2002 4.0 shutter missfire
#1
2002 4.0 shutter missfire
for about 2 months the engine has been shuttering just a little when ideling at stop lights but not under acceleration or at ant cursing speed. it has gotten progressevly worse and has finely thrown a code P0307 #7 cyl misfire. we bought the car with about 80k on it, it now has 92k. im thinking its time for new plugs.
what brand plug is recommended and do you recommend replacing the coil packs at this time?
what brand plug is recommended and do you recommend replacing the coil packs at this time?
#2
#3
I took the spark plug cover off to find the # 7 & 8 where after market coils. when I tried to unbolt #7 to swap it the bolt eye broke. I bought a new one and also pulled the plugs on this side of the motor, they all looked like they had been changed recently and also looked like they where firing ok. put it all back together and took it for a ride. still am getting the #7 misfire fault. im going to run a tank full of gas with seafoam but im at a loss after that.
#4
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johnr (07-08-2014)
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johnr (07-08-2014)
#11
well I had a chance tonight so I glued the bolt eyelet back on the coil I took out and broke off and put it in the RIGHT #7 slot, fixed the problem. for someone who reads all directions for anything I do you would think I would have at least breezed through the manual.
thanks again for the info and I will be looking into the tensioners. I have been told that chains start to make noise at start up when they start to go is this right?
thanks again for the info and I will be looking into the tensioners. I have been told that chains start to make noise at start up when they start to go is this right?
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johnr (07-09-2014)
#13
My stype 3.0 had 3 bad coil packs it ran horribly I bought a new set (easier becaude you grt all 6 new plus only taking manifold off once) immediate difference.
Also I put seafoam in my car last week and it's ran horribly since and getting failsafe mode at times, and always use 91 or higher. Anyone had bad experience with seafoam on jags?
Also I put seafoam in my car last week and it's ran horribly since and getting failsafe mode at times, and always use 91 or higher. Anyone had bad experience with seafoam on jags?
#14
My stype 3.0 had 3 bad coil packs it ran horribly I bought a new set (easier becaude you grt all 6 new plus only taking manifold off once) immediate difference.
Also I put seafoam in my car last week and it's ran horribly since and getting failsafe mode at times, and always use 91 or higher. Anyone had bad experience with seafoam on jags?
Also I put seafoam in my car last week and it's ran horribly since and getting failsafe mode at times, and always use 91 or higher. Anyone had bad experience with seafoam on jags?
#15
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It's very unlikely that the Seafoam is causing the problem. This product is nothing more than a few pennies worth of 50% light oil, 30% naptha and 20% isopropyl alcohol. It is VERY effective in doing what it was invented for (unclogging WWII vintage 2 stroke outboard motor carbs) but has little or no purpose on anything else.
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