Throtte Body Gremlins...!~@#$%^&*
09-07-2011, 10:28 AM
#44
Is the cover on the Throttle Body riveted or clipped on?
Have you tried pulling the terminals from both the T-Body connector and the TAC modlue and soldering the crimps? I have found this to fix about 40% of the 5% that replacing the T-Body didn't fix. The other 60% of the 5% I rewire and solder the crimps
95% of the time a new Throttle body fixes the issue if DTC P2135 is set
The other 5% is a wiring issue. I end up rewiring the TPS and TAC Motor circuits about 6 out of every 10, but first I try soldering the crimps and it works 4 out of the 10. It takes me 10 minute to solder the crimps and then I am off on my test drive. If it doesn't fix it I am only down 20 minutes vs an hour and a half to restring wires crimp new ends on and the test drive.
I had 1 bad TAC module in the last 12 years. That was way back in 2002 and that was on a 8.1L Avalanche.
Have you tried pulling the terminals from both the T-Body connector and the TAC modlue and soldering the crimps? I have found this to fix about 40% of the 5% that replacing the T-Body didn't fix. The other 60% of the 5% I rewire and solder the crimps
95% of the time a new Throttle body fixes the issue if DTC P2135 is set
The other 5% is a wiring issue. I end up rewiring the TPS and TAC Motor circuits about 6 out of every 10, but first I try soldering the crimps and it works 4 out of the 10. It takes me 10 minute to solder the crimps and then I am off on my test drive. If it doesn't fix it I am only down 20 minutes vs an hour and a half to restring wires crimp new ends on and the test drive.
I had 1 bad TAC module in the last 12 years. That was way back in 2002 and that was on a 8.1L Avalanche.
09-07-2011, 10:44 AM
#45
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response in red
Is the cover on the Throttle Body riveted or clipped on?
the LS2 has the security screws. the 87 has clips iirc
Have you tried pulling the terminals from both the T-Body connector and the TAC modlue and soldering the crimps? I have found this to fix about 40% of the 5% that replacing the T-Body didn't fix. The other 60% of the 5% I rewire and solder the crimps
i have not tried soldering them. i have removed 6" from the TB end of the harness and re-pinned it.
95% of the time a new Throttle body fixes the issue if DTC P2135 is set
The other 5% is a wiring issue. I end up rewiring the TPS and TAC Motor circuits about 6 out of every 10, but first I try soldering the crimps and it works 4 out of the 10. It takes me 10 minute to solder the crimps and then I am off on my test drive. If it doesn't fix it I am only down 20 minutes vs an hour and a half to restring wires crimp new ends on and the test drive.
i have tried 87 and 90mm TBs...both set codes. when i plug in a 78mm, the codes clear at key run but i cant start it due to the blower TB flange and the shortened harness wont reach.
I had 1 bad TAC module in the last 12 years. That was way back in 2002 and that was on a 8.1L Avalanche.
i have tried swapping TAC and pedal with no luck
the LS2 has the security screws. the 87 has clips iirc
Have you tried pulling the terminals from both the T-Body connector and the TAC modlue and soldering the crimps? I have found this to fix about 40% of the 5% that replacing the T-Body didn't fix. The other 60% of the 5% I rewire and solder the crimps
i have not tried soldering them. i have removed 6" from the TB end of the harness and re-pinned it.
95% of the time a new Throttle body fixes the issue if DTC P2135 is set
The other 5% is a wiring issue. I end up rewiring the TPS and TAC Motor circuits about 6 out of every 10, but first I try soldering the crimps and it works 4 out of the 10. It takes me 10 minute to solder the crimps and then I am off on my test drive. If it doesn't fix it I am only down 20 minutes vs an hour and a half to restring wires crimp new ends on and the test drive.
i have tried 87 and 90mm TBs...both set codes. when i plug in a 78mm, the codes clear at key run but i cant start it due to the blower TB flange and the shortened harness wont reach.
I had 1 bad TAC module in the last 12 years. That was way back in 2002 and that was on a 8.1L Avalanche.
i have tried swapping TAC and pedal with no luck
09-07-2011, 11:12 AM
#46
About 6 months ago I had an Escalade that came in with a P2135. I sold a new GM T-body, but the T-Body that was on it had been replaced 6 months before that and it had a New GM Wire Connector with wires on the T-Body also. I installed the T-Body and the guy came back about 4 months later with the same concern, but different DTC's and no P2135. I could not duplicate the DTC's so I soldered the crimps and shipped it back out. The guy returned 2 days later and now P2135 was the only DTC set.
I load tested the circuits by installing a headlamp bulb on each circuit and checking for a voltage drop. I also did this in paired circuits and found no differences in any of the circuits while wiggling and pulling on the harness and terminals. -- I sent the guy back out and he returned on the following Monday. I had enough and I rewired the circuits. I thhave not seen the guy in 2 months. Now was it a bad wire or was it the REPLACEMENT GM wire connector?
I load tested the circuits by installing a headlamp bulb on each circuit and checking for a voltage drop. I also did this in paired circuits and found no differences in any of the circuits while wiggling and pulling on the harness and terminals. -- I sent the guy back out and he returned on the following Monday. I had enough and I rewired the circuits. I thhave not seen the guy in 2 months. Now was it a bad wire or was it the REPLACEMENT GM wire connector?
09-07-2011, 11:43 AM
#48
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I reused the TB connector...I bought pins and recrimped with the proper tool.
I am 90% ready to do a DBC swap....too bad the 90+mm cable TBs are $$$$
codes are still P2135, P0120, P0220, P1515, P1518
I am 90% ready to do a DBC swap....too bad the 90+mm cable TBs are $$$$
codes are still P2135, P0120, P0220, P1515, P1518
