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About sefiroxx

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  1. Check for worn spots. Happens on my 01 burb when I let the tires get worn down without rotation. Rotating front to back, or turning a single front 180 usually solves the problem. Worn spot on one will often transfer to the other in the same locale. Sent from my XT1053 using Tapatalk
  2. Plastic or metal piston. If metal, then someone may have tuned the system. Look here: https://www.wittrans.com/parts?type=4L60E&section=32_valve Sent from my XT1053 using Tapatalk
  3. Starter has two wires. One directly connected to the battery (larger wire). The other is the control wire connected to the solenoid and controlled by the ignition/security system. Doing the bypass, takes the ignition/security system out of the equation , leaving just the main connection to the battery (and the ground connections). Sent from my XT1053 using Tapatalk
  4. Bypass the starter relay. Use a wire to connect large terminal to small wire terminal on the starter. If it behaves the same, then battery/ground problem. If it turns over, then control problem either through ignition or computer Sent from my XT1053 using Tapatalk
  5. Listened, need stethoscope to pinpoint Sent from my XT1053 using Tapatalk
  6. Before fishing and changing everything, get a mechanics stethoscope (HF cheap). Metal stick with rubber tubes to ears. Place stick on various components Sent from my XT1053 using Tapatalk
  7. GM changed the gap specification when iridium plugs became popular, so stick with .4. - Clean throttle body, change filters, etc. - Injectors change is not hard, just time consuming. Have to remove stuff to allow for room to raise fuel rail. May want to replace intake manifold seals etc. - may be time to change differential and yoke seals. Differential has magnet inside so when replacing gasket, clean off magnet and inspect for large chunks. Be sure to retighten cover bolts after driving for a bit. Sent from my XT1053 using Tapatalk
  8. Common issue with blocked airflow. Hvac systems are designed with a matching airflow for the amount of cooling, meeting the requirement that the system absorbs heat from the air to warm up the freon so it doesn't freeze condensate. Blocked air flow allows the condensate to remain on the coils and freeze. Remove the air filter, and run the fan only in a warm place, be prepared for a large amount of water under the vehicle. You'll need a scanner to confirm if any dtc's are set, and to read temps produced by the sensors. Sent from my XT1053 using Tapatalk
  9. Fuel pump should have shut off when parking it so there should not have been that much gas in the system. However, the initial cranking after sitting would have distributed gas ladened oil throughout the system so you may be getting some extra ignites as the gas burns off. Try staining the system, pull plugs and even partially drop pan to let it dry out. Refill with oil,, disconnect wires and crank for a bit to circulate oil to wash down. Rinse, repeat. Button up and try starting again. Sent from my XT1053 using Tapatalk
  10. It guess through the pcm. Scan tool manual tcc engage bypasses the sensors. A better tool will monitor and show the readings from the sensors and show when the pcm has engaged the tcc. Sent from my XT1053 using Tapatalk
  11. Computer controls lockup timing based on: - gear engaged (only 3rd and 4th) - fluid pressure (needed to ensure that impeller and turbine are close to same rotational speed) - desired driver action as projected through tps angle or brake. (Ie Large tps indicates desire to accelerate so no lockup as tranny will down shift). - engine rpm and road speed Sensors or wires for any of the above could be bad and sending wrong info to computer. I believe there is a tsb on the tps related to your symptom, can't remember if it's applicable to your set up. First, be sure you are up on maintenance. Tranny fluid change, clean throttle and butterfly, verify cruise control works and brake will release it, check obvious wires, any other dtc's? Sent from my XT1053 using Tapatalk
  12. Could be a shorted wire to the solenoid. Pull the fuse for the starter and see if it still engages. Sent from my XT1053 using Tapatalk
  13. Battery test first. Sent from my XT1053 using Tapatalk
  14. I have bought 2 dahmer rebuilt's with 3 year+100k warranty. Been running great without any problems. Sent from my XT1053 using Tapatalk
  15. You'll need a better scanner to see the shift Commands. User it to verify a 4th gear was Commanded. If not, then tps/rpm/tow sensor are off. If commanded, then solenoid, accumulator, valve, band. Pam drop to see if anything is in the pan. If not, then solenoid/electrical likely (but should have shown up as check engine) Sent from my XT1053 using Tapatalk

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