P2290
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Cross-Country
Joined: Apr 2016
Posts: 56
Likes: 7
From: Ohio
P2290
Truck has been running fine. Went to start the truck, starts up fine but runs rough and low on power. Only code is p2290. Icp at idle is 560-570. Truck starts up no problem. Ipr at idle fluctuates 21-26. I revved it and it hit 86 on the ipr. I replaced everything in the hpop system last winter. I have a feeling its the ipr valve sticking. Its an alliant power ipr. Icp readings are good. Swapped the icp out for a low mileage one I had on the shelf with no change. starts up fine hot or cold just runs rough and not full power.
Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 350
From: Breckenridge, TX
I'm not a parts swapper by default, but I would pull the IPR and check the screen on it and the seals.
There is a tool that you can manually control the IPR valve with for air testing so in theory there's a way to bench test the valve if you remove it, but I do not know what the correct values would be.
There is a tool that you can manually control the IPR valve with for air testing so in theory there's a way to bench test the valve if you remove it, but I do not know what the correct values would be.
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