2003 E350 6.8 running rough, no warning!
#1
2003 E350 6.8 running rough, no warning!
Hopped in tonight to drive kids all over. Last time out, about a week ago, was running fine, just as it has for the last 135,000 miles. Started it up tonight and and WOW...yuck. Feels like it's a V8. Or maybe a V7?? V6 & 3/4?? It's been really wet this week in East Tx. Guessing maybe that's related. Was raining last time the bus was driven too, come to think of it. Thinking to start with plugs and boots. It's been about 70,000 since last set Not sure how or if I should check coils? Thought about just swapping them, then found out how much they cost. Ended that though right quick like. Here's hoping.
#2
CEL on? Maybe just a bad coil. I just had my plugs all changed in my '04 5.4 E350 after the CEL came on and my code reader said #2 and #7 coils bad. Turns out the coils were fine but the plugs were so bad they were causing the coils to throw a bad reading. I guess 190k miles is a bit much for the original plugs!
#3
Nope. No CEL. Just yucky runnin'. Worst part is I'm running out of working vehicles! '92 Civic tires are so bad there's no way I'll drive it in this rain. F350 has a pulley or bearing going bad, kinda scary to take off in it too. I feel like the belt and ______ (fill in the blank with whatever else) will fall off the motor and leave me high and soggy. And this weather is just not the weather that is good for working on either of the Fords. (Imagine some guy with a socket wrench in a wetsuit and SCUBA gear. ) I did notice that the van's exhaust smelled really funny. Incomplete combustion kinda funny.
Last edited by jtexfisher; 01-09-2013 at 08:39 PM. Reason: added info
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#7
fords tend to be slow to throw a misfire code, so it'll often take awhile to get it to tell you which cylinder is missing.
sounds like you likely have one or more cylinders not firing, so you could try to isolate the problem by unplugging the wires to the coil on one cylinder at a time, taking note of any cylinder that doesn't affect the way the engine runs.
sounds like you likely have one or more cylinders not firing, so you could try to isolate the problem by unplugging the wires to the coil on one cylinder at a time, taking note of any cylinder that doesn't affect the way the engine runs.
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#8
Exactly....twice now I have fried my IDM's and not set a code....biggest thing is eliminating corrosion from all connector contacts and Di-electric grease is your friend ....If it was my truck I would slap a set of MSD COP's on it with new plugs ( E3) and never deal with it again ....Ford is notorious for stupid design concessions , and the electrical /electronics can be bizzare sometimes....
#9
Blaugeurt has good points but I'd disagree with any brand of COP replacement. I swapped out a set of Granatelli's in my '00 E250 5.4 and so far three of them have died. seems they don't like "cold" weather (>38* over night)
Since MotorCraft COP's can now be bought for less than $50 each and they're proven to be among the best available that'd be my recommendation.
Sealing/protecting all other ignition connections is great advice!
Since MotorCraft COP's can now be bought for less than $50 each and they're proven to be among the best available that'd be my recommendation.
Sealing/protecting all other ignition connections is great advice!
#10
#11
It sounds like others have covered the COP issue well enough. I thought I'd take a different tact on it. With all the wet weather, you might also consider your fuel source. Have you put fuel in it during this wet weather? Could the station's supply tank have been contaminated? Or, could your tank? A wet ignition and/or bad COPs as a result of being wet are the obvious conclusions, but if you still have issues, look at your fuel supply (it wouldn't hurt to throw a can of dry gas additive in, just in case). It sounds like your going with a fuel filter, good. When things are dry, do you get a gassy smell around your rig? If so, you could have some tank rust through or a bad gasket on the tank that is allowing water to get in when it gets on top of the tank.
Also, since it sounds like you are just doing plugs and boots, if your coils got wet, bear in mind that some of them could still be bad. If you don't have a scan tool, take it in to one of the chain parts stores and get it scanned.
75% of the job of changing plugs/coils is getting all the stuff out of the way so that you can get to everything. Once you clear a path, the actual plug/coil replacement isn't too bad.
Interesting the mention of WD-40. Most people don't know its history. It was originally developed for the Atlas Rocket program as a water displacement coating. It was the 40th formula that they ended up using...thus the name WD-40!
Also, since it sounds like you are just doing plugs and boots, if your coils got wet, bear in mind that some of them could still be bad. If you don't have a scan tool, take it in to one of the chain parts stores and get it scanned.
75% of the job of changing plugs/coils is getting all the stuff out of the way so that you can get to everything. Once you clear a path, the actual plug/coil replacement isn't too bad.
Interesting the mention of WD-40. Most people don't know its history. It was originally developed for the Atlas Rocket program as a water displacement coating. It was the 40th formula that they ended up using...thus the name WD-40!
#12
#13
Finally finished the fixes. Plugs, boots, fuel filter. Running very well now! I ran these plugs about 75k, two were in pretty sad shape. 2nd bank went much better knowing to get the harness up and out of the way. Only took a couple of hours pretty much goofing around. SOOOO much better than the first go round.
#15
Finally finished the fixes. Plugs, boots, fuel filter. Running very well now! I ran these plugs about 75k, two were in pretty sad shape. 2nd bank went much better knowing to get the harness up and out of the way. Only took a couple of hours pretty much goofing around. SOOOO much better than the first go round.
We can never stress enough the importance of checking/replacing the boots too. Thanks for the update BTW!
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