try it with stock programming
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Engine shutters
Seem right around 20% throttle cruising on highway I notice this the most. The engine will shutter, like if you were to quickly press and release the peddle fast and make the truck jerk. After some reading I was thinking this may be my peddle having a bad spot (being electronic) put a new one on tonight but have the same problem. This issue started after I put in new injectors (BBI 1.5). I had some FRP issue's after the upgrade and went with the Fleece 10mm pump and PPEI tunning. Tonight I noticed that while using cruise control it is worse. Holding speed at 70 MPH or right around 2100-2300 RPM's it will get bad. If I press the pedal it will clear up and come back after a bit more cruising. Also, if I come off the highway after some heavy pedal and come to an idle the truck will start beeping (10 times) and turn on the dash grid heater light, and it kills power to below a stock tune. This code is P1222, I can clear this using the edge but will come back over time. I pulled the valve cover and was going to start pulling everything off and check for any problems tonight but figured I would ask here. Any clue what could be causing this?
*I should add, idle, running through the gears it runs fine. It's just around the 2100-2300 RMP's. When cruise control is used the Edge will show 0% APP, should of caught this prior to purchasing a new pedal.
*I should add, idle, running through the gears it runs fine. It's just around the 2100-2300 RMP's. When cruise control is used the Edge will show 0% APP, should of caught this prior to purchasing a new pedal.
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my truck in sig was doing the shuddering on a trip to north Carolina this past weekend and I was using smarty tuning for the trip. I ended up going with stock injection timing and it cured my shudder. I have almost the same feeling setup as you.Okay, I went back through each injector and tube I remember cyl 1 tube not clicking when I first installed the tubes. I still couldn’t get it to snap in so I tried a different tube and got it to “snap in” along with the rest of them. I also replaced the banjo bolt injector return valve on the back of the head. I no longer have a long crank time to start, it’s now instant. Also my EGT’s dropped significantly. I haven’t thrown a code for the P1222 yet, need to drive it a bit more but I think it’s good.
Still have the shuttering, pretty consistent at 2k rpm’s while in cruise control. Any other known sensors that may be causing this?
the truck in my sig is setup similar to yours and I had the shudder on a trip to north Carolina this past weekend but I was using smarty tuning as I thought it would get me better mpg than my race tune. anyways I ended up having to go with stock timing to get rid of the shudder.Okay, I went back through each injector and tube I remember cyl 1 tube not clicking when I first installed the tubes. I still couldn’t get it to snap in so I tried a different tube and got it to “snap in” along with the rest of them. I also replaced the banjo bolt injector return valve on the back of the head. I no longer have a long crank time to start, it’s now instant. Also my EGT’s dropped significantly. I haven’t thrown a code for the P1222 yet, need to drive it a bit more but I think it’s good.
Still have the shuttering, pretty consistent at 2k rpm’s while in cruise control. Any other known sensors that may be causing this?
1 - 3 of 14 Posts
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