QuestionI have a 95 Chrysler Comcorde 3.5l that won't start.I have pulled codes and have gotten 12,41,23,24,33,52,55.I engine is flooding I have pulled the plugs and they are all wet.Already tried the TPS and Map sensor still same result. Any ideas would be helpful thxs.
AnswerHi Travis,
Have you checked to be sure that you have spark?
I would follow-up on the intake air temp sensor (code 23) which is located in the 'middle' of the intake manifold tubes. I believe it should read in the range of 10-14,000 ohms when cold, and then drop down to 700-1000 ohms at 200F. Check that its wires aren't shorted/melted.
The 52 oxygen sensor code shouldn't affect starting as that doesn't come into play until you have the engine warmed up. The 12, 33, and 41 codes are not relevant to the no start as you probably know.
I would definitely check the egr valve which is located behind the engine near the air intake throttle valve. It is mounted in a pipe that runs between passenger side exhaust manifold and the air intake manifold. The valve is mounted horizontally and has a valve stem between its round vacuum actuator top and the body of the valve attached to the pipe, inside the flange that connects the two parts. The stem has a slot into which you can insert the tip of a flat-bladed screwdriver so as to lever the stem back and forth against spring action which should move freely and close tightly. If the stem seems to be sticky so that stem doesn't close all the way by spring action, then you can try spraying some penetrating solvent like WD-40 on the valve stem to freeup its motion.
If the valve is sticking slightly ajar it will make for a rough idle and poor starting such as you describe because the mixture is too dilute. It is one of the most common causes of this symptom. So see if you can find the valve and check/lubricate the stem. To check it in motion you can rev the engine from idle to 2500 rpm and back to idle and watch to see if the valve stem moves freely in both directions to the extreme open and closed positions. It may be that the interior of the valve is cruddy so that might require that it be unbolted from the pipe where it it attached and cleaned. But chances are good it will only be a sticky stem.
Finally, recount the flashes to be sure you have the correct code numbers.
Please let me know what you learn.
Roland
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