Question about 2007 Jeep Grand Cherokee Overland
Since this was new the engine stalls under accelerarion periodically. I slow down for a yield sign or traffic and upon pressing the throttle the engine will drop to 300 rpm. I let off the throttle and it will pick up. The dealer has checked it numerous times and can't find the problem. The ambient and engine temp make no difference, up or down hill no diff, fuel level no diff, the filter has been replaced.
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Posted on Jan 02, 2017
Here are my theories
Idle Air Control valve (IAC) - allows a small amount of air to pass though throttle body at idle since the butterfly in the throttle body is closed at this time - if this doesn't open the vehicle will stall
Air Intake Temp Sensor - Helps correct air fuel ratio by measuring the temp of the air coming through the intake
Oxygen Sensor - Largest determinate of air/fuel ratio after the vehicle almost reaches operating temp which is approx 160 degrees
Coolant temp sensor - Largest determinate of the air/fuel ratio from cold up to the point when the oxygen sensor takes over
EGR Valve - 5.2 Liters are known for these failing, they redirect a small amount of exhaust gases back into the intake manifold for re-burning (emissions thing). Sometimes they get stuck closed and allow for too much exhaust gas back into the manifold. But usually this would cause very poor performance as well as shuddering and stalling
Use what you know about your condition and what these common fail items are and see if any of them sound like the problem
Posted on Aug 25, 2008
how are the spark plugs?
would start with those.
the fuel filter is usually located under the hood by the intake manifold and attached to the firewall of the car. the pump is located right by the fuel tank and if you cant see it then its inside the fuel tank. (you will have to lower the fuel tank down to get to the pump.)
Posted on Aug 14, 2009
I had the same issue with my 4.0, I went through all the same BS you did and in the end it was a faulty fuel pump. Pricy i know but im sure thats your problem
Posted on Nov 15, 2009
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