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Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series. |
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#1 |
Zilvia Member
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Motor died while driving
I was driving my car a while back and in the middle of me driving the motor just died, all electrical was still working. I tried to start it back up and it wouldnt turn over so I started to looking around for the problem, saw i was getting no fuel pressure and long story short I hardwired it to the battery with a relay. After that the car seemed to start up fine all I did for a week was start it up and let it idle in the driveway to make sure it kept starting. After a week of good starts I decided to drive it today and not even 5minutes into driving after letting the motor warm up it died again. I normally waited 5 minutes and it would start up again but not today, today after it died it didnt want to start at all. Once towing it back to my driveway I thought I would give it another try and now it doesnt even want to try and turn over. Only things that happens when I turn the key is all the electrical components come on (gauges, radio, windows go up/down, can hear the fuel pump, etc.) I was thinking it was the starter but have no idea how to check it and wanted to get some input before i went and bought a part.
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#2 |
Zilvia FREAK!
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take the starter off and take it to any auto parts store and have it tested. Also make sure the battery is still good and make sure your alternator is also good and is your fuel pump even turning on? make sure your pump still working. Check all grounds and make sure they are tight and make sure the power cable is also tight. i can go on and on and on but yeah just do the first 3 things i said.
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#5 |
Zilvia Member
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which ones?
EDIT: Ya I checked all the fuses all of them are fine. Just need to make time to go and take the starter out. Last edited by Chrisq0904; 10-24-2010 at 05:03 PM.. |
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#6 |
Zilvia Member
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Well lets take this one problem at a time and just begin with your no crank problem. It is a no crank right? Anyways, to test your starter control circuit just put a voltmeter on the small stud of the starter solenoid and have someone turn the key to crank. If you read 12 volts your starter control circuit is good. Now do a voltage drop across the positive batt terminal to the starter positive terminal. Anymore than .5 volts is too much. Do that and get back with your results.
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#9 |
Zilvia Member
![]() Join Date: Jul 2009
Location: Pittsburgh, PA
Age: 33
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i had the same problem a few years ago. same thing driving my car 1 night and out of nowhere the car dies. for me i put it in neutral and fired it up again but only lasted about 5 mins. all the electric stuff work. got it towed home. list in order of what i did to the end.
1.battery (wasnt the problem) 2. starter (wasnt the problem) discovered that the fuel pump was dying. replaced it and never had a problem with it again after that. if you replace the pump make sure you replace the fuel filter and put fuel cleaner after you install everything just in case. but to me thats what it sounds like. good luck to you. let me know |
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#10 | |
Zilvia Member
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Quote:
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#12 |
Zilvia Member
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on top of that, i hate to ask but how long ago did you put the pump in? because if you installed it the same time this happened, chances are you have the wiring backwards (even when you hardwired it) or you have the pump backwards. i'm not saying that it is those but i just did that 2 weeks ago on a universal pump. just make sure is all
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#14 |
Zilvia Member
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Rabboni: No voltage drop on the starter and starter tested ok
By starter control circuit do you mean the stud for the power? If so that has 12V Chaw wee: No I never replaced the fuel filter and no I am not getting spark. |
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#15 | |
Zilvia Member
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Quote:
Also you said the starter wont even engage anymore, but has 12v? Have you tried to "jump start" the starter but directly applying 12v to it to get it started? If so did it work? Might as well replace the fuel filter and while your at it just get the 96 300zx n/a filter, direct swap with bigger flow and filteration. Last edited by klits562; 10-26-2010 at 05:52 PM.. Reason: lol 100th post |
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#16 |
Zilvia Junkie
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Double check your fuses because it sounds exactly like a hairline crack in a fuse. I've ran into this myself and a friend had it just like u where it would work for so long then stop, and after a little while it would work again. On those square tall fuses take the plastic cover off the top to inspect(thats how i missed mine). Also if u have a multimeter check key fuses for resistance, it should read ol(open lead) or 0 ohms, otherwise the fuse is bad.
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#17 |
Zilvia Junkie
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i had sort of a similar problem looong time ago. car just died one time on the highway, started up a couple days later drove it and left me stranded again..and after much trying to figure out wtf was the problem, turns out my harness under my driver side front fender was shaved off and cut from the tire scraping alot. . just some input u could check out.
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#19 |
Post Whore!
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^Second that, if your car is low and your harness isn't tucked correctly, it will screw everything up.
Also make sure your coil wire is plugged in all the way. Mine fell out a few times in the past. Try push starting the car? |
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#20 |
Zilvia Member
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Checked my harness in the fender and it doesnt even looked touched...Double no triple checked all my fuses with a meter they are check ok....I tried jump starting the starter but not sure if i did it right, what i did was just take a clip and connect the + post on starter to + post on batter when i was turning the ignition.... if thats the correct way then no that didnt work either.
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#21 |
Zilvia Member
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OK i tried to push start the car and it turn on and i drove it a few feet and stayed on, didnt want to drive too far...but i still cant get it to turn on when i turn the key...
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#22 |
Zilvia Junkie
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Hmm, sounds more like its the starter or solenoid. Have someone turn the key and hold it for a several seconds in the start position while u hold the positive lead of ur multimeter on the signal wire post(the skinny wire) and the negative on the neg batt terminal. U should get a 12v signal, if u do then its the solenoid or starter, EDIT: but first check resistance between the starter body and the neg batt terminal, shouldn't be more than a few ohms. If not u have a bad ground.
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#23 | |
Zilvia Member
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