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Engine Codes 02 Ram 1500 - 4.7 v8

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  #1  
Old 05-03-2010, 04:19 PM
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Default Engine Codes 02 Ram 1500 - 4.7 v8

Check engine light came on the other day and these are the codes I got. It does run somewhat rough on initial start for about 15 - 30 seconds. Then sounds normal and really smooth.

P0302 Cylinder 2 Misfire Detected
P0442 Evaporative Emission (EVAP) System Small Leak Detected
P0455 Evaporative Emission (EVAP) System Leak Detected

My biggest concern would be the 302 code. What should I start with, change the spark plug on #2 ? Any one else ever get any of these codes?
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  #2  
Old 05-03-2010, 05:29 PM
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Coil. Gas cap possibly for the other two.
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Old 05-04-2010, 08:44 AM
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Agreed with the coil. Try swapping it to another cylinder and see if the code follows. Try cleaning the gas cap and filler tube mating surfaces with WD40 before you buy another cap. That trick fixed mine.
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Old 05-04-2010, 10:48 PM
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Here's what I ended up doing. Disconnected the battery, pulled coil on #2 and swapped with #4. Cleaned up gas cap. Re-connected battery. Unhooking the battery cleared the codes. Started up the engine sounded perfect much better than before. Took a short 5 mile maybe 10 minute drive around town. No codes yet. Guess I'll know for sure on my drive to work tomorrow.

Thanks for the info
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Old 05-07-2010, 10:20 AM
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It's been a couple days probably 60-70 miles on the truck. Check engine light is back. Only P0302 now.
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Old 05-07-2010, 10:35 AM
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hmm so moving the coil didnt take the code with it. the code is still a problem with cyl 2. pull the plugs out of 2 and inspect them. if that doesnt do it, check the plug wires.
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Old 05-07-2010, 12:23 PM
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I agree with pulling the plug on 2, but there's only one plug and no wires.(4.7) Also, check the connector that plugs into the coil. You may have a frayed wire or a wire may have slipped back in the connector not making good contact.
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Old 05-07-2010, 12:37 PM
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why do i always assume everyone has the hemi? lol ugh...
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Old 05-07-2010, 02:12 PM
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Quote:
Originally Posted by AF_HEMI View Post
why do i always assume everyone has the hemi? lol ugh...
If it makes you feel better I wish my truck had a hemi lol Ok I'll try some things tonight. Well probably Sunday depends on the weather. Which is cold and rainy now.
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Old 05-07-2010, 04:20 PM
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SPARK PLUG SPARK PLUG SPARK PLUG! lol. i had the same code (although mine is a 5.9) but it was on cylinder 8. all i did was a quick tune up, oil, wires, filters and SPARK PLUGS! i looked at the spark plug and YUP it was BAD.
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Old 05-19-2010, 02:31 PM
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I wanted to update this. I did replace the spark plug on #2 and found that plug was flat wore out. Checked the gap on it = .085 yeah.... Replacing it seems to have solved the issue for now. I just bought a cheap copper plug to see if that would fix it. Now I'm looking into buying a better quality set of 8 to replace them all sometime in the next week or two.

Thanks for the help and info.
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Old 05-19-2010, 02:36 PM
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Quote:
Originally Posted by LegendRacer6 View Post
I wanted to update this. I did replace the spark plug on #2 and found that plug was flat wore out. Checked the gap on it = .085 yeah.... Replacing it seems to have solved the issue for now. I just bought a cheap copper plug to see if that would fix it. Now I'm looking into buying a better quality set of 8 to replace them all sometime in the next week or two.

Thanks for the help and info.
Don't go super fancy on the plugs, everything I've ever heard says that all of our motors run best with the Champion Copper Cores or NGK's.
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Old 05-19-2010, 02:52 PM
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Originally Posted by Shiloh 24 View Post
Don't go super fancy on the plugs, everything I've ever heard says that all of our motors run best with the Champion Copper Cores or NGK's.
Right. I was reading in the 3rd gen FAQs Spark Plugs thread and it seems OEM replacements maybe the way to go. And that's fine by me
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Old 05-19-2010, 03:47 PM
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Changing one plug mine as well change em all while your at it. That is if it's been 30k miles.

Sorry, was only on the first page haha
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Old 05-28-2010, 04:34 PM
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Anyone know why P302 code and the engine misfiring be such an inconsistent problem. The new sparkplug didn't fix it. Not every day but more often then not when I start it cold you can hear and feel that #2 not firing. It only lasts for a few seconds and then its fine.

Now I have another problem with overheating. The auxiliary fan decided it's not going to work any more. I know it was working recently because you can hear it at idle if it's running. And sitting in line at the race track getting in 90 degree weather the engine temp wouldn't change just stay in the normal range in the middle. Now if I sit idle for more than 15 seconds it creeps to the right hot side... I figured maybe for some reason it's low on coolant and topped it off. That fixed it for a few days but it's back overheating. It honestly sounds like something much much more costly than a spark plug, or coil. I think I'm going to have to park it for a few days unless anyone here has had this happen. Checking/changing the oil today or Sunday will be parked til then. If I find coolant in the oil I'm screwed... and this would probably be the last Dodge I buy

Oh the truck only has 58000miles, 2002, 4.7. I baby this thing daily and the race car and trailer doesn't weigh more than 2000lbs and that's only 20-25, 20-60 mile trips a year. I'm not sure but I wouldn't consider that too heavy of use... Oh well, HELP please
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Last edited by LegendRacer6; 05-28-2010 at 04:37 PM..
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Old 05-28-2010, 05:29 PM
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Quote:
Originally Posted by AF_HEMI View Post
why do i always assume everyone has the hemi? lol ugh...
if they made them with a manual thats not a 2500, i would own a hemi .... to many people gettin lazy these days
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Old 05-29-2010, 09:20 AM
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Hmm, still misfiring and now overheating? Are you losing coolant? These two could be related. Have you done pressure checks (compression and cooling system)? Looks like that might be the next step. You might have the common 4.7 head or gasket problem. Steam from the exhaust would be a dead giveaway on that.
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Old 05-31-2010, 09:18 PM
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Thanks for all the help everyone. I was able to trade in the 02 Ram for something different today. Wasn't burning much but I know the dealer knows it will need head work/gasket. I still have the 93 Dakota, but no more Dodge as the daily driver.

Awesome forum here though, I know my little bro still browses the forum for his 95 Ram 2500. And I'll be back when I decide to replace the brake master cylinder on the Dakota so it has brakes again lol.

Thank you!
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Old 07-23-2010, 09:08 AM
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Default Same Problem

I had the same exact issue with p302 code...replaced coil packs and plugs numerous times with OEM parts. Code still came back. Took it to my local mechanic (since the dealers are worthless). He even couldn't figure it out. He did read on a forum SOMEWHERE that this could be a loose rocker arm on that clynder. I havent had time to check this yet since the truck runs fine! It was just a pain when you have to go for inspection and they keep failing you for emissions!
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Old 07-23-2010, 09:08 AM
 
 
 
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