I am having a similar issue.

Car stutters on hard acceleration asif I have taken foot off throttle - like a rev limiter/traction control.

I have no fault codes showing.

Lambda has been replaced.

Driven with new Lambda unplugged - no cure

Driven with the MAF unplugged - no cure

Air leak test - no leaks

Replaced plugs (NGK Platinum) and leads

Coil pack changed

Crank shaft position sensor replaced (Cables all in excellent condition)


I took my car to Tony McQuire at Pumaspeed last Friday for him to diagnose and advise. He took it out and felt it, plugged in the laptop and I drove him around while he watched what was going on - saw fluctuation at the MAF, but prooved the MAF is functioning etc etc, checked over the engine (Inlet Manifold Control valve) and he had no suggestions, no cure, and car still stuttering.

The car gets used a lot, I am not a gentle driver if I am honest, have been doing around 1000-2000 miles per month. So it shouldn't have blocked injectors or anything like this. I am still driving the car with fault, and if I drive moderately then it feels fine. Sometime while holding a steady 80mph can feel the throttle fluctuating, and it won't accelerate above 85mph without buckaroo'ing. Not pretty.

Chris