Cylinder contribution imbalance - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 10-09-2012, 10:30 AM Thread Starter
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Cylinder contribution imbalance

When I first start my engine in the mornings I'll get a cylinder contribution imbalance code on number 2 and 8. Also trick runs a little ratty around 1800-2000'ish then smooths out and sounds fine after that. So
Stones truck run smooth and sounds great all together then goes back to running ratty again.. Any clues? Electrical issues maybe?..

09 white fx4, icon leveled..37x12.50 toyo mt,20in rockstars,spartan 275,4in tbe,s@b intake
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post #2 of 4 Old 10-09-2012, 12:20 PM
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maybe an injector?

08 F350 cc/sb 4X4
h&s minimaxx, 5" flo pro, 4" down pipe, no limit cold air intake, dirty diesel EGR delete with intake elbow, 6.0 exhaust manifolds, custom up pipes, ported intake manifold, Apex 71mm LP turbo, Rudy's cold side pipe, diesel site coolant and transmission filter, diesel site intercooler boots, ccv mod, bilstein shocks, gogo dd solenoid, HID lights, Airdog II 165, PMF traction bars, PMF drag link, moshimoto aluminum radiator
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post #3 of 4 Old 10-09-2012, 02:48 PM
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Some guys have posted some pretty nasty pictures of the inside of the intake manifold caked with a bunch of oil and general gunk. It is possible that his might be so clogged that it is keeping air from getting to a couple of cylinders? This might be magnified if these two cylinders are towards the back of the block. There has been some talk of the back two cylinders not getting enough air due to the design of the intake. Not sure at all on either of these two....... just trying to throw idea's out there.
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post #4 of 4 Old 10-10-2012, 12:03 PM Thread Starter
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Just had the engine rebuilt. Surely they checked for that:/.. Thanks for the help!

09 white fx4, icon leveled..37x12.50 toyo mt,20in rockstars,spartan 275,4in tbe,s@b intake
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