M45 problems

Forum for Infiniti M35 and M45, and Nissan Fuga owners.
Tyrick22
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Car: 2006 Infiniti M45

M45 problems

Postby Tyrick22 » Tue Nov 03, 2020 12:54 pm

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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Re: M45 problems

Postby PapaSmurf2k3 » Tue Nov 03, 2020 11:16 pm

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

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

Re: M45 problems

Postby Tyrick22 » Wed Nov 04, 2020 3:47 am

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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Re: M45 problems

Postby Ilya » Wed Nov 04, 2020 6:38 am

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
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Re: M45 problems

Postby LIBRILZ » Thu Nov 05, 2020 12:07 am

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

EniGmA1987
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Re: M45 problems

Postby EniGmA1987 » Fri Nov 06, 2020 9:08 am

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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Re: M45 problems

Postby EdBwoy » Fri Nov 06, 2020 1:38 pm

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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