VehicleFitment/Renault

Ignition

Early 16v Renaults have a cam mounted distributor, driven by a single coil. The coil has an integrated ignition amplifier with three pin and two pin connectors wired:

Three Pin connector:

Two Pin connector:

When the ignition control is disconnected from the ignition module it reads +5v. When it is connected to the ignition module it reads 0v.

Scope traces show the ignition pattern on an idling car:

cliorunning.png

cliorunning3.png

Later Renaults have a 60-2 trigger pattern flywheel and use a Sagem wasted spark coil pack.

Triggering

Early EFi Renault engines came with an unusual trigger pattern on their flywheel. 20 teeth followed by one tooth twice the normal tooth width, followed by a missing tooth twice the normal tooth width.

This pattern occurs twice to indicate TDC & BDC.

A trigger log of the flywheel has been made:

http://www.vems.co.uk/VEMSTrigger/RenaultToothTimes.txt

Using the Examples from http://www.vems.hu/wiki/index.php?page=InputTrigger%2FTriggerLog

...		....
455		4416 # long
457		2929 # long
459		1835 
461		1838
463		1866
465		1834
467		1822
469		1822
471		1844
473		1815
475		1803
477		1836
479		1799
481		1799
483		1801
485		1831
487		1802
489		1811
491		1847
493		1813
495		4480 # long
497		2873 # long
... one crank rotation later position 495-455 = 40
499		1837
501		1829
503		1840

Looks like a 22-2 teeth pattern (20 tooth: the 40 difference is normal, comes from the way the log is made), but inverted.

This works with standard config using a 20 tooth primary trigger setting. Cranking shows a good RPM signal, config info will be posted once the car is running correctly.