Car struggles to turn over

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
zitupbaby
Posts: 45
Joined: Tue Mar 27, 2007 11:05 am
Car: 1993 nissan 300 zx, 91 nissan nx2000

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Hey guys...I am back!

This must be the spring of $1,000 to $3,000 LOL

OK, here is the deal:

Car does nto want to turn over ahve crank the hell out of it and give it gas then rev it to at least 4000 or 5000 rpm to get it to stay started. Then play with the gas a little and she is ok. I have to give her gas when I first move or she will die right off the bat, if that happens something strange occurs. I try to turn the car voer again and it just acts like the starter is nto making contact with the fly wheel or (the flywheel is missing teeth) you know the high pitched noise the starter makes.

Everytime I try to start the car and I am unable to because I didn't crank it long enough, it flouds, and have to wait. Also the whole starter scream usually happens too.

Thanks for the info guys!
Let me know if you need anymore info from me.


robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

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Check the ecu for codes, have you done any work on the car? This just started happening?

Check that the CAS is about centered in the adjustment slots, as we cannot check timing without engine running properly.

zitupbaby
Posts: 45
Joined: Tue Mar 27, 2007 11:05 am
Car: 1993 nissan 300 zx, 91 nissan nx2000

Post

could this all be due to a faulty MAF sensor?

robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

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Unplug it and see what happens, the car will run on a "safe" tune. (Unless the z32 ecu needs maf to run, please correct me if I'm wrong)

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Ace2cool
Posts: 11650
Joined: Sun Apr 20, 2008 5:21 pm
Car: 1991 Nissan 300ZX TT
1966 Datsun Fairlady 1600
2005 Suzuki GSX-R 600
1974 Honda CB550 Four
2009 Ford F150 Lariat
Location: Murfreesboro, TN

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It will run, but bog hardcore when power is applied. I accidentally left the MAF unplugged on the TT after a filter cleaning once.

zitupbaby
Posts: 45
Joined: Tue Mar 27, 2007 11:05 am
Car: 1993 nissan 300 zx, 91 nissan nx2000

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it wont even turn over when I unplug the MAF I have one on order

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Ace2cool
Posts: 11650
Joined: Sun Apr 20, 2008 5:21 pm
Car: 1991 Nissan 300ZX TT
1966 Datsun Fairlady 1600
2005 Suzuki GSX-R 600
1974 Honda CB550 Four
2009 Ford F150 Lariat
Location: Murfreesboro, TN

Post

If it's not turning over, there's a different problem, not related to the MAF at all. I would look to the starter or battery.

If it is cranking and not firing, the there is another electrical problem with the ignition circuit, as the MAF being unplugged will not cause the car to not fire, and the ECU will run off a "safe tune", based on throttle input from the TPS, O2 sensor readings, and RPM.

zitupbaby
Posts: 45
Joined: Tue Mar 27, 2007 11:05 am
Car: 1993 nissan 300 zx, 91 nissan nx2000

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when the maf is unplugged the car will not run at all fyi

robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

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It should... I tested mine the other day. It will stall, but if you restart the engine it will fire back to life.

Have you solved the problem?

zitupbaby
Posts: 45
Joined: Tue Mar 27, 2007 11:05 am
Car: 1993 nissan 300 zx, 91 nissan nx2000

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the problem is unsolved....and it sucks.

robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

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Have you checked the ecu for codes? Check the temp sensor connector for corrosion, might as well check them all

zitupbaby
Posts: 45
Joined: Tue Mar 27, 2007 11:05 am
Car: 1993 nissan 300 zx, 91 nissan nx2000

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car was flooded big time no clue why, I cleaned the IAAC today put it back on cleaned the conetors as best as I could an now the car won't start, it cranks but won't fire. I got her goingand started playing around with the idle screw she was running rough and noticed that one of the elec connections was loose on spark plug push it in tighter, left her running, went inside to wash up came out and she was dead. Nw she wont fire at all, what the heck is going on now?

robomatic12
Posts: 672
Joined: Sun Jul 12, 2009 12:05 pm
Car: 1990 300ZX TT

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Perhaps you have a fuel leak, one of the injectors may be leaking out fuel. Pull the spark plugs to see if all or just one in particular is soaked in fuel.

zitupbaby
Posts: 45
Joined: Tue Mar 27, 2007 11:05 am
Car: 1993 nissan 300 zx, 91 nissan nx2000

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no fuel leak coolant temp sensor is bad.

Zz300xX
Posts: 2
Joined: Wed Oct 24, 2012 6:02 pm
Car: 1990 300zx (2+2) N/A

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zitupbaby your last post was "no fuel leak coolant temp sensor is bad." does that mean that youve fixed your problem and it was just the coolant temp sensor? because i seem to have a similiar problem to yours thanks in advance.


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