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89 F150 no start--flooding Jim Platt 3-2-03  
I have an 89 F150. It suddently started running rich and very rough. It now will not run and smells incredibly gassy. i pulled the codes and it indicated 2 sensors and i replaced them. it is still pulling these same codes after clearing them. New TPS, Coolant temp sensor, Intake Air Sensor, Fuel Pressure Regulator, and still no start and very rich. Any suggestions would be appreciated.
Re: 89 F150 no start--flooding Joe 3-3-03  
Jim, unless you get the coolant temp sensor to register properly, you will always get that flooding. If you can, do a KOEO test and see what your coolant temp registers.
Re: 89 F150 no start--flooding Sam Watson 3-2-03  
First thing I'd do is to see if your injectors ever turn OFF. Do this by removing the electrical connector to any one of them, connect an analog volt meter across the terminals inside the connector, and crank the engine over while watching the neddle, should swing back and forth as the computer closes and opens the ground. If it doesn't, then suspect the computer's injector driver. Come back with what you find. Another sensor that would cause this is the BARO/MAP sensor, but check the injector action first.
Re: 89 F150 no start--flooding Sam Watson 3-4-03  
Joe, I'm having a problem understanding why a temp sensor out of range would cause flooding to the point where the engine can't run. If it didn't indicate the min. 140 degrees to cause the computer to go into closed loop, it would still run OK. Please explain.
Re: 89 F150 no start--flooding Joe 3-4-03  
Sam,I had a 1988 Ford F150 4WD towed to my shop this winter from another that couldn't keep it running. They had changed about $400 worth of parts including parts of the ignition and fuel injection system. The vehicle turned over and almost started, but just blew black smoke. I put the scanner on it and it registered 34 degrees below zero. It had a new temp sensor, but nobody ever checked to see if it registered correctly. the temperature outside that day was mid 20's. I traced the wire to the fenderwell on the left side and foud that the temp wire was broken at the connector. I jumped the plug and the temp registered normal. It started and ran fine afterward. I have had this happen several times in the past, so looking for it was easy. The oil was contaminated with about 2 quarts of gasoline.
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