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Forum: Diagnostics & Troubleshooting

Powertrain | Performance | Electrical |

  1. Sticky Thread Sticky: Crankshaft System Variation Learn Procedure

    The CKP System Variation Learn procedure concerning the relationship of the Crankshaft Postion Sensor, or CKP, to the crankshaft reluctor was...

    Started by RedHeartbeat‎, 09-16-2007 02:31 PM
    3 Pages
    1 2 3
    • Replies: 24
    • Views: 16,811
    10-30-2009, 12:40 AM Go to last post
  2. Sticky Thread Sticky: Idle Learn Procedure

    The Idle Learn procedure may be required when: 1.) The PCM loses power or ground (battery or PCM disconnected) 2.) Service programming is performed...

    Started by RedHeartbeat‎, 09-16-2007 02:02 PM
    • Replies: 0
    • Views: 5,988
    09-16-2007, 02:02 PM Go to last post
  1. 2000 Silverado 5.3L fuel pressure still low after new pump and more...

    2000 Silverado 5.3L 2WD 1500 RCSB w/ ~165Kmi - all stock Fuel pressure still just under spec after new pump and more... I replaced the fuel pump...

    Started by 2Kchevy‎, 12-09-2019 06:14 PM
    • Replies: 0
    • Views: 13
    12-09-2019, 06:14 PM Go to last post
  2. MAF/IAT Sensor signal voltage too high??

    Finally got my 4.8l Vortec conversion to start - but it will absolutely not idle and dies unless I keep foot on the throttle. Getting a strange IAT...

    Started by acerman‎, 12-02-2019 10:10 PM
    4.8l, maf. iat
    • Replies: 0
    • Views: 25
    12-02-2019, 10:10 PM Go to last post
  3. 05 Silverado throwing codes with loss of power

    My 05 Silverado is throwing codes P0120, U0107, P0220, P0446, P1516 Have replaced throttle position sensor and wiring harness. Ran good for a few...

    Started by Jayce1965‎, 11-17-2019 11:05 AM
    • Replies: 0
    • Views: 53
    11-17-2019, 11:05 AM Go to last post
  4. no start - PCM problem?"

    I purchased a '93 C1500 with a '00 4.8L Vortec conversion earlier this year. Put about 5000 miles on it and it died in the driveway last week. ...

    Started by acerman‎, 11-04-2019 12:33 PM
    4.8l, ecm, no start, pcm
    • Replies: 1
    • Views: 111
    11-05-2019, 04:33 PM Go to last post
  5. Spark Knock Issue

    I need some input on a spark knock issue under light acceleration for my 2003 4.8, manual trans silverado. Went to 89 octane. Changed PCV, plugs,...

    Started by bdeboyes@ec.rr.com‎, 02-09-2019 01:36 PM
    • Replies: 3
    • Views: 484
    10-06-2019, 08:04 PM Go to last post
  6. No start no crank pcm no 12v reference

    so let me start out with what i have so my truck was already swapped with a lq4 and 4l60 so im in the process of swapping this 416ci and 4l80 combo...

    Started by Sierra416‎, 02-28-2019 04:18 PM
    • Replies: 1
    • Views: 343
    08-29-2019, 01:22 PM Go to last post
  7. 2005 Silverado 4.8 noid light on solid

    I have a 2005 Silverado 4.8 I recently bought, and it has a mis on cyl 7. Replaced plugs, wires, and coil on cyl 7. Still miss's, checked spark...

    Started by Geardo‎, 08-10-2019 01:13 PM
    • Replies: 1
    • Views: 378
    08-29-2019, 01:15 PM Go to last post
  8. Fuel pressure regulator

    Still having issues with mine cold starting, so I changed the fuel pressure regulator and now I have this buzzing/vibrating sound?

    Started by Esky02‎, 11-23-2015 03:28 PM
    • Replies: 1
    • Views: 885
    07-21-2019, 09:51 AM Go to last post
  9. Engine Runs Cold

    New guy here, of course with a problem... I have a 2000 Silverado 1500 ECSB that had a 4.8 and MG5 5-speed. At 252k on the clock it was time to...

    Started by 2K_Silverado‎, 03-05-2019 06:35 PM
    • Replies: 3
    • Views: 1,562
    03-14-2019, 08:44 AM Go to last post
  10. 00 Silverado 5.3 automatic transmission problem

    My truck cant go any faster than 35 m/h it switches first and second gear but doesnt switch to third gear the speedometer works good the reverse...

    Started by Ismael Torres‎, 04-08-2018 10:21 AM
    • Replies: 2
    • Views: 1,501
    03-02-2019, 10:31 PM Go to last post
  11. 0411 swap problem - getting $0281 error code on autocal

    96 chevy SBSC with L31R I have performed the repin for the 0411 per the spreadsheet from Lextech. I just got my flash/tune from Blackbear, and am...

    Started by homeslice‎, 10-13-2018 08:01 PM
    • Replies: 4
    • Views: 1,104
    02-24-2019, 11:59 AM Go to last post
  12. Dương vt silicon hit đất rung thụt ngoáy

    Giá sản phẩm: 680,000 VNĐ Liên hệ:0389.346.762 Mis. Hằng Tnh năng: Kch thch điểm G, âm vt, giải tỏa sinh lý hiệu quả...

    Started by saobanggps‎, 11-14-2018 05:42 AM
    • Replies: 0
    • Views: 496
    11-14-2018, 05:42 AM Go to last post
  13. Missing on all cylinders in cammed Tahoe

    Ok guys, I have an 05 Tahoe that has about 6k on it since rebuild. About two weeks ago I got a stumble while driving in town and the dreaded...

    Started by RU11550‎, 08-04-2018 01:51 AM
    • Replies: 2
    • Views: 1,090
    08-15-2018, 06:18 PM Go to last post
  14. Dreaded white smoke

    Helpppp.! I have a 1994 c1500/k1500 EFI converted to carburetor 305 short box stepside Frankenstein.. i recently noticed a shit ton of white smoke...

    Started by groves069@gmail.com‎, 03-17-2018 06:32 AM
    • Replies: 0
    • Views: 561
    03-17-2018, 06:32 AM Go to last post
  15. 01 silverado 4.8 engine has miss

    I just bought a nice 01` shortbed with 200k seems to run ok but has a shake in engine po300 code and po308 put new plugs and wires ,switched coil...

    Started by oldman‎, 12-12-2016 07:30 PM
    • Replies: 4
    • Views: 1,703
    03-17-2018, 01:26 AM Go to last post
  16. Check engine

    I have a 99 4,8 silverado that has a check engine light that I think was thrown when I installed long tube headers on the truck , I have no cats and...

    Started by Issav6‎, 08-22-2017 10:28 PM
    • Replies: 1
    • Views: 629
    03-17-2018, 01:23 AM Go to last post
  17. 02 gmc Yukon xl 5.3 whole lot of nonsense

    127xxx, runs great. Just got it 3 weeks ago. Took it straight to oriellys and ran codes, co265,po171 po300, po420,po442,po446,po174. I replaced power...

    Started by 02gmcyukonxl5.3‎, 08-29-2017 07:19 PM
    • Replies: 1
    • Views: 619
    03-17-2018, 01:22 AM Go to last post
  18. 2003 chevy silverado fouling o2 sensor after closed loop

    Hi every one I am having trouble figuring this one out. The problem I am having is weird. The truck runs fine at start up. Then after I drive for a...

    Started by jaysonolson‎, 01-12-2018 01:05 AM
    fouled o2 sensor, hesitation, ruff idle, smell of fuel
    • Replies: 1
    • Views: 753
    03-17-2018, 01:19 AM Go to last post
  19. best way to flush crud out of cooling system???

    so I posted a thread a while back about having some overheating issues when towing my new to me boat and still have not resolved the issue. I still...

    Started by kewljay223‎, 08-16-2017 03:28 AM
    • Replies: 3
    • Views: 1,413
    01-15-2018, 08:57 PM Go to last post
  20. 02 gmc Yukon xl 5.3 whole lot of nonsense

    127xxx, runs great. Just got it 3 weeks ago. Took it straight to oriellys and ran codes, co265,po171 po300, po420,po442,po446,po174. I replaced power...

    Started by 02gmcyukonxl5.3‎, 08-29-2017 07:25 PM
    • Replies: 1
    • Views: 1,579
    01-15-2018, 08:46 PM Go to last post

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