DIAGNOSTIC MANUAL
Actions
1.
Verify IMP signal value is between 36 psi (248 kPa) to 42 psi* (289 kPa), with APP1 signal value
at 99.6%, and engine speed between 1800 rpm to 2200 rpm.
2.
Verify Exhaust Back Pressure (EBP) is less than 70 psi (414 kPa), with APP1 signal value at
99.6%, and engine speed between 1800 rpm to 2200 rpm.
NOTE – * IMP signal value may be as low as 29 psi (221 kPa) on lower horsepower configurations.
NOTE – Analyze 0 to 60 mph test signal values only during acceleration, and not deceleration or shifting.
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