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Old 03-12-2010, 11:00 PM   #1
leeswrx
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Default Possible rewiring needed on an SR20det

I will try to keep this short. My brother bought a 90' 240sx and had someone install an sr20det in N.C.(Crappy Job). He is now moved out here to Alamogordo N.M. The car was running fine except for a slight overheating issue. We replaced the thermostat and all was well. A few days later, his car would die when he would come to a stop(every other time). So we changed out the spark plugs and went to start up the car (couple of times), and it seemed like the starter wasn't hooked up. Then on the third try it started right up. Drove it around every thing seemed fine. The next day, went to start it up and the same problem came back(not starting). Had a friend come over and he got the car started by jumping the starter. Turned the car off, tried the regular way and same problem. The next day tried to start it by the starter and the engine only turned over. We pulled a spark plug only to find there was no spark. Could this be the iginition going bad? I almost forgot, when he turns on his headlights the fans shut off. If someone could recommend a decent place I would greatly appreciate it. I dontmind towing the car to PHX or ALB. N.M. if I have to. Also any ideas on what it might be.
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Last edited by leeswrx; 03-12-2010 at 11:37 PM.
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Old 03-14-2010, 03:43 AM   #2
bobturismo
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Quote:
Could this be the iginition going bad? I almost forgot, when he turns on his headlights the fans shut off
I'm sorry but that's funny.

Someone may have tapped into the headlight wiring for the fans maybe? Aftermarket fans?

does the starter turn over slow? =starter going out.

sounds like you have multiple problems.

First off take the car to autozone or checker and have them test the battery and or charging, they'll have a machine that they wheel out into the parking lot.

CLean out the battery connections and make sure the cables aren't stiff, they should be flexible. Look for corrosion on the tips of the cables, if you see white or green stuff between the strands then it's probably corroded.

If you have a digitial voltmeter (really its called a digital multi meter) you can test the resistance of the cable by putting one probe at the positive of the battery terminal and the other probe where the positive cable attaches the starter and putting the meter on the "Omega" symbol, looks like a horseshoe. 4-8 ohms is acceptible, if it reads 10+ohms, consider replaciong the cable.

Multi meters are $3 at harbor freight.

If neither is an option, just run another positive cable to test before actually installing it.

If your buddy jumped the starter with a screwdriver or some short piece of metal, the starter's solenoid is going bad. You can just replace the solenoid, but finding JUST the solenoid may be a problem, so a new starter is probably in order.
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Old 03-15-2010, 02:01 PM   #3
azboy
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their is a single black wire that goes to the starter (ground wire). it's just a spade connector and slips off all the damn time, check that.

No spark to individual coilpack ~ broken wire from the ignitor or bad coilpack
No spark to all coilpacks but fuel pump turns on ~ ignitor itself is bad -- my car sat for a few weeks and all the sudden the ignitor went bad, so it's very common for SRs to do this.

ditch the electric fans and get the stock clutch fan with shroud. it's been proven to cool better than electric fans anyway. especially when yours is not wired correctly in the first place.
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Old 03-15-2010, 03:14 PM   #4
ASU
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If the car is that messed up, your best bet would have a professional rewire the whole car. Just my 2 cents.
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Old 03-15-2010, 06:11 PM   #5
leeswrx
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Originally Posted by ASU View Post
If the car is that messed up, your best bet would have a professional rewire the whole car. Just my 2 cents.
I agree, I will check the ground off the starter and the coil packs to make sure see if I can figure it out. I appreciate everyones help. If you know of a reputable mechanic, I would be more than happy to give him some work.
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Old 03-15-2010, 06:29 PM   #6
azboy
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my buddy george does wiring for 240s w/ SR, RB, LSx, etc swaps but he lives in Flagstaff, AZ. it's one hell of a drive from where you are. he does this on his spare time out of his garage, so it's not a business/shop but the only guy i'd trust for any 240sx wiring jobs.

PM me if you want his contact info.

Or you can search around az240sx.org/forums for vendors.
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