timing lamp on ECU car - wire connection to earth ?

Question

Hi,Excuse me for checking this beforehand on the forum.When checking timing marks with a lamp, one said to me there should be awire from the harness connected to earth/ground to ensure a fixed advance,which can then be adjusted. This distributor is still manually adjustable.Can I believe this ? This connector is rather special, having a very thinmetal pin and a plastic pin protruding next to it. So I guess this connectoris meant for some factory- specific tester.But I can believe this to be a common feature on some ECU cars.Anyone has experience with this ?Thanks in advance,Carl

carl · Accepted Answer

Sorry,Forgot to say crankshaft and camshaft angle/position sensor are incorporatedin distributor. So injection timing is changed with this distributor settingas well. I think more reason to check it fysically ...Thanks,Carl

Mike Romain · Answer

You really should say what kind of car and engine and age. There are tons of 'new' ways to time a vehicle these days including a lot that cannot be adjusted.

Some of those 'unused' grounds are just for high altitude running.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

carl wrote:

carl · Answer

Hi Mike&all,and sorry. It is a Mitsubishi Space Star 1.3 '99. Meanwhile I receivedconfirmationfrom an ex-mechanic salesman. This brown/black wire is meant indeed to fixadvance ignition to a valueused for adjustment. Just is tricky that the connector looked too special tobe used just for grounding.FYI there is on this car also a blue fuel pump engine override connector foremptying the tank.Carl..."Mike Romain"  schreef in berichtnews:

timing lamp on ECU car - wire connection to earth ?

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