Whoops!

[Gnasher]

I've just got back from putting some miles on the new brakes, all new discs & red stuff pads. I had a problem with the engine ticking over at about 2200 rpm. A problem in traffic as the temp started to creep up, not to mention being noisy.

The bible says tickover problem is likely to be the stepper motor, so I took it out & cleaned it. It didn't seem to move very freely so I compressed it and pulled it out a couple of times. On the third time I pulled the end off it!

It seems I will need a new one, but just how freely should it go in & out?

SteveD

[tvr4ever]

I always thought they weren't supposed to move in or out without being connected to the ECU.

[V8 GRF]

I did't think they can move without been powered. Don't be tempted to buy one off ebay they seem to be cheaper (probably chinese) pattern parts and don't work properly.

[Gnasher]

Yep, it looks like it.

I saw the spring & just didn't think through how it worked.

Ho hum. A £100 lesson I think, having read bad reports about the cheap Ebay ones I'd better get a proper one.

[cinquecento]

trying screwing the needle back in.. worked for me.

[fastandcurious]

My Griff 500 was ticking over at about 1300-1400rpm. I did all the usual stepper motor cleaning etc. It didn't the slightest bit of difference. I wound the air screw right in then backed it off 1/4 of a turn. I now have a perfect 800 rpm tickover.

[Gnasher]

I did think of just screwing it back in & refitting it, but I've got 2 trips to France planned in the next 8 weeks, so I need to be confident it will work.

Once I've got a known reliable stepper motor I will move onto the other possible solutions.

Thanks to everyone for your ideas.

SteveD