2003 3.5L Intrepid ES, Shuddering idles, error codes galore (6 of them, including misfires)?

Question

I have a 2003 3.5L ES. I love the car, but it's been parked and rarely driven for the last year and a half. It's probably been driven less than 50 miles in that time. We've moved and now my wife and I need to drive separately, so I'm driving my car regularly again. Today, my car started and then died in the driveway with a flashing CEL. Error codes: P0300 & P0302. Engine misfire, cyl 2 supposedly. I'll check it out more when I get home from work. But I have also had 4 other error codes for awhile. Here are all of my codes and descriptions I've found online, does the combination make anyone think of anything specific?

P0300 - Multiple cylinder misfire
P0302 - Cyclinder 2 misfire (which one is 2?)
P0456 - Evap small leak
P0440 - Evap system malfunction
P0582 - Speed control Vacuum solenoid (my cruise doesn't work)
P0586 - Speed control vent circuit

Reading about my misfires and possible solutions, I've found vacuum leaks mentioned, is it possible that all 3 of these (evap system, speed control system, misfires) are related through leaky hoses? 

Acouple more things:
1. When the heat is on, I can smell a little bit of exhaust inside of the car
2. I have discovered a small transmission leak. Overnight, I will lose a little fluid up under the hood. I'll find 2 spots on the ground, one on the driver side and the other on the passenger side. The driver seems to drip a little more, I'm assuming the fluid is dripping onto something and travelling out until it drips.

Any help or direction would be much appreciated. Thanks!

leftuncheckd · Accepted Answer

Evap system is gas tank fume build up. There is a black or gray plastic canister usually attached to the firewall. It has a hose coming from the gas tank and another shorter hose coming off of it. I've driven with a bad evap canister for 70,000 miles now with no effect on the engine.

Your problem is more than likely spark plug related. Maybe in need of new plugs and/or wires and you should inspect the distributor for cracks. Also there is an idle control screw usually located by the throttle body next to the injector, might need adjustment.

As for the leak, once you find them, you can apply some Permatex RTV silicone sealant over the leaks. That will take care of them for as long as necessary.

Anonymous · Answer

a nasty plug or a nasty twine. a situation with the digital distributor (computer). between the cylinders isn't getting the pastime performed. start up with wires and plugs. that is low fee and desires periodic exchange besides. A notice to the different solutions.... No, a ninety 9 lexus would not use a distributor cap, it has digital spark distribution (duh). And Exhaust gas regulation (valve) has not something to do with a misfire code so as that's a purple herring too.

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2003 3.5L Intrepid ES, Shuddering idles, error codes galore (6 of them, including misfires)?

2 Answers