bucking bronco

[shotiime91]

First gear any rpm, when i pin it it starts to buck badly-put it second and it quits-no idea-i have new crank sensor, dynomax cat back, larger maf 80mm, doesnt happen all the time but most of the time-buddy laughed at me cuz his escalade almost ended up in my trunk. revs out in every gear to redline except first when i really want it to go it wont.

 

[Ishodu]

Let my guess? Its a 80mm MAF from another ford car? If so you need a chip to make it work correctly. Unless its a Proflo.

 

[shotiime91]

It is-but it worked fine for while-is it a lean thing-cuz it is worse when it is cool out side like it is tonite.

 

[Ishodu]

Its lean, keep using it and not only will it run bad you may risk killing the engine.