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No start. Originally thought it was the distributor--replaced--no start.
Then Crank sensor replaced no start.
Contacted a Nissanmechanic said it was either the crank sensor or ECM.
Since I already replaced the sensor--the verdict was the ECM is bad. Got a new ECM and guess what it started! Bad news: It only started once. Can not get it to start again.
So obviously it has something to do the ECM, but not sure what?
The distributor and crank sensor have been replaced and the car started once with a used ECM and then will not start again.
What would be short circuiting the ECM?
It cranks over fine, and air, fuel and compression are good. It has no spark--plugs and wires are good and so is the distributor, coils and crank sensor. It is a problem with the ECM. I put a used one in and it started right up, but only one time. No spark coming out of coil wire (Coil wire already replaced).
Power coming into the coil, but no power coming out of the coil. 2 Prong plug has juice in both prongs, but we can't get any spark out of coil wire. It's not the coil causing the problem.
I took the distributor out and plugged it in, turned on the key(not the start position), and turned the shaft of the distributor and the coil wire has spark and the tach even moves. When I bolt up the distributor to the engine, the coil wire loses spark. No one seems to know what the hell is going on with this car...
I'm not that familiar with this particular car - it has both a crank sensor and a distributor? Are you certain the distributor is turning when you crank the engine?
Is the coil mounted on the distributor?
Does this car have a belt driven cam/timing system?
Have you read the codes? You almost certainly have a CEL set.
John, maybe it's best to start at the beginning - apparently you drove the car, parked it, running fine, and then the next time you tried to start it, it wouldn't start. At that point you replaced the distributor (with new, used, rebuilt?) (you sure you got all the wires back on in correct firing order?) and that didn't help. So you changed the ECU, and got one start out of that, now it won't start again, right?
But, if you take the distributor out of the engine and turn it, you get a spark at least at the coil, and the tach moves.
But is doesn't make any sense because the car did start after the ECU was replaced and it ran fine. It was only after we put it back together we had the same problem.
A friend of mine spoke to a Nissan tech he knows and was told that the distributor may be the whole problem. The fact that it loses spark just by bolting it in makes him think the shaft is somehow grounding out the cam position sensor inside the distributor. He said the only distributor to put in is a new Nissan distributor which costs approximately $400. He told him used and rebuilts are junk.
A friend of mine spoke to a Nissan tech he knows and was told that the distributor may be the whole problem. The fact that it loses spark just by bolting it in makes him think the shaft is somehow grounding out the cam position sensor inside the distributor. He said the only distributor to put in is a new Nissan distributor which costs approximately $400. He told him used and rebuilts are junk.
Never did any work on Nissan's but the Nissan tech may be on to something. I know for a fact that certain Jeep models "DO NOT" like aftermarket cam position sensors. I ran into that problem a few years back when I replaced a CPS on a 01 Grand Cherokee. Went back to NAPA twice to exchange it and it still wouldn't run. Got one from Jeep and the car ran fine. Just curious, is the ECM brand new from Nissan or is it a new rebuilt. If so, was the ECM flashed before you installed it?
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