[NathRiley]

Hi guys

I have a Ford Fiesta 1.25 Zetec-s Lx 1997 and blew the con rod to bits. I have recently put a new engine out of a Ford Fiesta 1.25 Zetec-s Lx 2000 and hey presto it turns over .. oh wait it doesnt start? I checked all the wiring and connections and changed all the crankshaft/camsharft sensors, flywheel sensor, carb sensor, everything really and still so i chacked the spark plugs and to my bewilderment i have no spark from 1-4 .. i changed the coil packj and the leads and the plugs and still nothing. I then unplugged and pushed the connections together agaqin to see if i had a loose connection, but nothing still. i have done everything i can and it still wont start!

Please Help!!!!

Nath

[Techiloyd]

Ok....

Firstly need to check whether you have a crank sensor pulse going into the ECU (disconnect ECU plug, with Pin-Data find the wire for crank sensor input and check for a waveform)

If no pulse then poss loom fault (as you have tried a new sensor)

If yes then reconnect plug & find the output wire to the coil pack. If you have no pulse it will be the very common trigger unit failure within the ECU (can be repaired) if you do have pulse then check wire to coil.

[MrDanno]

Are you sure the immobiliser is working correctly. Occasionally they can lose the key code if left for a while with the battery disconnected.

Does the PATS light flash when the engine is cranking?

[Techiloyd]

Originally Posted by MrDanno

Are you sure the immobiliser is working correctly. Occasionally they can lose the key code if left for a while with the battery disconnected.

Does the PATS light flash when the engine is cranking?

This is a good point.



(do Fords not cut the starter solenoid through PATS?)

[Hometune]

I think the PATS only cuts the fuel pump on those older cars (?)
I agree that if just 1 and 4 have no spark, then check for a signal at the coil multiplug in case the ECU has failed.

However, the following may be the cause once all else is exhausted. Just pray it isn't.

This engine may not be compatible with the existing ECU. Can't remember if the crank sensor picks up from a reluctor ring on the crankshaft or from a reference point on the flywheel.
Either way, the positioning of the reference point may be different on the later engine. If I am right, then it means swapping the flywheel to the original and hoping the cam sensor and the ECU are compatible. If it is the reluctor ring, you will need to remove the crankshaft I think to change it as its at the flywheel end.
If the new engine was fitted to a car with 2 lambda sensors then I think there will be problems as your car only has one.

[Techiloyd]

Originally Posted by Hometune

I think the PATS only cuts the fuel pump on those older cars (?)
I agree that if just 1 and 4 have no spark, then check for a signal at the coil multiplug in case the ECU has failed.

However, the following may be the cause once all else is exhausted. Just pray it isn't.

This engine may not be compatible with the existing ECU. Can't remember if the crank sensor picks up from a reluctor ring on the crankshaft or from a reference point on the flywheel.
Either way, the positioning of the reference point may be different on the later engine. If I am right, then it means swapping the flywheel to the original and hoping the cam sensor and the ECU are compatible. If it is the reluctor ring, you will need to remove the crankshaft I think to change it as its at the flywheel end.
If the new engine was fitted to a car with 2 lambda sensors then I think there will be problems as your car only has one.

Again, some good points.


The car chassis being 1997 will deffinately be OBD phase 1 but a 2000 is borderline, especially if it was out of a W reg car

OBD 1 = 1 Lambda
OBD 2 = 2 Lambdas