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Sounds as if there is one or more cylinders misfiring. Possible defective ignition coil/spark plug/s/ or ignition wires. IS the vehicle blowing black smoke out the tail pipe? If so, another possibility could be an over fuel situation caused by a defective sensor or leaking fuel pressure regulator. My guess would be a mis fire causing the engine to not fire on all cylinders
check the color of your spark if it is blue your good if orange replace coil dependig on your setup and if you have 1 coild or 8 coils you many have to check each cylinder seperate just pull out spark plug replace the spark plug wire have someone try to start car and lood at color of spark i should note dont hold the wire just let it rest close by
if that is ok replace your crankshaft postion sensor as it tells the cars ecu when and to what cylinder to fire spark to faulty crankshaft postion sensors 99 percent of the time wont allow car to start or very hard starts the other 1 percent
Hello, my engine light was on for a VERY LONG time and everytime I got it checked no one could tell me what the problem was because things always checked out fine. The "code" says its a loose gas cap or something, but it wasnt that. My 300M also was having A HARD TIME STARTING UP for about 8 months and leaking coolant for about a month. I finally found a mechanic who knew what he was doing; 1. Leaking Radiator 2. Coolant found in #2 or #3 cylinder. The cause of this was a busted HEAD GASKET. If your 300M has trouble starting and the Engine light stays on have a mechanic check your engine for a busted head gasket and see if all your cylinders are firing correctly. I had to pay $2600 for a new Head Gasket, Radiator and all new hoses plus labor. CRYING!!!!!!!!!!
I have a 2001 300M 130K - very well kept. Stuff happens...
I would start with the cylinder 4 spark plug and make sure it look good and is firing correctly. After that I would look either at the final coil, ignition module and then o2 sensor. These problems are so hard to diagnose and are trial and error so much of the time.
A BLINKING ENGINE LIGHT INDICATES AN ENGINE CYLINDER IS MIS-FIRING. HAVE THE TROUBLE CODES TESTED TO DETERMINE WHICH ONE. DO NOT DRIVE THIS WAY AT HIGH SPEEDS AS IT MAY OVERHEAT THE EXHAUST SYSTEM AND CREATE A FIRE HAZARD.
I could very well be the TPS throttle position sensor acting up. I had a very similar situation on a 99 Concorde with the same engine in it in my shop today. Go to a shop that is able to do a data stream on the engine. What it is, is they hook up a scanner and have the ability to watch all the sensors as the car starts/runs.