OK, so I've got a misfire
Discussion
...up around the 4-5000rpm mark. It's not a "will it, won't it" misfire, just a very slight hiccough or few on the way up the rev range. Only happens when I'm giving it the berries - the car pootles just fine.
Having searched the archives (do I get a gold star?) the advice seems to be to check plugs/leads/dizzy before going looking for anything more sinister.
Plugs and leads I can check (just about). Leads are less than 10000 miles old, and look in good nick, but were bought from Halfords in lengths to match the existing set. Extenders could be an issue - I've already had two give up, so the other six could be up for replacement. However, removing and possibly cleaning the dizzy cap is just into scary territory, given as I've never done it before. Any general advice on poking around there before I go and make a big expensive driveway ornament?
Having searched the archives (do I get a gold star?) the advice seems to be to check plugs/leads/dizzy before going looking for anything more sinister.
Plugs and leads I can check (just about). Leads are less than 10000 miles old, and look in good nick, but were bought from Halfords in lengths to match the existing set. Extenders could be an issue - I've already had two give up, so the other six could be up for replacement. However, removing and possibly cleaning the dizzy cap is just into scary territory, given as I've never done it before. Any general advice on poking around there before I go and make a big expensive driveway ornament?
During the winter months I was suffering misfire about 2,800-3,400 in the Griff. In the process of sorting that it now feels like a new motor.
It involved new HT leads, plugs and suppressor caps, but Dave Batty also did a good deal of cleaning off the corrosion on the dizzy. Reckon, being the perfectionist that he is, he was down to polishing with cotton wool.
Anyway, that's just the treatment it needed. You couldn't tell the difference in the petrol you put in the tank before. Now you can feel the difference between Optimax, other Super and normal.............
It involved new HT leads, plugs and suppressor caps, but Dave Batty also did a good deal of cleaning off the corrosion on the dizzy. Reckon, being the perfectionist that he is, he was down to polishing with cotton wool.
Anyway, that's just the treatment it needed. You couldn't tell the difference in the petrol you put in the tank before. Now you can feel the difference between Optimax, other Super and normal.............
Make a note of the position of the leads on the cap before you remove it, doesn't matter how you identify them as long as it makes sense to you.
Have a look at the vacuum advance module on the side of the distributor to make sure its not loose & that the vacuum pipe to the inlet plenum is secure.
Have a look at the vacuum advance module on the side of the distributor to make sure its not loose & that the vacuum pipe to the inlet plenum is secure.
Hi all just sold a reliable TVR s2 and purchased a M reg 95 chimaera the first 2 days were the best Running fine(a good upgrade) the last 3 days not so good e.g.... day 3 take new toy for full 24k service £625 (ouch)..
day 4 find out that a new rad has been fitted total bill £1300 (big ouch).. day 5 now the car misfires at low speed take back to garage ...day 6 (today) pick up car (£160 1 new lam sensor + ht) drive home STILL Misfiring at low revs cant wait for day 7
day 4 find out that a new rad has been fitted total bill £1300 (big ouch).. day 5 now the car misfires at low speed take back to garage ...day 6 (today) pick up car (£160 1 new lam sensor + ht) drive home STILL Misfiring at low revs cant wait for day 7
Ouch! Ouch!
Had it been used much before you rushed in to save it?
Well it takes a little while to iron out all the gremlins.........in fact looking back my first few months were OK, but it's only since the last service that things have been getting really sorted.
God rested on the eigth day - so give the Chimp a day off
Had it been used much before you rushed in to save it?
Well it takes a little while to iron out all the gremlins.........in fact looking back my first few months were OK, but it's only since the last service that things have been getting really sorted.
God rested on the eigth day - so give the Chimp a day off
Marshy.
if you get you car somewhere where its pitch black, like in you garage at night. wait till your eyes get used to the dark and start the engine, you can actualy see the leads that are on their way out ! They get a sort of ready brek electrical glow !
This is a trick i was told of a long time ago, back in me dolomite days (!) but it worked then, unless tvr leads are different in some way that is !
if you get you car somewhere where its pitch black, like in you garage at night. wait till your eyes get used to the dark and start the engine, you can actualy see the leads that are on their way out ! They get a sort of ready brek electrical glow !
This is a trick i was told of a long time ago, back in me dolomite days (!) but it worked then, unless tvr leads are different in some way that is !
quote:
50k miles with full tvrsh, is it common for them to "judder" (feels like a misfire ) at 1500-1800 rpm
3rd gear (after a service) over 2000 it goes like s@it off a shovel
it still looks good and will be rescued
The misfire at around 1800rpm sounds like classic TVR V8 mismapped fuelling to me. Can be fixed by experts like Mark Adams (see oily pages). But I'd check the other possibilities first -- stepper motor, leads, vacuum pipe...
Gassing Station | Chimaera | Top of Page | What's New | My Stuff