Built-in oscilloscope: Yes
or better quality
the inlet and outlets are both radiused at the ends and tapered at a certain angle for optimal fuel throughput
Recommended for 4-cylinder
GM 4pin Stepper Motor Plug & Pin set Transmission Accessories Built-in oscilloscope: YesPlug & Pin set for Common 4 pin GM Stepper motors used in Idle Air control valves. Reference Part Number: PT127, PT2300, 12085506, 88862219, S555, 1P1047, 85112 Compatible with: Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac 6000, 98, Achieva, Allante, Astro, Beretta, Blazer, Bonneville, Brougham C1500, C1500 Suburban, C2500, C2500 Suburban, C3500, C3500HD Camaro, Caprice, Cavalier, Celebrity, Century, Commercial Chassis, Corsica Corvette,