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05 Titan running like crap! Need help!

6362 Views 10 Replies 4 Participants Last post by  DarkNight18
Need Help! IPDM? Cats? Or Fuel Pump???

I have a 2005 Nissan Titan with 105,000. A few weeks ago I was towing my camper and the truck started running ruff. Scanned code and p0174 came up. Ran sea foam in the gas and it started running great again and the SES light went off. A week later towing the camper again going up hill in 3rd gear at about 4000 rpm and all of a sudden the truck goes to crap. Can go over 25 mph SES light on and flashing. Towed 100 home. Codes p0300, p1168, p1051 came up. Replaced the F/A sensor 1 on bank 2, cleared the codes. Nothing changed, still runs terrible and only p0300 comes up. Tested all wires and voltage to the new AF sensor and all is good. Tried the ecm relay switch, changed nothing. I don't know where to go from here. Can I test the IPDM? Can I check to see if a cat is plugged? Maybe fuel pump? Please Help.....
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Update! I tested the compression in all cylinders and all tested good, but the 4 spark plugs on the passenger side were pitch black. Then tested the fuel pressure, 55 psi. Split the exhaust at the second converters and looked in. Driver side super clean, passenger side black and looked plugged. Split at the exhaust manifold on passenger side and the honeycomb in exhaust converter is completely gone. Took the secondary pipe off and the comple honeycomb was plug in the second converter. Oh well, at least I know the issue. Hope this helps someone else.
Hi ******, I know this thread was from a long time ago, but I just got the P0174 code and can't pass inspection with my check engine light on. Did your solution helped fix the P0174 code specifically? Any help would be much appreciated. Thanks!
I think the P0174 had more to do with the front O2 / fuel air sensor. I replaced that with a BOSCH sensor from Napa and is still working great. Good luck
Thanks a lot and sorry for digging this thread from the grave.
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