hi,

what could be causing a ZVH to start like a bag of sh!t in the mornings...

it idles about 400 rpm for about 10 minutes, then after gentle revving and warming up the revs get higher to about normal of 1000-1100rrpm...

is it misfiring ? or running on 2 or 3 cylinders

why is this happening everytime ? its only after its cooled right down, like overnight etc....

can some help! thanks!

 

what injection system u running mfi/efi?, i would try the cold start valve mate

 

it is running Efi ...

where would the cold start valve be located, as i know where it is on MFi....

what should i do replace it, you mean ?

 

My old S1 was the same, wouldn't hold it's own when cold and would miss, I found that if you started it without touching the gas pedal it would start better, but as said, cold start valve, replace it

 

the sensor is on the bottom of the inlet manifold, blue plug i think. when its hot & you disconnect the iscv, do the revs drop to about 700rpm? (the base idle setting), also make sure the throttle body is clean,

 

what sensor ?

been told EFI does not have cold start valve...


ISCV is what could be doing it, or throttle body...

 

Thermotime switch. As above said blue in colour, under the inlet manifold. And your correct efi doesnt have a seperate cold start valve like the mfi. Its all ecu controlled.

 

what about it ? clean it or replace it completely ?

 

i would personally just replace it, but it can be tested, ill presume your using fiesta turbo management, at 0 degrees C, it should read 88000-102000 ohms, at 80 deg C, 3000-4500 ohms, this is measured with plug disconnected across the 2 pins, with the plug connected, ignition on & at 0 deg C, you should measure 3.8 volts approx, & at 80 deg C, 0.7 approx these readings are off autodata so sorry if there wrong

 

what is the exact component name for when i order one tomorrow at my local FORDs

its name is thermotime switch ?! part number ?

cheers mate

 

and that will cure it completely ?

 

E.C.T, engine coolant temp sensor (not sender), i cant say whether it will fix it, but its the first thing i would try, did you try disconnecting the iscv when hot to see if the revs drop? (just to check its working really)

 

what does the ECT do exactly ?

when hot and cold

 

Tells the ecu the engine coolant temp throughout warmup procedure to provide correct fuelling.Very basic explanation mind