OutdoorJack

Awesome!! Can't wait to see how your meticulous auto enthusiasm translates into "rough and tough". The s4 looks pretty smooth... I bet the PF will turn out great. Good luck!

Hey!! Where did they go!? Both links NOT WORKING!!!

STOP. I mean it. I want you to listen very carefully. Don't do anything else—don't buy ANYTHING ELSE—until you complete your tune up! You are wasting precious time doing detective work with data that can't possibly be considered until you complete a basic tune up. Plugs and wires alone may solve EVERYTHING you have mentioned. Besides, you have a sweet child and she deserves every spare moment her papa can find! Don't waste precious moments theorizing about "problems" that are unlikely to exist. (Or at least you can't know if they exist yet.) You're CATs are probably fine, but if you keep dumping unburned fuel from misfires in them, they WILL burn up. (Melt together) Also the case for the O2 sensors which are sensitive to excessive heat and carbon buildup. Guess what happens with each misfire you drive on... Yep, unburned fuel travels into your exhaust pipe sticks to the HOT O2 sensor and burns, making everything hotter and leaving behind carbon buildup—caking occurs and the sensors no longer function. This can also cause your exhaust manifold to crack. These things might be bad already, yes, but none of them are likely to cause a misfire... They are cause BY misfires. Lean mixture included... Computer leans out the mixture when too much unburned gas flows into the exhaust... Maybe. If these things aren't bad yet, they soon will be if you keep driving!! For heavens sake, fix the misfires. Plugs and wires!!! (If injected, misfires can be injectors too. But typically they aren't intermittent or random where a faulty injector is involved.) Mechanically speaking you're acting a little out of order. And I say this with the love of a brother who would help you do the tune-up if I were there, I hope you know this. I remember getting into mechanics and being excited and confused by everything that could potentially be wrong. And intoxicated by the $$$$ I can save!! That was 16 years ago. Done properly, it can save you better than 50%, even with buying tools... Done poorly and it can, and WILL cost you dearly. Follow the advice of fellow mechanics on here and TUNE UP YOUR TRUCK TODAY. Shop classes begin with shop safety, then move on to the first lesson. The Basic Tune-up. It's first because it's the foremost important task to do on any car when you begin trouble-shooting. You have to eliminate the variables one at a time to isolate the problem and this is the easiest way to eliminate the most likely culprits for everything you are describing. Parts should cost no more than $60-$100 in total. This includes: 1. Spark plugs—get the basic ones, Nobody needs iridium...PERIOD. There's an extra $15 for a sneak out daddy daughter date. 2. Ignition wires (The kit includes coil to distributor wire, and distributor to spark plug wires.) Only buy the basic ones. Two more outings with the little one paid for... Dinner and a movie? 3. Distributor Cap & rotor 4. Air filter—again get the basic one. Save if $7 or $8. Enough for a back to school gift perhaps? Maybe a small bouquet flowers on the first day of school...oh, she'd MELT. 5. Fuel Filter Note: Verify timing—if things are still screwy after a tune up. Your engine needs fuel, air and reliable spark. You've done a lot of great detective work, and it's fun to see your excitement. Now eliminate the most probable cause before moving to the next one. I'll be VERY surprised if ALL of your codes don't disappear and gas mileage return to normal with a basic tune up. Though you might have wrecked an O2 sensor by now, and hopefully not a CAT... If not the codes will automatically clear with 3-5 drive cycles. No OBD-II scanner needed. If you haven't done so already, buy the parts TODAY, before you close this browser window, or app. IMPORTANT!! I believe your engine is an interference engine, which means the valves are synchronized perfectly to open only when the pistons are out of the way. If the timing belt brakes, all of your pistons smash into your valves—wrecking pretty much everything important in the center of your engine. Simply put, your engine self destructs in less time than it takes a human to blink. It's not pretty: These are from a PT Cruizer, posted to a Dodge Dart forum by a friend. Unless you have $1600-$3800 laying around for an engine swap. Inspect/Change that timing belt immediately!! If you don't know how... Pay someone to do it. Like, tomorrow, before you drive it again. Haha. Please let us know how the tune-up goes! And don't bother posting another update until you do it. Feel free to ask any questions about a tune-up if it's your first time. E.g. Where to put the dielectric grease. How to start a spark plugs in straight so you don't wreck threads in your engine. Etc. There is wealth of knowledge in this forum! Best of luck.