Question about 2011 Jeep Compass
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Posted on Jan 02, 2017
I am going to assume that it will not run even if you push on the accelerator pedal?
Can you install or attach an old timing light to the spark plug wires, turn it one and try to start it. The light should flash with the engine running, but if it shuts off at time of engine die, and the engine is still spinning, you are losing spark, My suggestion is the cranks shaft sensor on bell housing.
Second, install a pressure gage on the test port on the fuel rail and watch it as you start the engine, fuel pressure should not drop as the engine dies, if it does, the pump is not working correctly. There are two modes of power to that pump, one to start and timed, for only a few seconds to prime the system, and one to run continuously. Find the wires going to the pump at the tank. Connect test light to those wires and watch what happens during crank and at stall, You should not have the pump shut off and the engine dies.
If you have spark, and fuel pump working, when did you last change the filter,,but I put that LAST.
It has to be one or the other of these.
Posted on Aug 04, 2008
Had the same problem, what worked for me was changing the crankshaft position. Here are a couple other suggestions, camshaft position sensor, fuel pump, clogged fuel injectors, fuel filter...... Good Luck
Posted on Aug 04, 2008
That code PO455 is indicating that you have a fuel vapor leak somewhere in the system. I'd check from purge canister back taking a close look at all the vapor hose to the tank. If all that check out, purge solenoid & canister would be my next area to check. That's probably what your smelling , so it might be easier than you think to sniff out the source.
Posted on May 18, 2009
After you crank it for a while, take out one of the spark plugs. If it is dry then you have a fuel issue. If it is wet and smells like gas you have a spark issue. Find that out and report back and then we can get more specific.
Posted on Dec 19, 2009
Your dealership can read the codes entered into your car's computer every time it malfunctions. Same problem as yours, however, also gets worse, back up lights won't work, sticks in park (in the gas stationing) (very embarrassing), will only run with foot on gas, etc. It was the "neutral safety switch". $500 fix but runs and starts perfectly all the time.
Posted on Jan 15, 2010
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