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97 Infiniti Q45 cranking but not starting
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Babyjay951
New User
Oct 23, 2012, 10:02 PM
Post #1 of 6
(5776 views)
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97 Infiniti Q45 cranking but not starting
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I have a 1997 Infiniti q45 and the other day when I put into reverse, I backed up and it died on me, then would not fire back up. I have changed the fuel filter, changed out my spark plugs and made sure they all have spark and weren't drowned in oil. I unplugged and unmounted all the sensors near the mass air flow sensor and cleaned them all out with sensor cleaner and cleaned all the plugs with electric cleaner. When I turn the key, the car cranks ad turns over and it feels like its going to start but then dies out. Battery's only a couple months old, and I've never had any problem with the car since I got it besides tires and suspension. I've checked the fuel lines and there is pressure, return and intake lines. There is spark on all plugs and my scanner didn't read any errors so I can't tell if its a sensor or not, but I really don't want to bring to the shop an get my pockets raped if its something I can fix. It seems like it wants to start but when it goes to fire either a sensor or something electrical is telling the car not to. I'm looking for suggestions on what to check/do next. Any advice is appreciated and i can give as much details as I can. Thanks
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 23, 2012, 11:22 PM
Post #2 of 6
(5750 views)
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Re: 97 Infiniti Q45 cranking but not starting
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Will it fire up with a prime? What was the fuel pressure?
t
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Discretesignals
Ultimate Carjunky
/ Moderator
Oct 24, 2012, 4:47 AM
Post #3 of 6
(5730 views)
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Re: 97 Infiniti Q45 cranking but not starting
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I really don't want to bring to the shop an get my pockets raped if its something I can fix.
Why do you have that conception? There happens to be honest repair shops in business that aren't out to screw their customers. You can pay them to diagnose the problem. They will give you a quote and you can decide if you want do it or not. You probably don't have the equipment or knowledge to diagnose the problem anyhow.
Do you have a high end scan tool, volt meter, wiring schematic, no start trouble chart, fuel pressure gauge with adapters, spark tester, graphing multimeter/lab scope? Those are things needed to troubleshoot the problem your having. Sure you can go ahead and start guessing and slapping a bunch of parts on it hoping you fix the problem. How much will that cost you compared to having a diagnosis done which will pinpoint the component that failed.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Oct 24, 2012, 4:53 AM)
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nickwarner
Veteran
/ Moderator
Oct 24, 2012, 5:22 PM
Post #4 of 6
(5707 views)
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Re: 97 Infiniti Q45 cranking but not starting
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You do realize that the very people you are asking for help are the very same people you accuse of trying to screw you over, right? We are all pros here. That specialty tool list DS gave you is a bargain if we could even lay our hands on it for $10,000 too, by the way. thats over and above the other $50,000-100,000 in hand and power tools to get it apart the right right way and put it back together with a guarantee. But since we're all a bunch of cons anyway, I'll feel free to opt out of helping you for free to fix your LUXURY BRAND CAR that you're too cheap to pay a reasonable fee for. So how about this, crawl up your own ass and take a deep breath. You just bit that hand that feeds when you ask us to help you in the same breath you accuse of of thievery. Enjoy your pockets getting raped. Bend over good and hard and just imagine you took a field trip to Penn State that went horribly wrong in the showers.
There are a lot of honest techs out there. I hope you meet the ones that actually do max out your credit cards without fixing jack Sh!t.
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BrentNelson
Novice
Oct 25, 2012, 5:23 AM
Post #5 of 6
(5697 views)
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Re: 97 Infiniti Q45 cranking but not starting
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For starters you might want to check the fuel pump, fuel filter. Also check for a clogged catalytic converter.Try the mass airflow sensor, too.
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