Cold start misfire on a 4.7L. Seems to come in pairs - 1&2, 4&5, 3&7. Coils (on plug) have been swapped with no immediate effect. Both heads have been off, disassembled and thoroughly cleaned. Bank 1 head replaced with new valves, springs, camshaft, and 2 lifters and rockers. MAP at start hovers around 16 but is 22 after it has cleared up which usually takes 30 seconds or so but could last up to 5 minutes. Tested MAP sensor and found it to be accurate. Compression is erratic but usually around 130. Spec is 100 but normal is more like 170. No fluid mixture. No combustion in coolant. No excessive blow by. Plugs don't get fouled but injector pulse width is dramatically increased on affected cylinders while condition is present. TPS, ECT, IAT, and BARO sensors all read accurately. Fuel pump replaced in the middle of all this for unrelated issue. Timing chain alignment, condition and tension have all been verified to be correct. No cylinder pressure leakdown at all. EGR valve replaced. The head that was replaced spit an intake rocker out one time (also in the middle of all this). It had not been touched previously. PCM is up to date. Piston tops looked normal, not especially clean or carboned up. I don't know what else to check.

SOURCE: 2001 sebring will turn over but will not start

Most Chrysler cars do have an anti-theft system that can cut out the engine.

I would call the service department, with your VIN handy, and see if yours was equipped with one, and what you need to reset it.

If that isn't the problem, your EGR valve might be bad, or the sensor for it. I've seen a lot of cars where if either the valve itself, or the sensor are malfunctioning, the car won't run properly.

I would also check your MAF and IAC, as those can cause the car to not run.

If you can, get an OBDII code scanner, and pull the codes from your car, they might give you a more specific place to look. (Most parts stores will let you take one home, you put a deposit down, and get it back when you bringthe scanner back to them)

Dan Connors

• 119 Answers
• Posted on Dec 05, 2009

SOURCE: 0301 misfire. Replaced spark plugs

take compression test

SOURCE: P0344-Camshaft Position Sensor A Circuit

I can sympathize with you here because I am goin through the same thing. I'm not sure how much help I will be but I can tell you some of the things I have tried. I have replaced 1 of 4 of my oxygen sensors, camshaft sensor, mass air flow sensor, plugs, wires, dist. cap, fuel filter, air filter and had my catalytic converter cleaned out but not replaced. I have been trying to find out more info to see if a reflash of the computer will do anything. I was going about 95 when my light came on. It could very well be the computer itself. I would like to know if you get this figured out so you could tell me what it was. Please email me at [email protected] if you do. I will find this message if I get mine figured out so I can let you know. I've takin it to 3 different mechanics. The 3rd one was a Chevy dealership garage and even after hooking it up to their computer they said they still didnt know what the problem was but felt it was a fuel issue. I'm taking it to one more mechanic before I see if the dealership will reflash the computer or I might try and match one at a junk yard. There is a site that does it but I think its about 2 weeks waiting time. From what I've read so far the numbers on the computer have to match up so it keeps the correct firing order etc. Ive had 40,000 misfires on cyl 6 and 20,000 on cyl 4. Everything that could have been the cause I think I have replaced. Pretty much the only thing left is the computer. Sorry I didnt have a solid solution but I promise I will let you know when/if I get mine fixed.