Discussion
Got the motor last weekend, so not had much opportunity to give it a blat since. Took it to work today as the Suns out 
, usual bumper to bumper traffic on the A/B roads quick blat up the Motorway. On the way home Lumpy as f**k in low revs in the traffic and when I got it home still lumpy, like its chomping at the bit. Straight in garage to clean the stepper motor, 5 minute job thankfully, it now all seems OK. I'll find out tomorrow if it’s properly cured, as the Suns putting in an appearance again
Questions
1. How regularly do you clean the Stepper Motor?
2. Is the HC more prone to this than standard lumps?
3. Are there any other common causes of rough low rev driving, apart for it's a TVR they all do that!
Harry and a Green V8S(HC)
, usual bumper to bumper traffic on the A/B roads quick blat up the Motorway. On the way home Lumpy as f**k in low revs in the traffic and when I got it home still lumpy, like its chomping at the bit. Straight in garage to clean the stepper motor, 5 minute job thankfully, it now all seems OK. I'll find out tomorrow if it’s properly cured, as the Suns putting in an appearance again Questions
1. How regularly do you clean the Stepper Motor?
2. Is the HC more prone to this than standard lumps?
3. Are there any other common causes of rough low rev driving, apart for it's a TVR they all do that!
Harry and a Green V8S(HC)
quote:
Got the motor last weekend, so not had much opportunity to give it a blat since. Took it to work today as the Suns out
Questions
1. How regularly do you clean the Stepper Motor?
2. Is the HC more prone to this than standard lumps?
3. Are there any other common causes of rough low rev driving, apart for it's a TVR they all do that!
Harry and a Green V8S(HC)
Could be dirty plugs if it hasn't had a good blast for a while? Or fuel vaporisation. Or a dodgy throttle pot, or coil breaking down in the heat. Or any of a hundred and one other things. If you take it for a good blast and it still does it the next day I'd wonder if it is getting due for a service. If a service doesn't help may be time to start looking for a faulty sensor or ignition problem.
Cheers,
Peter Humphries (and a green V8S)
Cheers Peter, rely on you to help/post, under-whelmed by all the other replies though!! (what’s a stepper motor, you may well ask, well its this.......!!)
The car was noticeably smoother today on the way to work, also gave it a good blat after finishing work at lunchtime for an hour, my how they eat petrol.
Also took the opportunity to brim it with optimax, will try a few tank fulls to see if smooths things out further, seems to have good comments posted here. Service is due April, may bring it forward as most of your points should be diagnosed by plugging in the gizmo thingamajig or covered as part of the service.
Harry
The car was noticeably smoother today on the way to work, also gave it a good blat after finishing work at lunchtime for an hour, my how they eat petrol
. Also took the opportunity to brim it with optimax, will try a few tank fulls to see if smooths things out further, seems to have good comments posted here. Service is due April, may bring it forward as most of your points should be diagnosed by plugging in the gizmo thingamajig or covered as part of the service.
Harry
Just had another thought, my Omegod will pull me along in traffic just on the ECU maintaining tickover, up to 4th gear smoothly, with no shunting. I do not expect the TVR to do quite the same. However I was expecting it to be smoother, or am I expecting too much from it? Is it because they have too wild a cam to contemplate anything below 1500/2000rpm smoothly?
Bottom line, is smooth progress realistic for a TVR in traffic sub 1500rpm? or is lumpy progress normal?
Any replies gratefully received, as your answers may convince me that I may not need to get it serviced earlier
after all.
Harry
Bottom line, is smooth progress realistic for a TVR in traffic sub 1500rpm? or is lumpy progress normal?
Any replies gratefully received, as your answers may convince me that I may not need to get it serviced earlier
after all. Harry
quote:
Just had another thought, my Omegod will pull me along in traffic just on the ECU maintaining tickover, up to 4th gear smoothly, with no shunting. I do not expect the TVR to do quite the same. However I was expecting it to be smoother, or am I expecting too much from it?
Typically get a bit hickuppy and start getting into drive line shunt somewhere between 1000 and 1500 rpm, between 1500 and 2000 is a slightly grey area where it will normally be happy but if the engine is slightly off tune (too hot, needs plugs cleaning or whatever) it may not be completely happy. Above 2000 rpm it should be complete docile. All this is just trickling along. If you put your foot down it should pull cleanly from about 400 rpm upwards.
Cheers,
Peter Humphries (and a green V8S)
Harry,
Can't talk about stepper motors - don't know what mine looks like yet.
There have been some threads on idling when cold / rough tickover when started etc and I have found that when I start mine from cold it will go to 2000 rpm briefly then settle down, but if you raise the revs too quickly as you pull away it coughs a bit - if I keep it down till I'm down the road a bit its ok and it seems fine in traffic etc.
It isn't as smooth as the V6 was though, but much better in every other way. I think its set up to run a bit rich as I can get the odd whiff of petrol when it first starts (no leaks or anything) and it pops nicely on the overun
. Seems to be since it was at Thames Valley Racetech for a new rad and Steve said he'd give it the once over.
Let us know how you get on, this is almost like a Green V8S register these days.
Cheers,
JSG.
Can't talk about stepper motors - don't know what mine looks like yet.
There have been some threads on idling when cold / rough tickover when started etc and I have found that when I start mine from cold it will go to 2000 rpm briefly then settle down, but if you raise the revs too quickly as you pull away it coughs a bit - if I keep it down till I'm down the road a bit its ok and it seems fine in traffic etc.
It isn't as smooth as the V6 was though, but much better in every other way. I think its set up to run a bit rich as I can get the odd whiff of petrol when it first starts (no leaks or anything) and it pops nicely on the overun
. Seems to be since it was at Thames Valley Racetech for a new rad and Steve said he'd give it the once over. Let us know how you get on, this is almost like a Green V8S register these days.
Cheers,
JSG.
Typically get a bit hickuppy and start getting into drive line shunt somewhere between 1000 and 1500 rpm, between 1500 and 2000 is a slightly grey area where it will normally be happy but if the engine is slightly off tune (too hot, needs plugs cleaning or whatever) it may not be completely happy. Above 2000 rpm it should be complete docile. All this is just trickling along. If you put your foot down it should pull cleanly from about 400 rpm upwards.
Cheers,
Peter Humphries (and a green V8S)
Thanx Peter, you've just described almost exactly what mine does, 1000-1500 concur, although not too much shunt felt (all pretty tight) & 1500-2000 not running hot at all firm 80 on the move 90 in traffic, perhaps it just needs the service to smooth it out a bit more, but not bad enough to bring the service forward from April, just the parnoia setting in.
Not too sure about it being docile above 2000 though, seems to carry on to 5000 very quickly
It ticks over at 900/1000 so not sure how I can get it to pull from 400, bar slipping the clutch with a 2nd gear start!
JSG; Starts at 2000 concur then by the time pulled out of garage and closed door drops to about 12/1400, then down to normal after a few minutes in this cold weather. Yep even with Cats pops and gurgles luverly on the overrun, the great shame is that it sounds nicer if your outside when it goes past!!
Many thanx for replies I can now rest easily at night.
Harry
Cheers,
Peter Humphries (and a green V8S)
Thanx Peter, you've just described almost exactly what mine does, 1000-1500 concur, although not too much shunt felt (all pretty tight) & 1500-2000 not running hot at all firm 80 on the move 90 in traffic, perhaps it just needs the service to smooth it out a bit more, but not bad enough to bring the service forward from April, just the parnoia setting in.
Not too sure about it being docile above 2000 though, seems to carry on to 5000 very quickly
It ticks over at 900/1000 so not sure how I can get it to pull from 400, bar slipping the clutch with a 2nd gear start!
JSG; Starts at 2000 concur then by the time pulled out of garage and closed door drops to about 12/1400, then down to normal after a few minutes in this cold weather. Yep even with Cats pops and gurgles luverly on the overrun, the great shame is that it sounds nicer if your outside when it goes past!!
Many thanx for replies I can now rest easily at night.
Harry
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