2002 NISSAN MAXIMA MY CAR WON'T START

  • Tiny
  • evans jean
  • 2002 Nissan Maxima

Engine Performance problem
2002 Nissan Maxima 6 cyl Front Wheel Drive Automatic 69567 miles

Hi I have a 2002 nissan maxima my car won't start it crank but won't start because the injector have no pulse I got power from the injector but no pulse I change the ecm got it reprogram by nissan it start and shut right off then don't start again so I disconect the throttle wire and plug it back it start and shut off after about 15 second every where I go no one seem to find my problem help please. I even change the cam sensor both of them samething no start change fuel pump no start check all the fuse no start I don't know what to check for next because the was running find park it came back don't wonna start help please

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Saturday, April 11th, 2009 AT 1:34 AM

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  • Tiny
  • racefan966
  • Expert
  • 5,136 posts

I need to know if the car is getting spark when you crank it. Also I need to know if you have a digital multi meter and if you are willing to buy noid lights if needed to check the injector pulse. Get back to me and we will go from there.

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Saturday, April 11th, 2009 AT 9:37 AM
  • Tiny
  • evans jean
  • Member

Yes I got good spark also yes I have a DVOM no I dont have a noid light but the guy at the shop test it with a noid light and all them injector have no pulse can the injecter be shorted or something

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Saturday, April 11th, 2009 AT 12:30 PM
  • Tiny
  • racefan966
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Ok the injector pulse is controled by the ECM which uses the CMP and Mass air Flow unit to determine the pulse and pulse width. So the CMP sensor is what I would like to check first. I need you to check the resistance of the sensor. If is it a hitachi type then it should read 1440-1760 ohms. If it is a mitsubishi type then it should read 2090-2550 ohms. Let me know what you find and we will go from there.

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Monday, April 13th, 2009 AT 7:03 PM
  • Tiny
  • evans jean
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Hi first I would like to know whats a cmp sensor is or u mean cps camshaft position sensor, but today I took the crank sensor out and check the resistance it was reading 678 when resistance should be 0 or infiniti plus nissan have a recall on crank sensor

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Thursday, April 16th, 2009 AT 1:39 AM
  • Tiny
  • racefan966
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Yes that is what I was refering to Nissan was calling it CMP sorry for confusion. It should read O ohms anything else is no good (I'm not sure where the manual was coming up with two types as when I checked this morining it only gave one and also gave the proper info). That should be you problem and if it is a recall then it should be free from there dealer too. Let me know how it goes.

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Thursday, April 16th, 2009 AT 10:15 AM

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