Question about Cars & Trucks
P0340 and DTC 12 Replaced CMP same result. tugs at around 2000 rpm steady on accelerator pedal- total loss of power. -Suspected Crankshaft seal leak due to oil seaping to CMP sensor. -Parts source has no PCM replacement= free ratchet!! -Fuel rail has no test port What could cause this and how do I test the fuel pressure. Thanks for the help!
When you start the car does it turn on right away or does it turn over slowly, gets faster and then finally fires up? That's a sign for low fuel pressure. If it turns over normally and always fine I would suspect that your fuel system is okay. Also low fuel pressure would be caused by a faulty fuel pump. If the car is leaking oil, you should get that fixed asap, it should be on top of your list. You can fix the sensor after you fixed your engine. Because leaking engines can kill themselves pretty fast, which would be more trouble to fix than faulty sensors.
Posted on May 04, 2013
Testimonial: "Depends on the day, Sometimes fires up after battery is removed or code deleted. Not sure if dodge is leaking oil due to installing-Removing Sensor but found trace oil in CMP area... Having trouble finding fuel rail Test port to determine pressure issue- as per Haynes. Seeing as this vehicle is 3 or 4th hand, could the previous owner have dialed in timming to Premium setting thus causing Timming issue? Grounds have been messed with forsure, I twisted them back together and taped LOL... waiting for paycheck..*HeavySigh*"
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Posted on Jan 02, 2017
could be a bad earth or [ground]
the power wire ma be brocken or have a loose or dirty connection
you neeed to trace it along its lenght to determine the fault!
so start at the pump & work back
Posted on Jul 20, 2009
SOURCE: vehicle came in for check
A misfire at idle that smooths out at cruise is ALMOST ALWAYS caused by a vacuum leak. Take a hard look at your fuel trims at idle. If the Bank 2 Long Term Fuel Trim is more than + a couple points higher than the Bank 1 trim, your problem is most likely a vacuum leak. If the Fuel Trims even-out while holding the engine at 2000 RPM for about 20 seconds, then a vacuum leak is DEFINITELY your problem. I would suspect a leaking lower intake gasket leak because an upper plenum leak will normally affect all cylinders.
Posted on Jan 30, 2011
Yes the oil can cause the car to lose spark, the oil leak could be caused by the valve cover gaskets around the spark openings, but 9 times out of 10 it is the spark plug tube "O" rings. The top of the valve train comes off of the head, the "O" rings are between the two halves, that will fix the oil leak.
Posted on Apr 22, 2009
try this, the next time it quits leave the key in on position and get a broom stick and go to the passenger side of the car. About straight in at the back of the door ,reach under with the broom stick and tap the plastic gas tank a few times, have someone try to start it or go start it yourself. Mine did this even after the garage checked it out and cleaned the tank. Come to find out dirt settles around the fuel pump and clogs it. They just blame the pump but in my case the pump was fine. I was told Alero used a very small fine mesh in the sock that goes in the fuel pump and they clog up. But most of the dirt was around the plastic guard around the fuel pump. See if this works and let us know. Good luck
Posted on Apr 07, 2009
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Release the throttle when fuel cut-off occurs.
Observe the fuel cut-off specifications for the applicable engine.
The engine should not accelerate beyond the calibrated RPM value.
Release the throttle immediately if the value is exceeded.
Block the drive wheels.
Set the parking brake.
DO NOT apply the brake pedal.
Cycle the ignition from OFF to ON.
Apply and hold the brake pedal.
Start and idle the engine.
Turn the A/C OFF.
The vehicle must remain in Park or Neutral.
The scan tool monitors certain component signals to determine if all the conditions are met to continue with the procedure. The scan tool only displays the condition that inhibits the procedure. The scan tool monitors the following components:
Crankshaft position (CKP) sensors activity--If there is a CKP sensor condition, refer to the applicable DTC.
Camshaft position (CMP) signal activity--If there is a CMP signal condition, refer to the applicable DTC.
Engine coolant temperature (ECT)--If the engine coolant temperature is not warm enough, idle the engine until the engine coolant temperature reaches the correct temperature.
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