Dam Service Engine LIght on AGAIN!!!

jrfan4life · March 27th, 2007, 07:40 PM

OK...so 2 1/2 weeks ago I get a full tune up... Everything is fine for about 2 days.... Then I start the car and dam light came on....went to garage...Dam Ignition coil went bad... I was like...OK....just my luck... I drove it all that day then parked it and went to Florida for a week...Came back today....Went to get pizza...Let it run for a bit seemed rough but I was like...well it did sit for a week. Started down the road and the dam light came back on!!!!!

I just got back from bringing it to my mechanic....I guess Ill fing out tomorrow.... I was thinking back to when I got the tune up at the bottom of the sheet it said "Bullitt Tune" I didnt think much of it then but now?....Could it be tuned to the wrong specs?

I am a GT......2001.... NOT BULLITT.....

ChrisJ · March 27th, 2007, 07:43 PM

The only difference is the Bullitt has a different Intake the rest is the same...Its not that much of a difference N/A...

When you say rough what do you mean?

More details...

Casper98GT · March 27th, 2007, 08:06 PM

probably a P0300-p0308

jrfan4life · March 27th, 2007, 08:08 PM

Realy hesitant when pressing on the accel. Seams like its skipping when you listen to the exhaust... rough idle..... Casper.....what do those codes mean?

Casper98GT · March 27th, 2007, 08:13 PM

Yeah sounds like a misfire especially if the check engine light on. The codes are p0300 : random misfire, 301 :cyl 1, 302-308 cyl 2-8. you get the idea.

Casper98GT · March 27th, 2007, 08:14 PM

Coil packs go bad alot anyways

jrfan4life · March 27th, 2007, 09:22 PM

Chris do you have any input?

Timber · March 27th, 2007, 09:26 PM

If you want to look for a bad coil pack, pull the connector off them one at a time with the engine idling. If the coil is good, when you disconnect it the idle will get worse. If you disconnect one and there is no change, you've found a bad coil or possibly just a bad plug. That shouldn't take more than ten minutes to test...

ChrisJ · March 27th, 2007, 09:27 PM

Originally Posted by Timber

If you want to look for a bad coil pack, pull the connector off them one at a time with the engine idling. If the coil is good, when you disconnect it the idle will get worse. If you disconnect one and there is no change, you've found a bad coil or possibly just a bad plug. That shouldn't take more than ten minutes to test...

I would try that...

Also I would contact whoever tuned the car and let them know what is going on...It could be an issue with the tune...

jrfan4life · March 28th, 2007, 03:52 AM

OK......so I am going to buy 8 brand new Accel Super coils... Take a look at these...is there anything else I need? It says direct replacemnt for stock... http://cgi.ebay.com/ebaymotors/ACCEL...00881665QQrdZ1

Remember I am still learning as I go here. So I unbolt old coil then pull it off the plug... then place new one on press it on to the plug, bolt it down and Im done?....well connect the wire....then done.....did I miss anything?

Drgnracin72 · March 28th, 2007, 04:39 AM

nope thats about all there is to changing a coil

Timber · March 28th, 2007, 07:07 AM

Did you find another bad coil? I'd hate to see you throw parts at it trying to fix it...

jrfan4life · March 28th, 2007, 07:18 AM

My machanic is gonna look at it this morning.... If he says its another bad coil... then im gonna order them and do it my self.... Im just a little hesitaant about replacing them my self... U have any input on that for me....maby how to do it?

Timber · March 28th, 2007, 07:34 AM

I haven't changed the plugs yet but from what I've been told it's one 7mm bolt holding the coil on. Unplug the connector, remove the bolt, and wiggle it off the plug.

I wouldn't pay him to check the coils without checking them yourself first the way I mentioned before. It's really simple to do and will literally only take about 5 minutes. If you unplug one and it makes the car run even worse, just plug it back up - that one is obviously good. If you unplug one and there is zero change, that one isn't firing. At that point you know it's either the coil or spark plug. You can further test that by swapping the one in question with a good one you've already tested then retest those two and see if the dead cylinder moved with the coil or not. If it moved with the coil, you've got a bad coil pack. If not, it may be the spark plug. Pull it and visually inspect it. It's not hard to goof one up if it was dropped while he was giving it a tune up. If it looks good, swap it with a good plug and see if the dead cylinder moves. If it does, change the plug. If it doesn't... Post back.

I know it sounds like a lot but you can tell real quick if you have a dead cylinder or not just by pulling one coil wire off at a time while it's running and looking for one that doesn't change the way the engine runs - that'd be the culprit.

You could easily have a bad O2 or cat or a bad sensor.

Casper98GT · March 28th, 2007, 08:30 AM

hey you live in mass right? Just go to autozone, dont waste youre time unplugging every coil pack. They will check the code for free. Im a ford tech, bring back the code and i can tell you exactly what it is.

Buying all 8 coil packs sounds like a waste of money to me. I replace them all the time. 7mm bolt. You dont need to remove the fuel rail although some people say you do. They are RUBBER, just bend them out of the way.

jrfan4life · March 28th, 2007, 09:37 AM

Casper.... I wana replace them with the Accel Super coils. They say they run 60,000 volts rather than the 40,000 volts that the OEM coils produce. I can buy all 8 for 220.00.... I am thinking better performance.......am I wrong...Check out the link I posted above for the coils.

Casper98GT · March 28th, 2007, 11:50 AM

Youre running a stock or close to stock GT probably right ? Coil packs you will put in and say....wow. Nothing happened. But if you would like them then install them dear.

I know what they are, there are a few other choices out there too, but they are the cheapest. Good luck

jrfan4life · March 28th, 2007, 12:29 PM

Casper.....hay bro thanks for your help.... I ended up buying them just because now I am affraid of the rest folowing suit. I am going to put them in my self because it seams easy enough. My garage said it was #1 this time misfiring... So to ease my mind Im gonna replace all... He didnt charge me for the diagnosis.....So Im gonna make yall proud and replace them my self...lol.. Wish me luck.....

MustangMatt96GT · March 28th, 2007, 12:33 PM

You definatly wont have a problem! This is super simple.

Casper98GT · March 28th, 2007, 01:43 PM

No problem. Hope everything goes well, if you have any questions PM me. But im sure you'l be ok.

March 27th, 2007, 07:43 PM	#2
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	The only difference is the Bullitt has a different Intake the rest is the same...Its not that much of a difference N/A... When you say rough what do you mean? More details... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

March 27th, 2007, 08:06 PM	#3
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	probably a P0300-p0308 __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

March 27th, 2007, 08:08 PM	#4
jrfan4life Hardcore Enthusiast 2001 Mustang GT NA Join Date: Feb 2007 Location: Massachusetts Posts: 1,065 iTrader: 0 reviews	Realy hesitant when pressing on the accel. Seams like its skipping when you listen to the exhaust... rough idle..... Casper.....what do those codes mean? __________________ http://www.myspace.com/the_final_lap

March 27th, 2007, 08:13 PM	#5
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	Yeah sounds like a misfire especially if the check engine light on. The codes are p0300 : random misfire, 301 :cyl 1, 302-308 cyl 2-8. you get the idea. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

March 27th, 2007, 08:14 PM	#6
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	Coil packs go bad alot anyways __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

March 27th, 2007, 07:40 PM	#1
jrfan4life Hardcore Enthusiast 2001 Mustang GT NA Join Date: Feb 2007 Location: Massachusetts Posts: 1,065 iTrader: 0 reviews	Dam Service Engine LIght on AGAIN!!! OK...so 2 1/2 weeks ago I get a full tune up... Everything is fine for about 2 days.... Then I start the car and dam light came on....went to garage...Dam Ignition coil went bad... I was like...OK....just my luck... I drove it all that day then parked it and went to Florida for a week...Came back today....Went to get pizza...Let it run for a bit seemed rough but I was like...well it did sit for a week. Started down the road and the dam light came back on!!!!! I just got back from bringing it to my mechanic....I guess Ill fing out tomorrow.... I was thinking back to when I got the tune up at the bottom of the sheet it said "Bullitt Tune" I didnt think much of it then but now?....Could it be tuned to the wrong specs? I am a GT......2001.... NOT BULLITT..... __________________ http://www.myspace.com/the_final_lap

March 27th, 2007, 09:22 PM	#7
jrfan4life Hardcore Enthusiast 2001 Mustang GT NA Join Date: Feb 2007 Location: Massachusetts Posts: 1,065 iTrader: 0 reviews	Chris do you have any input? __________________ http://www.myspace.com/the_final_lap

March 27th, 2007, 09:26 PM	#8
Timber Enthusiast Join Date: Dec 2006 Location: No point mentioning those bats... Posts: 867 iTrader: 0 reviews	If you want to look for a bad coil pack, pull the connector off them one at a time with the engine idling. If the coil is good, when you disconnect it the idle will get worse. If you disconnect one and there is no change, you've found a bad coil or possibly just a bad plug. That shouldn't take more than ten minutes to test... __________________

March 28th, 2007, 03:52 AM	#10
jrfan4life Hardcore Enthusiast 2001 Mustang GT NA Join Date: Feb 2007 Location: Massachusetts Posts: 1,065 iTrader: 0 reviews	OK......so I am going to buy 8 brand new Accel Super coils... Take a look at these...is there anything else I need? It says direct replacemnt for stock... http://cgi.ebay.com/ebaymotors/ACCEL...00881665QQrdZ1 Remember I am still learning as I go here. So I unbolt old coil then pull it off the plug... then place new one on press it on to the plug, bolt it down and Im done?....well connect the wire....then done.....did I miss anything? __________________ http://www.myspace.com/the_final_lap

March 28th, 2007, 04:39 AM	#11
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,635 iTrader: 2 reviews	nope thats about all there is to changing a coil __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

March 28th, 2007, 07:07 AM	#12
Timber Enthusiast Join Date: Dec 2006 Location: No point mentioning those bats... Posts: 867 iTrader: 0 reviews	Did you find another bad coil? I'd hate to see you throw parts at it trying to fix it... __________________

March 28th, 2007, 07:18 AM	#13
jrfan4life Hardcore Enthusiast 2001 Mustang GT NA Join Date: Feb 2007 Location: Massachusetts Posts: 1,065 iTrader: 0 reviews	My machanic is gonna look at it this morning.... If he says its another bad coil... then im gonna order them and do it my self.... Im just a little hesitaant about replacing them my self... U have any input on that for me....maby how to do it? __________________ http://www.myspace.com/the_final_lap

March 28th, 2007, 07:34 AM	#14
Timber Enthusiast Join Date: Dec 2006 Location: No point mentioning those bats... Posts: 867 iTrader: 0 reviews	I haven't changed the plugs yet but from what I've been told it's one 7mm bolt holding the coil on. Unplug the connector, remove the bolt, and wiggle it off the plug. I wouldn't pay him to check the coils without checking them yourself first the way I mentioned before. It's really simple to do and will literally only take about 5 minutes. If you unplug one and it makes the car run even worse, just plug it back up - that one is obviously good. If you unplug one and there is zero change, that one isn't firing. At that point you know it's either the coil or spark plug. You can further test that by swapping the one in question with a good one you've already tested then retest those two and see if the dead cylinder moved with the coil or not. If it moved with the coil, you've got a bad coil pack. If not, it may be the spark plug. Pull it and visually inspect it. It's not hard to goof one up if it was dropped while he was giving it a tune up. If it looks good, swap it with a good plug and see if the dead cylinder moves. If it does, change the plug. If it doesn't... Post back. I know it sounds like a lot but you can tell real quick if you have a dead cylinder or not just by pulling one coil wire off at a time while it's running and looking for one that doesn't change the way the engine runs - that'd be the culprit. You could easily have a bad O2 or cat or a bad sensor. __________________

March 28th, 2007, 08:30 AM	#15
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	hey you live in mass right? Just go to autozone, dont waste youre time unplugging every coil pack. They will check the code for free. Im a ford tech, bring back the code and i can tell you exactly what it is. Buying all 8 coil packs sounds like a waste of money to me. I replace them all the time. 7mm bolt. You dont need to remove the fuel rail although some people say you do. They are RUBBER, just bend them out of the way. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

March 28th, 2007, 09:37 AM	#16
jrfan4life Hardcore Enthusiast 2001 Mustang GT NA Join Date: Feb 2007 Location: Massachusetts Posts: 1,065 iTrader: 0 reviews	Casper.... I wana replace them with the Accel Super coils. They say they run 60,000 volts rather than the 40,000 volts that the OEM coils produce. I can buy all 8 for 220.00.... I am thinking better performance.......am I wrong...Check out the link I posted above for the coils. __________________ http://www.myspace.com/the_final_lap

March 28th, 2007, 12:33 PM	#19
MustangMatt96GT Proud American 1996 Mustang GT Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,689 iTrader: 3 reviews	You definatly wont have a problem! This is super simple. __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions 25.3 SFI Chassis Build Never Lift Racecars

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March 28th, 2007, 11:50 AM	#17
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	Youre running a stock or close to stock GT probably right ? Coil packs you will put in and say....wow. Nothing happened. But if you would like them then install them dear. I know what they are, there are a few other choices out there too, but they are the cheapest. Good luck __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

March 28th, 2007, 12:29 PM	#18
jrfan4life Hardcore Enthusiast 2001 Mustang GT NA Join Date: Feb 2007 Location: Massachusetts Posts: 1,065 iTrader: 0 reviews	Casper.....hay bro thanks for your help.... I ended up buying them just because now I am affraid of the rest folowing suit. I am going to put them in my self because it seams easy enough. My garage said it was #1 this time misfiring... So to ease my mind Im gonna replace all... He didnt charge me for the diagnosis.....So Im gonna make yall proud and replace them my self...lol.. Wish me luck..... __________________ http://www.myspace.com/the_final_lap

March 28th, 2007, 01:43 PM	#20
Casper98GT Hardcore Enthusiast Join Date: Aug 2005 Location: NEW HAMPSHIRE Posts: 2,393 iTrader: 0 reviews	No problem. Hope everything goes well, if you have any questions PM me. But im sure you'l be ok. __________________ 91 LX, 5spd. Ex:Toyota/Ford tech Marine Machinery Technician, Department of Defense.

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