wolf cosworth

Hi,

when I start the car after a couple of days it turns over but does not start , when I re start straight after it immidiatly picks up.

But then it runs very uneven untill engine is warm . ( meaning if I hit the throttle it will try to die like a car on carburator getting to much fuel or to less air.) But I am running close loop, so ?

changed the plugs to iridiums what improved the situation
got a groupA coil
motorsport leads
tried the ICV but that still works

not sure what do to , as soon as engine is warm it runs like a dream.

Steven

martysmartie

iTrader: (1)

I would first check the CTS, these can go wildly out of range. An easy way of telling is to measure the resistance, the resistance decreases as the temperature increases, if you have a very high resistance then it's faulty!

Martin

cozmeister

iTrader: (1)

And for that, you need a scale/reference, and a thermometer to determine what the coolant temp actually is


Temp 'C Resistance
-40 - 100950
-30 - 53100
-20 - 29120
-10 - 16600
0 - 9750
10 - 5970
20 - 3750
25 - 3000
30 - 2420
40 - 1596
50 - 1080
60 - 746
70 - 526
80 - 377
90 - 275
100 - 204
110 - 153
125 - 102

wolf cosworth

Morning,

measured the temp sensor all ok :-(

Not sure what to do next.

Wondering if it has anything to do with the fuel , there When I cold start it turns over but doesn't start , second time I start it goes straight on .

Do you need to have some fuel pressure left over after a week of standing still ( only driving in the weekend the cosworth ? )

Steven

Steven

martysmartie

iTrader: (1)

Thats the very reason the pump primes when the ignition is switched on, you could always check the fuel filter, incidentally when was it last changed? But then you would be experiencing problems all the time I should think.

Martin

wolf cosworth

Put already a new filter in and the pump is re wired .

Steven