Troubleshooting

The Flooded Pickup

Jan. 1, 2020

The Flooded Pickup

Dear Roy,
I am working on a 1992 Ford F-150 pickup, VIN 1FTEX15Y3NKB27696, with a 4.9L engine and an E-4OD transmission. It floods on cold take off in open loop only.

Injector pulse increases to 35 M.S. TPS at 1.7V. MAP goes to 150 Hz. I have checked the CTS, TPS, ACT and MAP; unhooked the EGR; replaced the ECA with an updated one; and checked fuel pressure.

I need help. Ken Anthony
Adams Garage, Duncan, OKDear Mr. Anthony, During cold engine operation in open loop, the ECA ignores the O₂ sensor and typically tailors its fuel delivery based on internal programming and inputs from temperature (CTS), driver

About the Author

Roy Ripple

Roy Ripple passed away in September 2021 at the age of 84. He was an automotive technician his entire life. He owned his own shop for years before his first and only venture into automotive journalism, with Motor Age magazine. In his youth, he was an avid drag racer and a good friend of Don Garlits. He raised four children, rode motorcycles, hunted deer, and loved to shoot trap. His son, Roy Dennis Ripple, now writes for Motor Age. You can see his work here.