Struggling to tick over

[disco bob]

For the first time since i have had the car it really stuggled to tick over this morning.
Car started first time as normal but after i reversed out of the garage just using the idle,i touched the throttle and it died on me.
Then i left it for a bit so as not to flood it and it just managed to fire up but it was very lumpy.
This also happened when i left work at dinner.
I cleaned the stepper motor a couple of weeks ago is there anything else i can check or is it because the weathers turned colder and i need to let it warm up before i set off.
cheers disco bob.
p.s car was ok as soon as i got on the move.

>>> Edited by disco bob on Tuesday 14th September 17:23

[Boosted Ls1]

Try introducing an air leak and see if the revs pick up. If so it could be the stepper motor or what about the throttle plate being closed to much? I'd suspect the stepper motor first.

[griffdude]

Ditto suspect stepper motor fault. Have you tried sealing the threads with PTFE tape? You can get this from plumbers/diy shops(tip pinched from bible that I used myself & did the trick). The electrical connections from the stepper motor? Try to double check these with a meter.

[jessica]

hey I am having similair probs with my 97 500 chim.

Cleaned stepper two months ago re-cleaned today not dirty.
checked wiring to temp sender,and juggled the ECE.

checked all plugs

car running very lumpy at 14-18 thousand revs and low throttle.

very obvious in third.
Like a kangaroo (not quite) but getting there.

any suggestions??




>> Edited by jessica on Tuesday 14th September 22:51

[ntel]

jessica said:

car running very lumpy at 14-18 thousand revs and low throttle. >> Edited by jessica on Tuesday 14th September 22:51

no wonder its lumpy

Just a thought. When you clean the stepper motor valve plug do you also clean the valve seat? I usually clean this with a cotton bud. The seat is normally dirtier than the plug.

[jessica]

ntel said:

jessica said: car running very lumpy at 14-18 thousand revs and low throttle. >> Edited by jessica on Tuesday 14th September 22:51 no wonder its lumpy Just a thought. When you clean the stepper motor valve plug do you also clean the valve seat? I usually clean this with a cotton bud. The seat is normally dirtier than the plug.

I cleaned the motor and the chamber yes.


>> Edited by jessica on Wednesday 15th September 17:21

[david beer]

For the light throttle lumpy job, try running with the vacuum advance off. Cured mine and several others also.

[Peterc]

Ignore throttle pot and check electrics.
Lumpy running can be linked to other problems such as a failing coil, failed temperature senser screwing up the engine management & fueling etc.

[Peterc]

Ignore throttle pot and check electrics.
Lumpy running can be linked to other problems such as a failing coil, failed temperature senser screwing up the engine management & fueling etc.

[Peterc]

Ignore throttle pot and check electrics.
Lumpy running can be linked to other problems such as a failing coil, failed temperature senser screwing up the engine management & fueling etc.