Okay, I tried everything elseI know that the Hanes manual said except one thing. So I let you guys try. So my engine starts to stutter real bad around the 2000-3100 RPM range. Most of the time it's only in 3rd gear. Sometimes it does it in all gears if going up a hill. During this time, it goes through a phase of not wanting to start . Like as in it would start up, then shut off immediately, unless I reved it immediately after start up. Well, I look in my manual, and it says the starting problem is either not enough fuel pressure, or ignition system problems. So two nights ago, I start cheking the coils and sure enough, I find a loose plug on the passenger side coil. Car fires right up. Well, as for the stuttering of the motor, I check my transmission fluid, it's fine. The tranny's rebuilt so I figured a burnt band or plate is out of the question. I put some Lucas in it before I checked the ignition that night. The car quit stuttering as bad, then eventually not at all. Now it has started back. I need help...
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2004 Mustang GT Coupe 5-Speed
MODS: MAC CAI, X-Pipe w/ high-flow cats, Flowmaster Exhaust
Okay, I tried everything elseI know that the Hanes manual said except one thing. So I let you guys try. So my engine starts to stutter real bad around the 2000-3100 RPM range. Most of the time it's only in 3rd gear. Sometimes it does it in all gears if going up a hill. During this time, it goes through a phase of not wanting to start . Like as in it would start up, then shut off immediately, unless I reved it immediately after start up. Well, I look in my manual, and it says the starting problem is either not enough fuel pressure, or ignition system problems. So two nights ago, I start cheking the coils and sure enough, I find a loose plug on the passenger side coil. Car fires right up. Well, as for the stuttering of the motor, I check my transmission fluid, it's fine. The tranny's rebuilt so I figured a burnt band or plate is out of the question. I put some Lucas in it before I checked the ignition that night. The car quit stuttering as bad, then eventually not at all. Now it has started back. I need help...
Sounds like worn out spark plugs/wires. If you haven't recently done so, change your oil, oil, air & fuel filter along with the plugs and wires.
Sounds good, I've never replaced the plug wires before... That's might be a good idea. The fuel filter probably needs to be changed... Everything else is in order... Cool! I check those right away! Thanks!
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2004 Mustang GT Coupe 5-Speed
MODS: MAC CAI, X-Pipe w/ high-flow cats, Flowmaster Exhaust
Sounds good, I've never replaced the plug wires before... That's might be a good idea. The fuel filter probably needs to be changed... Everything else is in order... Cool! I check those right away! Thanks!
Yeah, you got it! One more thing, how many miles do you have on your current spark plugs? I always recommend that people change them along with the fuel filter once a year or every 12-14k miles to keep their engine running smooth. Keeping both of these components in proper working order will also prevent decreasing gas mileage.
I think my plugs might have at least 12K miles on them. I have Bosch Platinum 2s. Which do you recomend? I would like to have Iridiums.
I recommend Autolite copper core 764's for your mustang. Any platinum plugs, especially with 2 or more ground electrodes on them are a BAD choice for mustangs. Basic Autolite copper plugs with the single ground electrode gapped at 0.045 are the way to go.
dude i been havin the same problem my car started jerkin an lagging and jus used to turn off in the middle of the street and when i went to get it taken care of they said its either my spark plugs or ignition coils and said ignition coils **** up a lot so you should get em all replaced at once, first i got my spark plugs fixed then a couple weeks later same thing, then got my bad coil changed not all of them jus the one that went bad, now its like 5 months later and its doing it again i dont know its fuckin frustrating cuz they charged me 160 to change one, so i dont kno what to do spend all that money on 8? or should i get MSD Blaster Coil On Plug Ignition Coil Pack Set: Ford Mustang GT 4.6L 1999-2004 that and try to do it myself cuz i know changed one ignition coil is not worth 100$ for labor while the coil is like 40 or someshit, someone jus help me im new on this site i didnt really kno how to start my own thread or post or whatever so sorry for wrtin all this crap on here but HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Swapping out the coils (or COPs) is not a bad job, you can do it. And stick with the Motorcraft parts, this is one of those areas where the aftermarket is suspect. And yes, they usually do this, one or two go bad, then a month later, a couple more...
Better to swap them all out, other than the new one, though I expect you can buy the set cheaper than 7 of them a la carte.
NOTE: We can give better advice if we know what year, model and mods you have on your car. Try www.rockauto.com for parts, they carry the 96 model's Motorcraft coils for about $80.
Quote:
Originally Posted by arteztx
dude i been havin the same problem my car started jerkin an lagging and jus used to turn off in the middle of the street and when i went to get it taken care of they said its either my spark plugs or ignition coils and said ignition coils **** up a lot so you should get em all replaced at once, first i got my spark plugs fixed then a couple weeks later same thing, then got my bad coil changed not all of them jus the one that went bad, now its like 5 months later and its doing it again i dont know its fuckin frustrating cuz they charged me 160 to change one, so i dont kno what to do spend all that money on 8? or should i get MSD Blaster Coil On Plug Ignition Coil Pack Set: Ford Mustang GT 4.6L 1999-2004 that and try to do it myself cuz i know changed one ignition coil is not worth 100$ for labor while the coil is like 40 or someshit, someone jus help me im new on this site i didnt really kno how to start my own thread or post or whatever so sorry for wrtin all this crap on here but HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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tripleblack
"You can never be free until you let yourself go."
Procharged 2002 Mustang GT 5 Speed 351rwhp 353rwtq at 10psi
Next summer looking to go with:
Bilstien shocks + struts, Lowering springs (brand still TBD (any suggestions?)), MM CC plates, front + rear sway bars, subframes, and upper and lower control arms.
Time to make the pony ride some rails
Engine stuttering bad 
