My 2003 crown victoria p71 pings on accelleration. 2 weeks ago, the entire egr system was cleaned professionally - twice, still pings. Last week a professional Crown Victoria mechanic (works for a police dept) replaced MAF sensor, still pings. New plugs and boots last month. EGR and MAF readings on his computer (mobile device which reads at various speeds - he rode along with me and took readings) read within proper specs at all speeds. I am using regular grade 87 octane fuel, which is what the cops all use. 114K on car. Any suggestions?

idler pully

Firing Order 1-3-7-2-6-5-4-8 Bank 1 on the right Bank 2 on the left Cylinder #1 on the right Cylinder #8 on the left last one ,which is the driver side

Dirty fuel system combined with a dead fan clutch?

I would take it out right away, you don't want to be charged for impersonating a police officer. There is no reason to keep it and if you do you will have to answer why every time you turn around and get stopped.

i have a 99 crown vic suvillan and i cant find the ambient air temp sensor where is it please help

let me guess....... you are using regular 87 octane gas ? run it down to almost empty and fill it with super and see it it works you probably have about 100,000 miles on it the camshaft, lifters and valve springs, timing chain are all worn

there are 5+ pages of fuses what specifically do you need

have your battery check first.ive never seen a battery that will last for 5 years.shelf life starts as soon as the acid is added to the battery.

I HAVE HAD THE SAME PROBLEM ON SEVERAL CROWN VICS I HAVE WORKED ON ,& SOME OF THEM A SET OF PLUGS STOPPED IT,AND SOME OF THEM HAD TO HAVE 1 OR MORE COIL PACKS REPLACED, BUT THE PROBLEM THAT I FOUND THAT IF PLUGS & ALL COIL PACKS HAD BEEN REPLACED,AND IT WAS STILL IN THE IGNITION, IS THE WIRES GOING INTO THE PLUG ON THE COILPACK UNDER THE INTAKE TUBE, IF YOU REMOVE THE INTAKE TUBE,LOOK CLOSE AT THE WIRES FOR ANY BARE SPOTS,& LOOK AT THE BOTTOM OF THE INTAKR TUBE IF YOU CAN SEE WHERE IT HAS RUBBED IT,IT IS ALMOST A GIVEN THERE IS A BARE SPOT OR CRACKED INSOLATION ON THE WIRE, ENOUGH TO CAUSE A MISFIRE, (FYI) IT TOOK ME MANY TIMES OF INSPECTING BEFORE I LOOKED CLOSE ENOUGH TO SEE THE BARE SPOTS, BUT ALL YOU HAVE TO DO IS STRIP THE HARD PLASTIC AROUND THE WIRES BACK ENOUGH TILL YOU SEE GOOD CLEAN LOOKING WIRE,THEN SEPERATE THE WIRES AND IF YOU HAVE LIQUID ELECTICAL TAPE USE THAT AND THEN TAPE THEM WITH ROLL ELECTRICAL TAPE ,BUT IF YOU TAPE THEM UP GOOD SO WHEN THE WIRE IS BENT ENOUGH FOR THE INTAKE TUBE TO CLEAR ,& YOU CANNOT SEE THE WIRES GOING IN TO THE PLUG WITH A ROLL OF ELECTRICAL TAPE THAT WILL WORK TOO, I HOPE THIS TRICK WILL WORK AS GOOD FOR YOU AS HAS ME ON DOZENS OF CROWN VICS, ESPECIALLY P71 POLICE CARS.

It is located in the rear under the fuel tank.You will see a black plastic cover over it.