Help Wanted - Fiesta RS Turbo - No ignition

Firstly, is there an immobilizer?!

Does the fuel pump run breifly when the key is turned on. If not, the main ECU isnt powered up and you're gunna get bugger all til you sort that- check the ECU fuse in the fuse box and try another main relay.

If ECU is powered then look for the tacho needle jumping alittle during cranking. If yes, then coil pack has failed, if no:-

Primary igntion signal comes from the crank sensor just above the starter motor. Failure is common, so is corrosion in the connector. The superseeded versions have gold pins, and with the connector you cut off the old plug and

*solder & heatshrink* the new one in place. Do NOT use a gold pinned sensor with a tinned copper connector.

Check for a resistance of around 100ohms across the sensor or at least 3-4 volts during cranking. If you get both of these, then its not the CAS. From here the signal passes to the EDIS module bolted to the inner wing. If this fails the car will still run, but timing will be fixed.

You can also check the 3 pin connecor on the coil pack and the earth point nearby for corrosion and good contact. pins 1 and 3 supply power to each half of the coil pack switched from the EDIS module and pin 2 is earth and tacho signal.

If checks on the ECU and CAS check out, come back and we'll go onto checking the bits in between.

hope this helps.

Tim..

In message , Tim.. writes

Many thanks for the above Tim, I shall check it in the morning as I am just about to go on nightshift.

In message , Tim.. writes

Still no joy! Can you please advise further?

Yes

Yes

No

Checked for resistance and couldn't detect one nor a voltage. Subsequently replaced both the crank sensor and the wiring up to the EDIS on the bulkhead.

Checked the voltages on the coil. Haynes manual describes as 12V feed to pin 2 which is there. Checked also the resistance across both pin 1 and

2, then across pin 2 and 3 on the coil. These were within spec. From here I checked to see if the resistance on the coil between ht terminals 1 and 4, then 2 and 3 where within tolerances. Then checked between 1 and 2, 3 and 4 for infinite resistance which was correct. All this checks out. >

Sorry, i was transposed with the previous post re coilpack pins- too much falling over water!! Pin 2 power, Pins 1 and 3 switch to earth for each coil.

Get your dwell meter out onto pins 1 or 3 and look for a realistic cranking rpm when you turn it over- remember it will be half what you would expect to see on a 4 cylinder engine.

If the EDIS isnt switching the coil, then are you sure you have a crank pulse getting to it from the CAS and is it receiving power and earth on the relevant pins of its multiplug??

Tim..