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Express 1500 5.7 conversion 2001

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Old Mar 8, 2020 | 04:13 PM
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Default Express 1500 5.7 conversion 2001

Torqconverter doesn’t smoothly reengage after hard acceleration above 55MPH. Must coast out to allow converter to slowly settle back in. Then resume speed . Normal acceleration without disengaging OD work normally.
sense is converter shudder. Installed liquid fix but condition didn’t change.
reoccuring codes 141,161,300,446 and 507. Only occurs on hard acceleration. Other wise no codes on regular operation.
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Old Mar 8, 2020 | 10:58 PM
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If those are "P" codes there'* several things effected but not the TC itself. I believe the TC issue is a product of the vehicle having these other issues.
I would look for a blown fuse first and see if you can find the O2 heater problem and go from there.
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Old Mar 12, 2020 | 10:17 PM
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what carfixer007 said ^^^^^^^

. . . and:

If those are P codes:
P0141 Bank 1 rear oxygen sensor heater circuit problem
P0161 Bank 2 rear oxygen sensor heater circuit problem
P0300 Random and/or multiple misfire
P0446 Improper voltage drop in evap vent valve
P0507 Idle speed higher than expected.

What'* up with the both rear oxygen sensors?

Misfires could be caused by several things. Is all of the maintenance caught up?

Check for vacuum leaks etc.

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