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ryjaytay38

Rough Running 2001 Pathfinder

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Hey guys,

I haven't been on here for a while, but I have a question/concern/problem. I live in Phoenix where the last few days has been 115+degrees. I don't know if that has any bearing on this. It took my AC a long long time to start cooling yesterday even though the freon is good and again, I don't know if that has anything to do with anything other than it's damn hot!! Today, I went out and fired up the truck. Driving down the road and noticed it running really rough. Stop at a light and it doesn't stall but really idling rough. My temp isn't going up and getting no check engine light. I put the obd meter on and have nothing. My first thought was head gasket but there's no smoke, no fluid from the tail pipe. Then I started thinking fouled plugs, fuel filter. I don't know where to start. I'm tempted to go to Oreillys and get the head gasket tester to ease my mind. Does anyone have any thoughts?

Thanks in advance!!

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Finally, this afternoon I got a check engine light. It's cylinder #3 misfire. If the engine will cool down, probably by about 2am, I'll check the plug, coil and wires and see what I can find. 

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I got the to the Pathfinder about 11pm last night when the temp dropped to a balmy 108. Looks like the ignition coil pack is good, spark plug good, and wiring is good. Swapped it to the #4 but code did not follow. Also plugged them together and turned the key a split second and sure enough, there's spark. I'm thinking now we're looking at #3 fuel injector. I've been down the injector road before and never a pleasurable experience having to pull so much off just to get to the injectors. If anyone knows any shortcuts or easier ways to get to the injectors, please enlighten me. I just put a new engine in a 99 Isuzu trooper. Same 3.5 motor but Nissan has to make it so you have to fight every step of the way compared to the Isuzu. I can pull injectors out of the Isuzu within minutes. There's no pulling manifolds and everything else that Nissan throws in there. So frustrating 

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