Improper tuning???

SmokeyTex · Feb 12, 2019

Finally got done with my motor build (for now), and I am having serious issues with tuning. I have a Hydra chip and reached out to Full Force for custom tuning and Gear Head. The damn truck is steadily puffing out blackish grey smoke, and it burns your eyes like top fuel drag cars. The only code I pull is the P0541 intake heater! Everything is new from the topside up with 250/200 single shots.

superpsd · Feb 13, 2019

Usually when its that bad it burns your eyes its an injector problem. Run a CCT and Buzz test.

SmokeyTex · Feb 13, 2019

Pull the covers off and isolated each injector one by one, and there was very minuscule change in smoke. The truck is running fine (no miss, knocks, etc.) until I start isolating injectors. Gotta wait until tomorrow for my new diagnostic tool for the Buzz test.

superpsd · Feb 13, 2019

Is it currently running tuning to complement the injectors?

SmokeyTex · Feb 13, 2019

I’m assuming they tuned it for single shots, the injectors sound happy anyways... They are 250/200 Full Force single shots and the “custom tuning” was also from Full Force.

ghohouston · Feb 14, 2019

If tunes are good, kind of sounds like maybe an injector not fully seated or a copper washer issue.

SmokeyTex · Feb 14, 2019

I did notice one of the injectors oil skirt was a little loose... Maybe not seated properly idk... The strange thing is that it just started happening after I cranked the truck the other day. Almost like it happened over night? :wtf:

DZL JIM · Feb 19, 2019

Pull the chip completely and see how it runs. Not a STOCK tune, but remove it.
Might have a rough idle but stock tuning does pretty well overall to run larger injectors.
After pulling the chip if it has a rough idle, unplug the ICP and see what all changes.

Won't cost anything but a few minutes of your time.

SmokeyTex · Feb 24, 2019

CCT Results
P0266 #2 Unbalance
P0275 #5 Unbalance
P0541 IAH

Buzz Test
P1271 #1 Injector High to low side open
P1272 #2 Injector High to low side open
P1277 #7 Injector High to low side open

SmokeyTex · Feb 24, 2019

Have a P1316 IDM circuit failure code too.. Gonna bust out the ohm meter!

Zeb · Feb 24, 2019

P1316 code comes from the high to low side open codes. High to low side open codes come from too much resistance in the circuit from the IDM to the injector.
It could be in the harness, it could be in the uvch, it could be the injector solenoid, and it could be from improper clearance between the armature and solenoid when the injector fires.
When you did the buzz test, did some of the injectors buzz quieter than the others?

SmokeyTex · Feb 24, 2019

Pulled #1, #2, #5, #7 injectors to inspect health, and they look like 400 mile injectors should. Replaced everything in the heads so now I am wondering if its and IDM problem since I'm getting faults on both banks? Starting to piss me off... :fustrate:

SmokeyTex · Feb 24, 2019

No noticeable sound difference between buzz tests, I even isolated each injector to see which ones were contributing. Every injector that I isolated made the truck noticeably stumble except for #7.

SmokeyTex · Feb 24, 2019

ICP DC% 14.0 @ 680rpm
ICP PSI 720 @ 680rpm

psduser1 · Feb 24, 2019

Not an idm problem.
Possibly a uvch problem.
Swap #7 injector over to the other bank, rerun the test, and see if the problem follows the injector, or stays at the 7 hole.
Faults on both banks, in my mind, would indicate a connection issue in the harness between the idm, and the 42 pin connector, since both banks are showing electrical problems.

psduser1 · Feb 24, 2019

SmokeyTex said:
ICP DC% 14.0 @ 680rpm
ICP PSI 720 @ 680rpm

Engine temp?
Those look like cold idle numbers (cold being 20-30ish).

lincolnlocker · Feb 24, 2019

psduser1 said:
Engine temp?

Those look like cold idle numbers (cold being 20-30ish).

Id suspect uvch also. Check them over for any bad spots like black/burnt connections.

Those also look like default icp numbers like the sensor isn't working.

live life full throttle

SmokeyTex · Feb 24, 2019

Just got done swapping injectors to opposing banks and rotated them according. I am thinking the problem may be in the old 42 pin like psduser1 said. The uvch's are brand new as well so I went ahead and swapped those to opposite banks too to see if the problem persists. I got lazy when I did the build and skipped splicing in the new 42 pin pig tail :doh:

SmokeyTex · Feb 24, 2019

Seems like the thermostat is stuck coincidentally! let the ol girl idle for about 30 min and no temp change on the dummy gauge or my Aeroforce. Gonna give an update on it all tomorrow after work! Thanks!