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P1507 Diagnostic Trouble Code Discussion for February 2018

Idle Control System Malfunction


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Trouble Ticket Help Requests for DTC P1507
Help Request Posted
1998 Ford F-150 XL 4.2L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1FTZX1723W
P1507: IAC underspeed. ... is running crazy rich. As listed above STFT1 and STFT2 are pegged at -20% @ idle and @ 3K rpms. F/P is good (34-37psi running). Modis reads no Faults on any injectors. Fuel pulse width is .01 (but not absolutely sure on this). TPS at 19.6 degrees. All ...
February 05, 2018
1998 Ford F-150 XL 4.2L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1FTZX1723W
P1507: IAC underspeed. ... is running crazy rich. As listed above STFT1 and STFT2 are pegged at -20% @ idle and @ 3K rpms. F/P is good (34-37psi running). Modis reads no Faults on any injectors. Fuel pulse width is .01 (but not absolutely sure on this). TPS at 19.6 degrees. All ...
February 07, 2018