1998 QX4 Fuel Problem

A forum for the legendary Nissan Pathfinder and Infiniti QX4.
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stepfast
Posts: 1
Joined: Thu Mar 01, 2018 8:45 am
Car: 1998 Infiniti QX4

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Hi, Looking for advice on how to take on a fuel injection problem. 98QX4 was running fine suddenly acted like running out of gas with 1/2 tank. changed fuel pump, fuel filter. Correct pressure at fuel rail injectors not working at all. Not sure what to do next. I did notice that the mass air flow connection was loose cleaned and re-attached no difference.

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Q451990
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Posts: 11030
Joined: Tue Jul 23, 2002 8:21 am
Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
Location: Columbia, SC
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stepfast wrote: ↑
Thu Mar 01, 2018 9:17 am
 Correct pressure at fuel rail injectors not working at all.
:welcome: to NICO!

What is the fuel pressure reading?
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04pathse
Posts: 777
Joined: Sun May 02, 2010 2:55 pm
Car: 2004 Nissan Pathfinder SE
2008.5 Mazda Mazdaspeed 3

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I believe a faulty crank position sensor can keep the fuel injectors from firing, but you usually get a CEL light and code for that. Is your check engine light on?
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