sudden drop in revs when idleing

[ZCoupe]

hi guys,

last weekend i noticed that when i start the engine the cerb as about 1000 revs when idleing
after so time the revs all of a sudden drop to 500.
with out doing anything the engine stops or goes back to around 900revs.

happend a couple of times

Any ideas on this?

thx

[arebrec]

This was one of the symptoms I had when the big 100amp fuse went on me, so might be worth checking that.

[ZCoupe]

arebrec said:

This was one of the symptoms I had when the big 100amp fuse went on me, so might be worth checking that.

that happend to me some months ago... on a big and bussy cross croad

[arebrec]

ZCoupe said:

arebrec said:

This was one of the symptoms I had when the big 100amp fuse went on me, so might be worth checking that.

that happend to me some months ago... on a big and bussy cross croad

seems to happen at the most awkward times, mine was in a single carriageway tunnel, thankfully just made it out, otherwise would have caused a lot of trouble!!

well if you've ruled out the big fuse then I can no longer help, sorry I'm sure someone will be along soon who can though!!

[ZCoupe]

arebrec said:

ZCoupe said:

arebrec said:

This was one of the symptoms I had when the big 100amp fuse went on me, so might be worth checking that.

that happend to me some months ago... on a big and bussy cross croad

seems to happen at the most awkward times, mine was in a single carriageway tunnel, thankfully just made it out, otherwise would have caused a lot of trouble!!

well if you've ruled out the big fuse then I can no longer help, sorry I'm sure someone will be along soon who can though!!

thanks for you help. perhaps you are even right.
but, knowing TVR, she might repair herself

[stuthemong]

this sort of thing is a laptop to diag really I think

[madmatt1985]

ZCoupe said:

knowing TVR, she might repair herself

i hope my cerb turns out to be like yours in the long run lol

[grahamn]

I had that on mine, turned out to be a doggy throttle pot.

[ZCoupe]

grahamn said:

I had that on mine, turned out to be a doggy throttle pot.

good idea i will check that

thx

[ZCoupe]

madmatt1985 said:

ZCoupe said:

knowing TVR, she might repair herself

i hope my cerb turns out to be like yours in the long run lol

happend before, with the cooling system

[Pappa Lurve]

Same problem on mine and it was the throttle pot. Only got it back last week and done maybe 60 miles on the car since then but it does seem to have solved the problem.