Does a 97 Chrysler LHS 3.8L have a TAC vacuum motor or valve, is there another name for it?

Car will not idle backfires through intake at less than 1K RPM when holding rpm with foot on accelarator pedal. Chilton's manual references the TAC motor or valve. I can't locate in in their vacuum diagrams and I have found erros in the manual.
Update: in addition to back firing through intake it also: surges at all speeds, stalls at idle or upon deacceleration at low speeds -20mph Smells hot and sounds like there is backpressure at low RPM when cold. Difficult to rev above 3K when cold when warm engine revs fine above1K. Thanks for input Gave codes... show more in addition to back firing through intake it also:
surges at all speeds, stalls at idle or upon deacceleration at low speeds -20mph
Smells hot and sounds like there is backpressure at low RPM when cold. Difficult to rev above 3K when cold when warm engine revs fine above1K. Thanks for input
Gave codes indicating O2 sensor codes 21,21,52. Replaced all 4 sensors. 52 cleared but code 21 reappeared in succession once again. isolated O2 from PCM and checked for short on Rt bank sensor none found. Pulled EGR and cleaned EGR checked upper diaphram, holds vac. Found Rt bank inlet to air plenum partially blocked-cleaned. Noticed Rt port smaller diameter, normal? Replaced plugs.Checked vacuum lines.
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