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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


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Old 05-23-2005, 01:37 AM   #1
dwillms
 
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No spark/No start, 95 SE

Hello,

I just picked up a 95 240SX SE as a project car, and I'm having trouble getting the car started. It has the factory KA24DE and a 5-spd, looks as close to stock as any car I can think of. I will try to explain in as much detail as I can.

First, the car had a super-cheap alarm/remote start install that I removed. Literally wires wrapped together and taped . Secondly, I got no keys with the car, so I have removed the tumbler from the cylinder, and have jumped the two-pin connector together from the cylinder to make the car think they key is there, while turning the car over with a flat screwdriver.

Third, even after removing all alarm/remote start stuff, I can still turn the car over with the clutch not pushed in.

Now, for what I've done so far:

-Have fuel, don't have spark
-Checked ECM, no trouble codes in diagnostic mode
-Checked compression, low all around (85-95-115-115), obviously checked cold (but wide variance)
-Seem to have power to distributor, but now that I have a proper wiring diagram, I will check exactly tomorrow
-Plugs and wires are ok, cleaned deposits off of cap/rotor
-All fuses were checked and are fine, both under dash and under hood

The car will crank and turn over pretty slowly, but won't start. I'm pretty sure the starter is getting close to fried, from other people trying to start the car constantly when it wouldn't start (it was a salvage car).

Since I've had a car before with cheap alarm install problems, my first thoughts were that after ripping it out, it would solve the no start issues but didn't. I cut all the wires and wrapped the bare wires that were spliced into, I think I will double check tomorrow to ensure there are no problems there. It doesn't make sense for it to crank and have fuel, but no spark though.

After doing some searching from others, it seems most likely problems left, in order are: coil, distributor, ECM? I'm having trouble coming up with any other ideas, and I also don't have the resources to throw money at new parts trying to replace everything in getting it to run.

Since I'm new to Nissan's, and don't have any manuals to go off of, could anybody point me towards the proper wiring for ignition components, and the correct procedure to check that everything works properly?

Thanks,
-Dustin

Last edited by dwillms; 05-23-2005 at 01:55 AM..
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Old 05-23-2005, 09:52 AM   #2
dwillms
 
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bump.

I'm downloading the FSM, but right now I'm on 56K and it takes forever. Can anybody even show me the proper wiring diagrams, and a procedure to check if I'm getting power to my coilpack? Sorry if I sound like an idiot, but I'm new to this Nissan thing, but I'm trying to learn it all on the fly!

-Dustin
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Old 05-23-2005, 04:16 PM   #3
dwillms
 
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Took a closer look today, and saw that I actually have two wires cut out of my 6-pin harness going to the distributor. All I could find in the FSM is that this harness is the "Cam Position Sensor and Power Transistor" connector.

If ANYBODY can help me by telling me what those 6 wires are and where they go, I would really appreciate it. In the diagram from FSM, they terminal's are labeled "GHIJKL" from left-right, the two terminals that were cut are terminal's 'G' and 'H'.

Thanks again,
-Dustin
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