need help on fox body stang?

[88PITBULL]

my stang is cutting out at 6200 rpm ,i have rev extender and a a9l with burn through chip but it still cuts out at that rpm,also my factory tach is jumping crazy,from 1000rpm to 4000 rpm at idle,but monster tach does not.any info would be apreciated thanks.ive tried new msd box,coil,distributer,

[PIMPIN]

my stang is cutting out at 6200 rpm ,i have rev extender and a a9l with burn through chip but it still cuts out at that rpm,also my factory tach is jumping crazy,from 1000rpm to 4000 rpm at idle,but monster tach does not.any info would be apreciated thanks.ive tried new msd box,coil,distributer,

Has it ever went past 6200RPM?

[88PITBULL]

man it has pulled 6900rpm

[cracker]

sounds like low air pressure in the right rear tire!! just kidding, lol!!!

[hoover112]

may be a stab in the dark but check to make sure the chip did not get knocked loose in the computer. it's happened to me before.

[HORSEpower]

The contacts on the computer have to be cleaned really well for it to make a good contact. I would check the chip connection like hoover said. What kind of motor is this that it needs to rev that high?

Kurt