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I have a 06 ranger 4.0l I recently pulled the engine and replaced the timing sets (old ones the chain guides came apart) after I I reassembled the engine and buttoned it back up it started right up first turn but the I noticed it was idling around 2000 rpms and that lasted about 30 seconds before returning to normal idle , when you tap the accelerator it holds at 2000 rpms for about 15 seconds before returning to normal sense first start up it continues to get hard to start now to start it, it has to be wide open throttle and takes two or three minutes but one it fires up and idles down it's smooth idling but you can smell it flooding out and I'm getting a p2198 & p2196 being that it running rich on both banks and it ran fine before I'm shying away from fuel injectors I check the pcv valve it's fuctioning properly any isight to what may be causing this oh I also cleaned the throttle body and retorqued the intake manifold to ruled them out
Yes, you have unwanted fuel flowing into the engine
At the end of the fuel rail on the engine is the Pulse Damper, it has a vacuum line attached, check that vacuum line for gasoline
The Pulse Damper is a rubber diaphragm that absorbs pressure waves created by the injectors opening and closing when running 50+ PSI fuel pressure
The vacuum hose on it is a safety system, in case diaphragm should leak fuel wouldn't drip down on hot engine parts
But if it leaks raw fuel would be sucked into the engine via that vacuum hose
You are preforming the Clear Flooded Engine routine correctly
WOT(wide open throttle) gas pedal position just before cranking the engine causes computer to turn OFF fuel injector pulses, thus drying out a flooded engine, this routine is in all fuel injection computers.
When you release gas pedal computer restarts injector pulses
You can use this routine to your advantage to find out where fuel is coming from, if its not the Pulse Damper
Disable spark, unplug coil packs 4 wire connector
Use Clear Flooded engine routine, i.e. press gas pedal to the floor and hold it down all the way
Crank engine that way 2 times
Now pull out the spark plugs
Look for wet tips
Wet tip means that injector is leaking fuel
All fuel injectors get 12volts with key on
Computer Grounds each injector to open it
This means if there is a short to ground on one of these 6 injector wires then that injector will open with key on
Would you happen to know where exactly on the fuel rail the vacuum is located I can't seem to find it. Coming from the fuel supply line it ties in on the front of the driver side rail at the front and it cuts across to the passenger side front of fuel rail and has a ninety into the passenger fuel rail the on the back the driver side has just a flat cover plate then on the back of the passenger side it has a what looks like a small shrader valve with a cap on it I'm have truble locating it and the fuel regulator
done a little research and found this diagram on the fuel damper
but unfortunately upon looking under the hood this is the back of driver fuel rail it is just a flat cover plate with a nipple sticking out of the center but does not have any hole or port in it sorry it was hard to get a pic so it might be hard to make out driver back side of fuel rail passenger side back of fuel rail
would the damper and vacuum line possibly be in a different location on mine?
Your 2006 4.0l may not have one, can say for sure, lastest part number I found only went to 2005 Ranger
And they were "stupid expensive" for OEM, lol, like this: https://www.ebay.com/itm/FORD-OEM-Fu...-/273511719137
I took a second look at it and it doesn't have the damper on the fuel rail is there something else I should look for would this eliminate the damer and fuel regulator as the problem I can't find any where on my fuel rails where anything goes to the pressure regulator or the pressure regulator itself for that matter
1998 and up Ranger have pressure regulator(FPR) on the fuel tank
FPR on the rail was 1997 and older running 30psi pressure, FPR used the Return fuel line to release pressure
1998 and up just have the one fuel line to the engine bay, so can't use an FPR on the rail
