Chrysler Repair: 1992 Chrysler La Baron Convert V6 Dont Start, vacuum hoses, exhaust gas recirculation

Question
this is more  follow up turn my key ignition on-off-on-off-0n and the code was 1-2-5-5 now i looked this up and told me i have disconnected my battery yes i did cause i went to u pull it and got a good starter and solenoid im getting fuel spark and got good fuel PSI ive tried starting fluid is it some type of sensor or should i changed my cap and rotor i am stumped  oh and i just put in gas cause i thought it was to low maybe  PLEASE HELP

Answer
Hi Gregory,
My first thought is to look over the exhaust gas recirculation (egr) valve and associated control and vacuum hoses. This system is in the pipe that connects the rear (side of the engine next to the firewall) exhaust manifold to the front exhaust manifold and branches off to the intake manifold. The valve is bolted into that pipe and controls the exhaust gas amounts that return to the intake.  The valve has to open and close firmly and quickly or the engine will not operate well due to a mixture of fuel and air that will not allow the engine to accelerate or idle well, if the valve is not where it is supposed to be. Often it will get sticky and fail to close all the way, for example which it has to do at idle and when stepping on the gas toward full open throttle. It is controlled by a vacuum operated and electrical control solenoid mounted near by, and those vacuum hoses should be examined to make sure there is no cracked, leaking, or disconnected hose fittings. There is a vacuum operated round fitting on its top, and also a vacuum line going to an electrically operated valve closer to the engine, nearer the throttle body. Look under the round fitting (which is mounted on a saddle with openings for access to view) on the top of the valve where you will see a rod with a slot in it which is the valve stem. Take a straight blade screwdriver, insert it in the slot, and then use the driver to lever the valve up (against spring pressure) and let it return to see if it is dropping back all the way down due to spring's action and closing positively to a firm closed position. Spray WD-40 or other penetrating lubricant on the valve stem to loosen it up in that in and out motion. Check to make sure the vacuum lines are all attached and not cracked. Then warm up the engine and observe the slot to see if it goes up when you rev the engine to 2500 rpm and then drops back down fully, closing the valve, when you let the engine go back to idle rpm. Make sure that the fully down position is really down because if it is not fully closing when you let go of the accelerator and coast that will cause the engine to stall. It may be that to get it to close you'll have to unbolt it and clean out the gas flow passage past the valve, due to buildup of exhaust fumes in the valve as sticky crud deposit around the internal valve.
Let me know if that doesn't help and we'll consider some other possibilities. But the egr function can be a big detriment if it isn't in the correct position for the conditions that are needed for a good mixture.

Roland