Martin Truex Jr. will start at the rear of the field due to an engine change prior to Sunday’s FanShield 500 for the NASCAR Cup Series at Phoenix Raceway (3:30 p.m. on FOX, MRN, SiriusXM NASCAR Radio).

The No. 19 Joe Gibbs Racing team swapped out the power unit of its Toyota Camry before pre-qualifying technical inspection Saturday morning at the 1-mile oval.

Truex posted the 24th-fastest time during Friday afternoon’s opening practice session, followed by a 25th-place result in final practice.

NASCAR Cup Series Busch Pole Qualifying is slated for 2:35 p.m. ET on FS1.

Last weekend, Truex’s car failed inspection three times and he had to also start at the rear then as well.