Hi, can anyone out there help me to diagnose the above problem. Where exactly is the crankshaft position sensor located on this model and could a faulty one effect the timing. There is also a vacuum pipe running from the ignition control module in under the inlet manifold, where is this connected to?. There seems to be a removable section on the module where this connects, is it wise to remove this for examination?. I dont have a CAT fitted so would correct to say there isnt a lambda sensor fitted, I have looked on the exhaust manifolds and down pipes with no sign of any sensors.
Any suggestions would be helpful
Rgds
Mike

On the rear on the engine, drivers side(USA).

Timing can't be changed, pre-set program in the ignition module (EZL)

Incorrect installation of the ring gear will result in the timing being 35deg advanced OR retarded!

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Thanks for the reply MB Doc, I have traced a cable from the module to the rear of the engine before, but very difficult to see where it connects to the sensor. I presume its mounted on the bell housing, ie where the engine bolts to the gear box. I tested the ignition timing with a stobe light when warm at idle 650rpm and it read 20deg btdc., I think it should be 7-11 deg. This is resulting in backfires at start up and a hesitant acceleration. Have replaced fuel pumps, filter, distributer cap, leads and plugs. have also checked fuel pressures at cold, hot, driving and stationary.So it seems I am back to ignition problems.
I might just add that this problem occured overnite, so its leading me to believe that its some electronic wizadry has had it.
Thanks again for the help.
Any tests I can Do?
Mike

Anyone know what the resitance reading on the crankshaft position sensor and the ignition coil should be?
Thanks
Mike

If the car is running the sensor is being recognized. Timing is not an issue of sensor performance. It is possible for intermittant misfires or worse to occur as a result of poor sensor signals or signal strength; not timing issues though.

You should have vacuum at the line to the ignition control unit. The ign controller also is dependant on engine temp. The reading comes from the two wire temp sensor. One wire is used for ignition and the other for KE.

There is a removalble plug to the ignition unit that is a coding plug for timing control. I have no info for how it varies timing.

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Thanks for that Steve, I shall leave the crank sensor alone and see if there is vacuum present when running (if I can get it started)at the EZL unit. Any quick test to check the temp sensor?
I can see there are different positions on the plugs to the EZL unit but I presume these are for adjusting timing for differences in altitude or gas grades. I have not touched these as the problem occured overnite, no previous mechanical or electrical work was carried out prior to this.
Mike

All the plug is is a resistor - it would be fairly interesting (but potentially hazardous to the rather expensive unit) to see what putting a variable resistor in its place would do with the timing. With no schematics to the unit itself, it's hard to say if its a digital, analog, or hybrid kind of device.

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