M156 RTM Seems like all the R8s I spot in the wild are nightfire and grey near the M62, strange coincidence but either way here you go Don't know if they realised I was in the same car or not when they passed but once again it was a strange thing to see approaching in the mirror :laughing2 Video: ht...

Was unaware of the technical articles directly on this site but thats helped a lot. In other news, after a bit of research, whilst its not immediately obvious, it would appear that the Rover Mini SPi uses a very similar throttle body design where the stepper motor is integrated into the throttle bod...

Interesting. To run steadily at 1500 rpm, I would think the engine needs to be getting sufficient air. I'm suspicious that the throttle valve may be slightly open for some reason, maybe it's stiff or being held open by the stepping motor even when it's disconnected. Or it could be air getting in by...

Right problem solved, it’s both the stepper motor AND lambda sensor. If the stepper motor is plugged in and the lambda is disconnected the problem is still there, the same is true in reverse. But if both are unplugged, sure the idle is at 1500rpm but there’s no fluctuation and the idle never leaves ...

Yeah made sure the cable was tightened to a decent amount the other day so I think that's alright. I do think its either the tps or the stepper motor. The tps is very easy to replace, the stepper motor is bolted onto the throttle body inside a metal housing because its the alloy inlet so theres no ...

One very simple thing to check is to make sure the throttle is properly closing at the air intake. A bit of resistance in the accelerator cable or stiffness round the throttle spindle may make it stay a bit open. Easy to check by pushing it gently to see if it still slightly open. The stepping moto...

Here https://youtu.be/0KCZRgu9F-E?si=_9yXPXbYrVEaLvjC This video will be really useful for diagnosing the problem. It’s long but it makes it very obvious what’s happening and I think someone might pick up on what it is based on how it’s behaving in that video, it’s very linear and predictable at times

The thing with the smoke issue is I don’t even think it’s head gasket because it goes away and there’s no other telltale signs of it existing. It happens a few times but only after I try to reset the stepper motor too many times. But then again I have no idea what it could be other that head gasket ...

I mean it doesn’t act normally when driving really, hills and maintaining speed is okay, the second you come on or come off the throttle the whole car violently lurches or jumps a few times before returning to a smooth acceleration/deceleration, especially if you press the throttle to the floor quit...

I think I was actually wrong. This whole ordeal keeps getting more and more confusing. I spent today messing around with literally everything. Ran it without any vacuum lines attached, unplugged the lambda sensor, tested multiple states of the stepper motor by unplugging it randomly. One thing I did...