QuestionQUESTION: Need some help please, I have a 95 sebring that is barely running and wont rev up unless you give it gas very slowly then it will rev to 3000 but still rough. Thinking it may just be a sensor or somthing? is there any thing I can test or do to diagnose this problem.
ANSWER: Hi John,
I assume this is the 2.5L 6 cyl engine. Two things:
Check the egr valve that is located at the passenger end of the engine under the throttle body and next to the thermostat housing. It is mounted horzontally and has a round vacuum-operated piece on the top, a valve body that is connected to the intake manifold, and between the two parts is a flange area with a rod which is the egr valve's stem. It has a slot in it that when you use the tip of a scresdriver you can lift the stem and then let it return to down by means of the internal spring action.
It should move freely but often it gets bound up by crud. So spray some WD-40 on the stem wher it enters the body of the valve and move it some more.
The other thing would be to get a fault code readout using the ignition key,"on-off-on-off-on and leave on" doing that in 5 seconds or less elapsed time. Then watch the 'check engine' light which remains on, to see it begin to flash, pause, flash, etc. Count the number of flashes before each pause. Then repeat the process to be sure of an accurate set of counts. Let me know what you found and we'll go from there using the numbers to get the fault codes that may say what the engine controller has observed to be wrong.
Roland
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QUESTION: egr valve seems to be free, what about the controller for it with vac hoses and wires? also no codes came up just 12 and 55.
AnswerHi John,
I would simply take a look at the egr valve when you have the engine running, watching the slot of the stem, and see if that moves back and forth as you vary the rpm up and down. I would believe that the electrical part of the system would be monitored by the controller and tell us a code if there is one, so it if moves and we don't have the egr fault code and the vacuum hoses all look good then the egr is likely not the cause of your problem.
Unfortunately without a fault code it is difficult to know what to do next. My thought is that you possibly have an inaccurate sensor that is not so far wrong as to set a fault code. That happened to me with a MAP sensor that was off-value but no code was set. The Chrysler tuneup mecnanic at a dealer detected it with the electronic code reader called a DRB II. So you may need to use such a device that actually tells you the moment to moment operating characteristics in the hands of someone who would know what to look for in order to diagnose your situation. I don't have any other ideas than that as to what to do next.
Roland
