Twellsie

iTrader: (1)

upon returning hame from central day, it appears my car will not rev past 2.5k, seemed ok from cold, but once upto temp does not rev at all

J1mbo

iTrader: (1)

you been on the beer ?

Twellsie

iTrader: (1)

the missus is watching a film, its dark, so i am having to touch type, badly, lol

J1mbo

iTrader: (1)

sorry im not more helpful lol,

i THINK ! the engine wont rev above a certain rpm when the ecu goes into "limp home mode"

if im honest i dont know what would cause this to happen,

you could try unplugging the ecu then putting it back in and try, !??!

jim

Twellsie

iTrader: (1)

that is along the lines of what i was thinking, i believe the L8 will try and guess the parameters if a sensor fails, but when other sensors go beyond what the ECU is capable of calculating it will put it into limp home?

JTECH James

iTrader: (13)

ive never heard of an L8 doing this, but it may well be able to

J1mbo

iTrader: (1)

im not sure if it does that if a sensor fails,

a saff last week had a air temp sensor fail and still revved normal, just fueling was not correct and it missed sometimes,

do you have acess to a engine monitor, this will show you whats happening matey

WongRS

iTrader: (11)

what is it with mine and your saffs lately, Twellsie?
They keep going tits up simultaniously!

Twellsie

iTrader: (1)

dont know matey, but i saw a ditch that looked quite inviting on the way home


but to be fair, when its fixed, its going, I need a couple of cosworth free years, lol

WongRS

iTrader: (11)

atleast yours made it there! haha

but when its fixed, you wont want to sell it.

Twellsie

iTrader: (1)

to be honest, i think i have had enough of all, its taken me 5 years of getting it to be how i want it to be, so finish these bits, new clutch, new brakes fix what ever issue this is, and its gone


just been to put the car away and it seems to be teperature related as it will now rev to 5.5k rpm

Twellsie

iTrader: (1)

Up for the morning crew

Char1ie

iTrader: (6)

I have a similar problem which is driving me nuts! Cold the car is very rapid and runs perfect, then it gets hot after a lap on full boost and starts misfiring around 4k and won't go any faster. Weirdly right hand coners make the problem better, left hand corners make it worse. I'm tempted to send mine to the menders for this one cos I am stumped.

Obviously this doesn't help you Twellsie but I'm interested in any ideas on what heat related causes are likely.


Charlie

Tim

iTrader: (1)

Crank sensor or phase

Twellsie

iTrader: (1)

how would they be temperature related? ie seems fine from cold, but as it warms up, it gets worse

CombatSapph

As the engine warms up the gap between the cranks sensor and trigger wheel changes. As another poster aludes to, turning can change the gap if the sensor is loose - i.e turning right the gap closes, turning left the gap increases causing dropped sparks and missfires.

I had the same issue on the Westfield - driving home one day it wouldn't rev past 3k - nursed it home and on inspection the bolt securing the sensor had simply vanished.

rsnissan

iTrader: (9)

blue water temp sensor in head?

rsnissan

iTrader: (9)

i would have said if it was crank or phase it would missfire as well.

Char1ie

iTrader: (6)

I've checked both of these on my car. CPS is tight and gapped at .8mm. Phase sensor is tight, looks brand new and is gapped at a hairline (can't remember the exact figure but very close).

On the subject of the water temp sensor I idled my car until the water temp guage was above the halfway mark then went out on track. No problem. The after one lap when the turbo got properly hot the trouble started.

Anyway, sorry Twellsie I'm hijacking your thread so I'll stop now.

Charlie

rsnissan

iTrader: (9)

have you tried a new ignition amp?

cozmeister

iTrader: (1)

0.2-0.3 mm for the phase sensor

If it's changing depending on which corner you take, it'll be something working just a bit loose, or chafing/shorting on some metal work.

Char1ie

iTrader: (6)

New coil, new plugs, new leads.

Charlie

rsnissan

iTrader: (9)

id give the amp try it might be going tits up once warm.

panelbeater

personally i'd be dropping it of with karl saving you all the agro of pissing around

Twellsie

iTrader: (1)

apart from having to take 2 cars upto Derbyshire to drop the car off, then having to take 2 cars back up to collect it, lol

Matt Evans

Hope you get it sorted rich!

Failing that, get rid and buy summat reliable, red and japanese!!

Twellsie

iTrader: (1)

a Koi? I have got a pond full of them matey,

Matt Evans

PMSL! Have they got MO's on them as well??