

[VanSR504]

Tires

Might check your tires see if they are balanced or might even have problems. This happen to my wife car.

 

[theizzardking]

Might check your tires see if they are balanced or might even have problems. This happen to my wife car.

^this, only at a certain speed then goes away at higher speeds definitely sounds like some sort of tire problem, wear, balance ect...get the tires checked

 

[jmcgahran]

It doesn't relate to speed. Its quarter to half throttle at 2700-3000 rpm in all gears except first. I only normally feel it in second because I'm normally not at half throttle in any higher gear.

 

[nevada]

check the u-joints closely.

also, you said the engine is running well, but, how do you know?
what you're describing sounds like a bad miss.

when were the plugs changed last? how do they look now?

 

[CanadianTRD]

DEFINITELY check your plugs, wires, MAF and TB in that order.

If all these components are in working order, THEN inspect driveline/tires/suspension components.

What Nevada said, this sounds like textbook misfiring to me...

 

[jmcgahran]

I checked the plug wires, the plugs are new. The closest wire boot to the back left is brown with white flakes. The rest are black. Should I replace this wire. I'm thinking a misfire under load.