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2005 R51 Slow to start
Posted: Sun Feb 10, 2019 12:28 pm
by king_wrecks
Hey guys and gals, it’s been awhile since I’ve been around but I still have my Pathfinder and lately it’s been getting on my nerves.
I’ve owned my Pathfinder since 2011. Every time I turned the key, it starts RIGHT AWAY. No idle issues, ran perfectly with 16-19mpg depending on driving conditions. A few months ago I hopped in and bumped the key and it turned over but didn’t crank. I turned it back off and then held the key for about 5 seconds and it cranked but all the lights on my dash came on and went back off except the “SERVICE ENGINE SOON†and “VDC†lights. Since then, it takes a few seconds before it starts and while driving, it seems as though there’s a surge when coming to a stop. I haven’t driven out a full tank in awhile so I’m unsure of fuel mileage.
Anyone have any ideas?[/b]
Posted: Sun Feb 10, 2019 1:19 pm
by palmerwmd
Cam shaft position sensor is one possibility.
Have you checked for codes yet?

Re: 2005 R51 Slow to start
Posted: Sun Feb 10, 2019 1:27 pm
by eieio
king_wrecks wrote:Hey guys and gals, it’s been awhile since I’ve been around but I still have my Pathfinder and lately it’s been getting on my nerves.
I’ve owned my Pathfinder since 2011. Every time I turned the key, it starts RIGHT AWAY. No idle issues, ran perfectly with 16-19mpg depending on driving conditions. A few months ago I hopped in and bumped the key and it turned over but didn’t crank. I turned it back off and then held the key for about 5 seconds and it cranked but all the lights on my dash came on and went back off except the “SERVICE ENGINE SOON†and “VDC†lights. Since then, it takes a few seconds before it starts and while driving, it seems as though there’s a surge when coming to a stop. I haven’t driven out a full tank in awhile so I’m unsure of fuel mileage.
Anyone have any ideas?[/b]
does it re-start easily after a short drive?
it's probably battery/cable connection related, as the symptoms are just
that, especially when the weather turns cold.
how old is the battery?
are the cable clamps clean/tight?
frequently, the negative cable is loose on the post of the battery even though the nut is tight. try pivoting the clamp on the post, see if it's loose.
Posted: Sun Feb 10, 2019 1:28 pm
by smj999smj
...or, crank position sensor. Get the codes checked.
Posted: Sun Feb 10, 2019 3:43 pm
by king_wrecks
The battery isn’t very old but I haven’t checked/cleaned the posts. In the original post I failed to mention the issue started with a nearly empty tank when the weather was at or below freezing. As for repetition, it pretty much does it every time I start it. Also, I had recently burped the coolant system and was almost a gallon low.
As for crank position sensor, how invasive is that repair? Basic hand tools and a Haynes Manual?
Someone with a Murano told me I should check the fuel dampener. Anyone have any experience changing one of those?
Posted: Mon Feb 11, 2019 11:44 am
by Graham W
Might sound daft but have you tried a new fuel filter ?
Just read about the fuel getting low when it was cold,
maybe, just maybe the pump dragged a load of crap from
the bottom of your tank which now lives in the filter blocking some fuel flow?
I’m a stickler for changing mine at least every 5000 or less if I think it’s getting sluggish. My old shogun used to throw codes up and a mechanic nearly put a new fuel pump in, but some one more on the hammer swapped the filter and told me to rag her home to clear the pipes.
It worked and I swapped the filter more than needed to keep the crap at bay, engine bay lol
Posted: Mon Feb 11, 2019 1:32 pm
by king_wrecks
I didn’t check the fuel filter but i think that’s be a good inexpensive place to start. I think I’ll also check the rubber seal on my gas cap. My mom had a check engine light because she didn’t put it on correctly. If I do both those and still have the same issues I might just take it to my mechanic so he can run his machine on it.
Posted: Mon Feb 11, 2019 7:28 pm
by smj999smj
Graham W wrote:Might sound daft but have you tried a new fuel filter ?
Just read about the fuel getting low when it was cold,
maybe, just maybe the pump dragged a load of crap from
the bottom of your tank which now lives in the filter blocking some fuel flow?
I’m a stickler for changing mine at least every 5000 or less if I think it’s getting sluggish. My old shogun used to throw codes up and a mechanic nearly put a new fuel pump in, but some one more on the hammer swapped the filter and told me to rag her home to clear the pipes.
It worked and I swapped the filter more than needed to keep the crap at bay, engine bay lol
R51's in the USA don't have a serviceable fuel filter; it's part of the fuel pump module inside the gas tank.
Posted: Mon Feb 11, 2019 7:33 pm
by smj999smj
king_wrecks wrote:The battery isn’t very old but I haven’t checked/cleaned the posts. In the original post I failed to mention the issue started with a nearly empty tank when the weather was at or below freezing. As for repetition, it pretty much does it every time I start it. Also, I had recently burped the coolant system and was almost a gallon low.
As for crank position sensor, how invasive is that repair? Basic hand tools and a Haynes Manual?
Someone with a Murano told me I should check the fuel dampener. Anyone have any experience changing one of those?
Crank position sensor isn't too bad to replace. You have to remove the right-front wheel and the plastic wheel well liner (you may want to get some new, 10MM push clips because the old ones have a tendency to break when you take them off). Once the liner is out of the way you can see the crank position sensor. It's held in with a single, 10MM head bolt. They are also a lot cheaper than the crank position sensor. I think a genuine Nissan part is around $35 if I'm not mistaken. Get the code read!!