other than determine the rotation of the crank

what signal does it send to the ECU?

would it have a hold on the fuel delivery on cranking?


cheers

Dave

 

it determines the position of the crank and if you plugged this into an osciliscope, you'd see a square wave pattern.

not sure if it has an affect on fuel delivery when cranking tho

 

yes it govens the fuel pump while running\cranking

 

mm...interesting.....



any way i can test my CPS with a voltmeter or any such device?

 

It informs the ECU of RPM effectively, based on that info it then knows how much and when to fuel/spark

Well, its one of the inputs used anyway, its not the only one though of course!

 

Turn ignition on live, DO NOT START THE CAR

you can check the resistance accross pin 3 & 4 on the ECU needs to be between 300-1200ohms

then you can check the voltage accross the CPS, same pins but test while cranking the engine. Should be at least 2v

HTH

 

BTW the ECU needs to be plugged in while testing so you will need to remove the cover off the ECU plug and then plug it back into the ECU

 

think ill just chuck my old one on and see if that works!

cheers Ryan.. can a voltmeter measure resistance ? dont think mine does



also, on cranking, if it doesnt fire up, then the plugs should be wet shouldnt they.. not just sooty and dry

 

yeah the plugs should be wet.

you sure there's petrol in the tank?

Regards readings it should have a resistance setting if not, if its got a continuity buzzer you can use that im pretty sure if i remember rightly.

unless its a real cheap tester.

 

whats the prob with it Dave?

 

im guess that it doesnt run Dean.

just a guess though

only jesting mate

 

not firing mate... was just driving it and it cut out...

thinking its a cps fault... ive double checked the timing and alls ok

compression in all 4 pots is bang on identical

on cranking then removing plugs.. just sooty and not wet at all..


must be cps??

 

i take it this isnt your car then dave?

as surely the pectel monitor would have picked up on this straight away

 

is the fuel pump running?

 

as chip has said if the fuel pump runs when cranking then the CPS is fine

 

does it

 

pump buzzes away no probs with ign on.. think is.. cant hear it when cranking.. the turning over is too loud

 

What normally happens is the pump should prime when you turn the ignition on for a few second an then stop.

Then when you crank it the pump should start up again.

I believe (but im not as familiar with the L6/L6 as some ECU's so i may be wrong) that if it turns on when cranking it means the ecu has a crank sender signal.

 

Sorry I relised you had no spark, I was wondering if your injectors were pulsing/switching?
I have a delay on starting on mine cranks over for a few secs with no spark no injectors, then it all fires up. does it every time when cold it seems?
Done it for ages now just thought it could of been sim prob as you?

 

dean, there is spark mate, just seems no fuel...


might remove the rail.. see if the injectors pulse



Chip.. als pectel boards run the fuel pump continiously once ign is on.. doesnt damage the pump btw

 

Had a map sen issue had spark but no fuel ,took ages to find doh.

 

Dave, don't forget MAP sensor earths off of one of its bolt holes also - knowing yours is mounted differently, might be worth running a small length of wire to earth to make sure?

Is your monitor showing a CPS error?

 

as bill says back right hand bolt hole is earth .

 

map is earthed.. ally mount


Bill, cant get the car to start.. so will the monitor still pick up the signals?

 

Think so Dave, at least on sensors it's using when starting, mine picked up CPS error when it wouldn't start - shame it wasn't the CPS on mine

 

Dont remove the fuel rail,
Just pull a plug of an injector and check for switching using a noid ligh or a test light/led tester.

 

or volt meter?

 

yeah you can use a buzzer on the volt meter.

as injectors are 12v igntion swtiched live and then earthed by the ECU.

So put the voltmeter to buzzer, put 1 end on pin 1 of the injector plug and the other to earth.

if its a decent enough voltmeter the buzzer should pick up the pulse.

 

buzzer? it has about 1000 switches, but no buzzer PMSL!

 

oh top voltmeter then.

halfords special was it

dear lord it must have a buzzer on it surely

 

fuck off you c*nt...


its a digital one with a peak recall (seriously)

 

you got it infront of you? get me a pic or STFU, so i can see if it has a buzzer setting.

 

pmsl.. thats MY phrase!

 

pmsl at you two. My multi meter's better than yours

 

dean.. trust me, im not trying toplay a multimeter comp with this ballet dancing queerlord!

being director for pectel ripp of... eerr pestell Looms i would hope he has a better one that me!!

 

dave there about 200% better than when you saw them


and yes i have got a sligthly better multimeter

 

Thats not all together true, if the CPS is giving incorrect readings it could still trigger the relay to arm the pump/amal/iscv.

 

right billy elliot.. heres the only multimeter i can find

 

turn it to here and touch the 2 contacts together.

Does it buzz?

 

dingy the fuel prime is trigger by the p28 on ignition live, i dont think the CPS sends the signal on ignition live as the pulley isnt spinning.