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#21
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Yep, I suppose the ECM is flashed to misfire at 30k just to remind you to
change the plugs. "L.W. ("ßill") Hughes III" > wrote in message ... > I surly have, this was the fastest V6 Jeep in Glamis, '77: > http://www.billhughes.com/jeep68sand2.jpg It was using your same twenty > five thousand volts to fire the plugs. Seeing you haven't felt yours, I > don't believe you can feel it miss fire, to your untrained eye it would > probably feel like the new Hemi WJ switching between four and eight > cylinders. And if you kept a log, you would notice a decrease in > mileage. > God Bless America, ßill O|||||||O > http://www.billhughes.com/ > > Matt Macchiarolo wrote: >> >> Bill, have you ever even felt a 6-cyl engine misfire? If you had, you >> would >> know that mine is not. |
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#22
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No decrease in gas mileage, and yes, I will change them soon. If you want, I
can fly you up here and you can change them for me...it's been unseasonably warm here last few days...today we nearly got up to 30F. Thursday it was 6F. :-) "L.W. ("ßill") Hughes III" > wrote in message ... > I surly have, this was the fastest V6 Jeep in Glamis, '77: > http://www.billhughes.com/jeep68sand2.jpg It was using your same twenty > five thousand volts to fire the plugs. Seeing you haven't felt yours, I > don't believe you can feel it miss fire, to your untrained eye it would > probably feel like the new Hemi WJ switching between four and eight > cylinders. And if you kept a log, you would notice a decrease in > mileage. > God Bless America, ßill O|||||||O > http://www.billhughes.com/ > > Matt Macchiarolo wrote: >> >> Bill, have you ever even felt a 6-cyl engine misfire? If you had, you >> would >> know that mine is not. |
#23
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I would, but I feel a need to go to the beach tomorrow:
http://www.camzone.com/index.php?cam=delmar It's my turn to do leg inspections. God Bless America, ßill O|||||||O http://www.billhughes.com/ Matt Macchiarolo wrote: > > No decrease in gas mileage, and yes, I will change them soon. If you want, I > can fly you up here and you can change them for me...it's been unseasonably > warm here last few days...today we nearly got up to 30F. Thursday it was 6F. > :-) |
#24
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I felt mine misfire. It's like riding a bucking bronco. :-) At first I
thought the torque converter was on steroids because it would only occur during overdrive at minimum speed, like 45-50 mph going up a freeway entrance ramp. It was a TSB item over a year ago.. fixed now.... hmmm... on second thought I will have the plugs changed at 30,000 miles. I had carbon build-up from short drives to work in cold weather. 0900303 - 4.0L MULTIPLE CYLINDER MISFIRE Date: 08/01/03 Model Year(s): 1999-2004 Description: NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 4.0L ENGINE. This bulletin involves inspection of all engine exhaust valves and a decarbonizing procedure if necessary. Details: The customer may experience an incident of engine misfire during certain vehicle operating conditions. The misfire may occur when the vehicle is operated between 50 - 70 MPH and under light loading conditions, e.g. slight uphill road grades. This condition may occur at all ambient conditions, but is more noticeable when ambient conditions are less than 0 C (32 F). If the vehicle is equipped with On-Board Diagnostic (OBD), a MIL illumination may also have occurred due to Diagnostic Trouble Code (DTC) P0300 - Multiple Cylinder Misfire. Various single cylinder misfire DTC’s may also be present. If the frequency of misfire is high the Powertrain Control Module (PCM) may place the engine in “Limp-In” mode. The misfire condition may be caused by one or more engine exhaust valves that are slow to close. Late closure of an exhaust valve may be the result of no valve rotation and associated build up of carbon on the exhaust valve stem. This condition may occur when the engine is not allowed to run at engine RPM’s that are greater than 3,200 RPM. At 3,200 RPM or higher the engine exhaust valves will rotate if not impeded by high carbon deposits. Low engine RPM’s and high carbon deposits are associated with short trip driving where the vehicle engine is not allowed to fully warm to normal engine operating temperatures. Cold ambient temperatures will increase engine warm-up time and add to the opportunity of carbon deposit build-up on the stem of the engine exhaust valve. "Matt Macchiarolo" > wrote in message ... > Bill, have you ever even felt a 6-cyl engine misfire? If you had, you > would know that mine is not. > |
#25
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I hate to kick a sleeping dog and start a war here, but does pour-in
injector treatment do any good? Seems like a lot of people say it's worthless. Matt |
#26
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did pass the time by typing:
> I hate to kick a sleeping dog and start a war here, but does pour-in > injector treatment do any good? Seems like a lot of people say it's > worthless. They work. But only use the ones that are for every 5-6000 miles the others are not strong enough. My preference is for the Synpower fuel sytem cleaner. It's worked well in the past to clear up bad fuel. This is the best way to get the engine clean. Of course it runs about $100 from a good mechanic. http://www.motorvac.com/ Speaking of cleaning. Nothing is going to help you if you pick up a tank of this. http://members.cox.net/douglas.wilson/badgas/ -- -- DougW -- 93 ZJ 4.0 http://members.cox.net/wilsond HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors Banks Header - and BEER, in the fridge! |
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