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Nissan 300ZX, all models

171 messages,  Last post on Sep 22, 2009 at 11:44 AM

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What is this discussion about? Nissan 300ZX, Hatchback

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#137 of 171 1986 300zx won't run please help by 300pilot Dec 11, 2008 (9:17 am)
I bought a 86 300zx non-turbo 5sp in GA, dealer said he sold it to a good customer who drove it to FL and it quit,towed back to dealer and I bought it. It starts for about 1sec. and quits. Valdosta nissan said that it had a 84 ecm harness and it wouldn't work but it's obvious that the car ran with this harness. I can hear the fuel pump when I turn the key. I've swapped out dist, crank sens, cyl temp sens. fuel pump, fuel pres sens, w/used units, all with the same result, starts and quits. and ecm's too. i've wrenched on motors for years, what am I missing? It's driving me nuts! It's a beautiful car and i've had these z's for years. Oh please help me z gurus. Replies to this message: Mr_Shiftright (Dec 11, 2008 10:04 am) madog3 (Dec 11, 2008 10:06 pm)
#138 of 171 Re: 1986 300zx won't run please help [300pilot] by Mr_Shiftright HOST Dec 11, 2008 (10:04 am)
Replying to: 300pilot (Dec 11, 2008 9:17 am) Well if indeed it has a cobbled up '84 harness in there, your problem could be anywhere in the harness. It sounds to me like some vital signal from a sensor to the ECM is getting lost or misinterpreted, doesn't it?   You may need a factory manual and a good diagnostic computer to figure this one out. Once modifications have been made, all bets are off. You may need to initiate the tedious process of checking voltages and signals at each ECM port.
#139 of 171 Odd thing you might look at - by lokki Dec 11, 2008 (12:56 pm)
I had this exact problem on an Acura Integra. It would crank and start and die.   Sometimes it would run but 98 percent of the time it just started and stopped.   It turned out that the ignition switch in the steering column had cracked. When you turned the key to start, it would make contact and turn the starter. The engine would start, and I'd let go of the key. However, because of the crack in the switch, the key didn't fall all the way back to the 'run' position, contact would be broken, and the engine would stop.   My dealer replaced about half of the fuel injection and ignition system before we figured it out.   Probably isn't your problem, but hey! It's worth a look along those lines.   Good luck.
#140 of 171 Re: 1986 300zx won't run please help [300pilot] by madog3 Dec 11, 2008 (10:06 pm)
Replying to: 300pilot (Dec 11, 2008 9:17 am) I tend to agree that if it ran B4, why not now? If the car just quit, as you were told and B4 you spend more money - get out your volt ohm meter and check out the fuse panel (driver's side kick panel) or (easier) - pull the panel loose and check the wire solder connertions on the rear. These joints have been known to break and the engine will start (sometimes) and then the viberation breaks the connection and the engine stops. Cross your fringers - give it a shot - good luck...
#141 of 171 thanks guys by 300pilot Dec 12, 2008 (11:08 pm)
I can't wait to get back to GR Michigan (I'm driving back from LA now) to try your suggestions, where can I get the manual the haynes ones don't have crap in them. I'll keep you posted. thanks 300pilot Replies to this message: madog3 (Dec 13, 2008 5:29 pm)
#142 of 171 Re: thanks guys [300pilot] by madog3 Dec 13, 2008 (5:29 pm)
Replying to: 300pilot (Dec 12, 2008 11:08 pm) Got mine direct from Nissan (USA). Got the phone number from the local dealer's parts department, called (they do plastic) and presto - two weeks and a brand new 300ZX shop manual. Beware the manual is very good but have errors in it. You're right, the Haynes are only good for the outhouse (down here) or to start you're winter fire up where you are.
#143 of 171 1985 300zx needinfo by tomcat8 Jan 14, 2009 (10:09 am)
I havea 1985 300zx. I SUSPECT MY CRANKSHAFT POS. SENSOR IS BAD. i cannot find it on car. I need a picture if you have one. Thanks. Replies to this message: Mr_Shiftright (Jan 14, 2009 10:13 am)
#144 of 171 Re: 1985 300zx needinfo [tomcat8] by Mr_Shiftright HOST Jan 14, 2009 (10:13 am)
Replying to: tomcat8 (Jan 14, 2009 10:09 am) Didn't we answer this already? It's in your distributor.
#145 of 171 Re: 1985 300ZX [jcliffro] by silkie307 Jan 27, 2009 (6:57 pm)
Replying to: jcliffro (Jul 19, 2002 2:14 pm) i have a 300ZX , 1988 and i do love it , it runs good , it not in as good shape as yours, i bought it used. now it's time for me to sell it , i hate to but its just time . but i need to get a passenger side T-Top for it . lightening must have hit it ,cause i went out one day and the glass was completely crystalize.   if any one could give me advice on how to sell it or where to find a black smoked glass T-Top , that would be great.   what about selling it for parts? cause no one will want to buy a car with only one t-top or 2 t-tops but in different colors and i heard they come in 10 or 12 different shades .
#146 of 171 300zx burst of hot air & cruise control proble by joelcurtis Jan 28, 2009 (11:59 am)
when i get on it i get hot air out of vents also 5 speed 1988 300zx cant set speed green light comes on dash little set buton when i push dont wor i replace relay whole switch now what? thanks

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