I got my car back from Holeshot today,I took it out and it ran fine, after about 6 miles it started running lumpy almost as if it was overfueling, or
a pug not working 100%, It then cleared itself and was fine for about 2minutes and the running rough again,
The engine bay temperature is really hot and im wondering if the leads or coils could be breaking down, or I need a new set of plugs, it deffinatley
stays on 4 cylinders,
it also seems to run hot really quickly at low speeds so I think i need to get more air flow into the nose cone, oil temp seems to be about 90-110,
Any help appreciated, ill be gutted if I dont make Snetterton
[Edited on 27/8/06 by dilley]
Make sure that if you have an electric rad fan, that it is wired to go with the airflow.
Stationary your engine will be cooled, but at speed it will be fighting the airflow and cook your engine.
I did my head gasket last week before I realised!!!!!
All is well now though
Just been out tis morning, thought Id ty it when everything is cool, as soon as it comes on boost it spluters, when I let off its popping, HELP
running lean?? plug breaking down????
any ideas please!!!!!!!!!!!!!!!!!!!!!!!!!!!
get it back to holeshot..
Are all air hoses fitted where they should be? Is it on carbs?
Is the tank baffled? The reason I ask this is if it ran fine on the dyno but runs poorly on the road, it could be fuel starvation from the fuel
sloshing about in the tank.
It's always difficult to know where to point you without looking at it....
[Edited on 26/8/06 by Coose]
It did run fine on the road for a few miles and then started to play up, yes the tank is baffled, does popping when coming off the throttle point to
running lean?
Yes its on carbs and all the hoses are where they should be, its not had new plugs though,
Id love to get it back to holeshot but they are 180 miles away, so at the mo after spending out loads of money im really p!ssed off
[Edited on 26/8/06 by dilley]
[Edited on 26/8/06 by dilley]
quote:
Originally posted by dilley
Id love to get it back to holeshot but they are 180 miles away, so at the mo after spending out loads of money im really p!ssed off
popping on overrun is i believe down to unburnt fuel in the exhaust, which means rich. Spluttering is rich, stuttering (hesitating) is weak, as far as
i know. 
I cant understand how it can be fine for a few miles and then startto play up, it did claer for a few seconds.
If a plug was breaking down would this cause unburnt fuel??
[Edited on 26/8/06 by dilley]
i believe so. If it is running as hot as you say, you might've cracked it/them. My friend tells me that when a car misfires, the first thing he
does is change the plugs, as this solves it most of the time. Certainly did in my 406 when it overheated and cracked the plugs.
but you say it is spluttering but not misfiring?
its a bit hard to tell, even when revd up on the spot at about 4k it runs slightly lumpy, it doesnt sound like it goes on to 3 cylinders, but when you
go down the road and it trys to boost it doesnt want to know, it sounds like overfuelling but im not sure, I know yhat before it went on the rollinhg
road it was runni8ng rich and they had to rejet the carbs to bring it down, I ran the engine quite a lot before it went , just wondering if its
knackered the plugs.
Holeshot arent open today.
[Edited on 26/8/06 by dilley]
for the sack of £?? go and buy some more plugs but normaly when a plugs gone it doesnt clear,one might be breaking down tho ,you'll want new plugs in it anyway and maybe go for colder ones
Just found out out its got the wrong plugs in it
Did they put those in? Maybe theyve put different plugs than standard to cope with the turbo install.
Have you checked the fuel pressure regulator? I think my mate's turbo busa uses a variable regulator that varies with boost, if the hose is
blocked or has come off then it won't be varying the fulling in line with the boost pressure.
Changed the plugs as holeshot didnt, its still the same, and i even got a pop from the exhaust when i switched it off, could there be somthing
sticking in one of the carbs??
it has got a variable pressure regulator the pipes are fine.
Is the pressure actually increasing though, do you have any way of testing the rising rate of the regulator with a guage etc?
I dont think I have any way of checking it, I have removed the air plenum and found that where one of the connectors is welded on has a small hole, this connects to a pipe about 15mm straight in the middle of the carbs, when blown into the carbs open up, what is this??
This is not right....
Get it back to Holeshot.
The longer you leave it and the more self diagnostics you do, the more likely they are to say 'it was fine when it left here'
They are reputable tuners, and should sort it for you.
Im assuming that if this pipe is leaking then it wiont maintain pressure,causing it to run rich??
The car has got to go back, am I entitled to ask holeshot to collect it??
what would you lot do??
technically yes i suppose, especially considering the money paid. However, not necessarily the most diplomatic way to set about getting it fixed? That said, you've paid enough to deserve looking after. Id say yes overall.
To be honest I wouldnt sour the relationship yet by demanding they collect it, I'd offer to take it down yourself but explain that you do feel a
bit agreived that you need to do that having spent that amount of time and money with them. You never know, they might offer to collect it anyway or
maybe give you some freebies etc to soften the blow, but even if none of this happens on this occasion I think you'll be worse off if you start
playing hardball straight away and they refuse.
[Edited on 27/8/06 by ChrisGamlin]
quote:
Originally posted by dilley
Im assuming that if this pipe is leaking then it wiont maintain pressure,causing it to run rich??
I managed to seal it and it made no difference, Im going to leave it to them.
Ive fixed it!!!!!!!
blocked main jet on number 2, a little piece of plastic
Just got back from a trip out in the rain, its not a nice experiance
will be at snetterton now, shame i didnt get the new bonnett and side panel back on, it drives like an absolute pig, i need some serious suspenson
adjustment and throw away those stupid 17" rims.
thanks for everyones help.
Andrew.
nice one
Its really done my head in this weekend, just need a new diff
i know some one else selling a 3.38 diff if your intrested
Theres a 3.14 lsd on ebay reserve is£380, I really want a 3.38 or 3.14 with bolt on shafts and prefferably lsd, or can they be converted easily?
Good to see its running again OK. Any idea where the bit of plastic has come from though, might be worth checking your pump etc to make sure its not breaking up maybe, and probably worth putting in a filter downstream of the pump if you havent already got one.
not sure how hard it is to convert because i just give my m8 a 3.62 lsd diff and the 3.38 and he does it for me £40
The fuel pump is new as is the filter, I think it must have found its way in on rebuild.
ox how much is the diff then?? pm me.
[Edited on 28/8/06 by dilley]