M45 problems

Forum for Infiniti M35 and M45, and Nissan Fuga owners.
Tyrick22
Posts: 9
Joined: Sat Sep 22, 2018 2:26 pm
Car: 2006 Infiniti M45

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I installed a new engine in m45 and when i crank it it hesitate to start also the rpms is cutting out at 3000 rpms i dont know what could cause this


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PapaSmurf2k3
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Posts: 23998
Joined: Thu Nov 21, 2002 3:20 pm
Car: 2017 Corvette, 2018 Focus ST, 1993 240sx truck KA Turbo.
Location: Merrimack, NH

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Moved to the M45 forum.
Sounds like the vehicle is in limp mode. Have you tried scanning the ECU for error codes?

Tyrick22
Posts: 9
Joined: Sat Sep 22, 2018 2:26 pm
Car: 2006 Infiniti M45

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I haven't how do I do that and I scanned for codes with odd but it only ask me to replace a sensor which I did

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Ilya
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Joined: Fri Apr 23, 2010 11:20 pm
Car: 2011 M56x but I spend a lot of time on my 2015 Kawasaki Vulcan S. Former owner of a 2007 M35x. Also take care of my wife's 2016 QX60.
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Definitely limp mode. What did your ODB-II scan suggest? You need to be specific. We can't help you without those specifics. What codes did you get and what sensor did you replace?

LIBRILZ
Posts: 1483
Joined: Sun Mar 04, 2007 3:17 pm
Car: 1990 Nissan 300zx
2007 M45 Sport

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Sounds like limp mode, or something MAF related. Check all connectors and grounds

EniGmA1987
Posts: 2256
Joined: Tue Apr 28, 2009 5:13 am
Car: '06 Infiniti M35 Sport

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If it is a new installed engine and hesitating to start, it could be any number of things. The easiest things to check would be making sure the MAF sensor is installed in the correct direction and plugged in, as well as camshaft and crankshaft sensors installed correctly and plugged in. Coil packs installed and plugged in correctly would also be an easy check. It is easy to plug in cylinders 4 and 6 on the driver side coil packs since the plugs are backward and can both reach each other's coil packs. Old plastic on these connectors can often make fully plugging them in difficult, so make sure they have snapped in securely.

EdBwoy
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Location: Indiana, USA
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This discussion definitely needs more info.

What codes?
Which sensor was replaced?
Did you use an OEM sensor from Nissan/Infiniti?

It could be an issue with the crankshaft sensor, but we would need the OP to provide some clarity on the situation.


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