m20 lurching after about 5500

[kvvikdrawmcgraw]

Violent lurches at about 5500, if i let off the gas, let rpm lessen, and it smooths and and continues normal driving. A Bavauto chip was installed by the previous owner, does that require different injectors or am i thinking about this the wrong way?

[long tall eta]

is it an e car? sounds like the rev limiter kicking in.

[jlevie]

Check to see if the WOT switch in the TPS is good. After that I'd suspect the engine timing sensor(s) or the fuel system.

[kvvikdrawmcgraw]

Its an 325is, I'll get on checking that switch

[nomansland92]

Mine did this when my cap and rotor went bad. I'd you haven't recently done a tune up id suggest a cap, rotor, plugs, wires and check you coil while your at it.