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Re: TEMPUTURE SENSOR BLEW OUT
I worked for a Ford dealer for 20 years, it is not a common problem, but it does happen, the recall was for coolant leaks at the molding seams of the manifold, I did almost all the manifolds that came through the door on the Mercure and Ford models that used a 4.6L V8. Your manifold can be repaired.
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2001 crown vic, code # po1401. this code has to do with the egr system, the first thing is to check the dpf sensor, this sensor tells computer that the egr valve is working, there are two hoses the run off sensor and go into exhaust lines, check the hoses ,make sure they are on and not split, if hoses are good then start by replacing that sensor. here is a pic of it.and also the hoses
The PCM is programed for the LS engine parameters and now that you have changed engines the signal from the new engine are out of parameters> Either see if you can get the PCM reprogrammed at a dealership or purchase a new PCM and program the chip with the police engine interceptor to the vehicle> you may also return to the place where you got the engine and purchase the PCM for the police vehicle.
Notorious for intake leaks, the composite plastic intakes crack and leak coolant-as to the lack of power, you mght have overheated it and done some damage to the engine. There was a recall (information below) for the 4.6 for the intake-the overheating and lack of power means you should at least have compression checked and go from there-you may have bad head gaskets or worse. Do a compression test before you do anything else.
Ford Motor Company will extend the recall (01M02) on
4.6L V8 equipped vehicles with plastic intake manifolds. Some of the
composite intake manifolds used on 4.6L SOHC engines may develop fatigue
cracks at the coolant crossover duct. This condition could result in
engine coolant leakage which, if not serviced, may cause engine
overheating. Complete loss of coolant may result in engine damage or
The updated recall now includes: • Certain 1996
through 2001 Model Year Crown Victoria Police Interceptor • Certain
1998 through 2001 Model Year Crown Victoria with Taxi • Certain 1998
through 2001 Lincoln Town Car Limousine and Livery Prep Package •
Certain 1996-2001 Crown Victoria Taxis, Police cars and Lincoln Town Car
Limousine and Livery cars.
• Certain 1996 through 1997 Crown Victoria Police
Interceptor Vehicles with 4.6L SOHC engines built at the St. Thomas
Assembly Plant from the beginning of production for the 1996 Model Year
through January 28, 1997. • Certain 1998 through 2001 Crown Victoria
Police Interceptor Vehicles with 4.6L SOHC engines built at the St. Thomas
Assembly Plant from November 22, 1997 through December 15, 2000. •
Certain 1998 through 2001 Crown Victoria Taxi Vehicles with 4.6L SOHC
engines built at the St. Thomas Assembly Plant from November 22, 1997
through December 15, 2000. • Certain 1998 through 2001 Lincoln Town Car
Limousine Prep Package and Livery Vehicles with 4.6L SOHC engines built at
the Wixom Assembly Plant from November 22, 1997 through December 15,
It is highly unlikely that the sensor is bad. What the most common cause of DPFE codes is a blocked EGR passage in the intake manifold. The car is 15 years old and over that time has accumulated carbon build-up in the passage. The passage is located in the intake manifold beneath the air-intake casting.
first cylinder 4 is the last on the passenger side . first pull the coil out and check if there is water where the plug is. if there is take the water out and dry up the coil. if you find water you got a crack manifold or a bad intake manifold gasket. if there is no water replace the coil. good luck
I just came up with that exact issue in my 2003 with 98K police crown vic. And the last time I had this issue in a 2001 police Crown vic it was the crank shaft position sensor. A $20 part and about 30 mins to put it in. located near the bottom of the engine. I had to un bolt the A/C compressor and push it out of the way a few inches to get to the sensor. If you have about 100K mile on it and its an idled heavy police car, this sensor should be changed out anyway. It can leave you on the road dead and some dealers have a hard time find out whats wrong as the OBD 2 does not see it as a problem when it goes bad or becomes touchy as I think mine is.
I would suggest u use a machine shop for a more trustworthy fix. if the manifold was metal JB weld would work great, but an insert would be better and less likely to fail. As far as the failure goes it was most likely overtightened at the factory, it causes a small crack, expansion and contraction under pressure worked on that all these years, i am not a big fan of thermal plastic anything, 30 years of new car dealer wrenching experience tells me this.