Recent content by persistent

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    rough shift 1st to 2nd: fast service learn

    i used the cgsulit sc530, my cheapest scan tool, to do the fast service learn. the shifting issue is substantially improved from earlier, but it still misses every so often. i will update after another few 100 miles of driving if it sorts itself out. if the problem persists post-fast-learn, i...
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    rough shift 1st to 2nd: fast service learn

    i've recently done a dod delete, and i also did a transmission fluid flush and filter change. the vehicle had the battery disconnected for long periods of time, and i experienced battery problems to the point i had to replace the battery a few days ago. i am experiencing missed/rough shifts from...
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    reset steering angle sensor problem - SOLVED

    it ends up that attaching the new sensor did not clear the c0710 and c0544 codes. i pulled the steering column, replaced the sensor, reinstalled the steering column, and then i was able to do a sas relearn successfully from my xtool d8s. the sas relearn cleared the c0710 and c0544 codes and...
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    reset steering angle sensor problem - SOLVED

    after connecting the new sensor, i have noticed that the steering angle dtcs (c0710 and c0544) have gone from current to history, which i assume indicates they are no longer active. i will remove the upper steering column, install the new sensor and see how things go.
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    2020 6.2L: misfires, lifter issues and engine replacement - SOLVED

    hah, i'm on month 4 of repairs, but i'm just fixing up the last bits now (dead steering angle sensor and related dtcs).
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    reset steering angle sensor problem - SOLVED

    i grabbed a replacement sensor, part 13590209, from the local dealership, and i have confirmed that hp tuners mpvi3 can see live angle data from the replacement sensor, whereas it cannot see any live data from the installed sensor. the mpvi3 does not support sas reset or learn, and neither of...
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    reset steering angle sensor problem - SOLVED

    i cannot get steering angle sensor data from either of the 2 scan tools listed above nor hp tuners mpvi3. am i right to say that the steering sensor needs to be aligned similar to the clock spring, meaning i may have to recenter it manually? i see videos about replacing steering sensors...
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    reset steering angle sensor problem - SOLVED

    appreciate the reminder to rtfm. the service and repair manual i have suggests doing 2 things to address the C0710 code: first, use a scan tool to read the steering wheel angle and confirm it varies continuously over its full range (-550 to +550 deg), then perform the sas recentering procedure...
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    steering column out of alignment after removing steering gear

    after removing the steering gear and confirming it was indeed properly centered by marking the stops and the center, i reinstalled it yesterday and reconnected the rest of the steering column and steering wheel. surprisingly, i found that after reinstallation of the steering gear, the large...
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    reset steering angle sensor problem - SOLVED

    i have completed a deep engine repair (failed piston rings), and i am struggling to get past the issues i'm having with the steering system. i had a major misalignment with my steering gear, fixed it, got the steering column lined up properly, adjusted the inner tie rod bolts to set the toe, and...
  11. P

    fuel injector voltage probe location

    i was looking to get the live waveforms from this vehicle in particular, but it's not a huge deal if i can't access the injector ground wiring. appreciate the pointer to do an injector balance test because that accomplishes what i was after with less work. it looks like most decent...
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    fuel injector voltage probe location

    having recently repaired a failed set of piston rings on 1 cylinder, i'm trying to improve my diagnostic skills and evaluate a hypothesis from @Pressureangle about the corresponding fuel injector having a problem, e.g. opening for too long relative to the other cylinders. i've got a picoscope...
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    2020 with slight vibration at idle

    any time there are misfires, you should get a scan tool and check the dtcs. when i was having regular misfires on 1 cylinder, the ecm would increase the timing advance until it would drop back to zero and repeat. it created a sawtooth pattern for engine rpm, where it would surge up to 700 then...
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    2017 LT Tahoe 5.3 Randomly Starting

    i assume you don't see a battery icon when you attempt to start the engine and it fails. without some indicator that the battery is low, the fact that it powers up suggests your battery is ok. the best way to test the battery is a simple battery tester, e.g. ancel BA101 tester. if the battery...
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    2018 Yukon 6.2 strange sound

    i recently had a consistent misfire on cylinder 8, and i learned the hard way that you should always do compression and leakdown tests to confirm the cause. do you have any other codes beyond the P0306 for the cylinder 6 misfire? is the check engine light solid or blinking? having spent a fair...
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