Lumpy start but OK after

[gateeast]

Firstly, bought the car a week ago and almost sold it "not for me" - but I get it and whats more I LIKE IT!

Back to the question, on start up it is as lumpy as hell and mis-fires but after a while all becomes calm and free revving. Is this normal, used to Japanese cars which as I have previously stated are very different.

[GreenV8S]

May just be running very rich. Good idea to ask your preferred TVR specialist what they make of it. Has it been serviced recently?

[gateeast]

About 2000 miles ago by Nick Whale - I assume a good garage. Just been reading about Stepper motor, could it be this?

[Big Al.]

gateeast said:

Just been reading about Stepper motor, could it be this?

OH

Can often be the cause of a lumpy tickover.

BTW big welcome to the forum.

[gateeast]

Many thanks.

Tick over is OK - once warm (not at full temp but after lumpy bit) sorry for the technical desciption!

[Big Al.]

I'd clean it anyway, one less potential problem to rule out.

[GreenV8S]

Lumpy tickover? Not really. Stepper motor problems can cause an eratic idle speed but souldn't make it lumpy.

[gateeast]

Lumpy start more than tickover.

[gavnn]

Id go with the stepper motor to, mine has died a couple of times, its like your choke is not working in car with carboretta, does the same sort of thing on injection car as far as i can tell, im no expert mind.

[bigdods]

My 450 is a bit like that - So now I start her up (be sure not to touch the accelerator to 'help' her along) then let her tick over on the drive for about a minute (its all it takes) - after that shes fine. But try to drive away before that and its stutter misfire and die ....