Mach 1 misfire

DsmDave · September 25th, 2011, 07:05 AM

Hello. When I got the mach it had a check engine light and a misfire. Did the plugs and got fid of the light but not the misfire. Some nights the car does not have the sputter. Sometimes it does. The car has not thrown a check engine light since. I remember a heated ho2 code at the same time but it has never came back.

I am beginning to think its either the frps(fuel rail pressure sensor) or the coil over plugs. Could it be a valve? I didn't think so because some days its undrivable almost and others not.

You know you have coil on plugs when you can predict the rain lol.

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03Black2v · September 25th, 2011, 09:09 PM

Did you check your air filter when you put the plugs in?

DsmDave · September 25th, 2011, 09:11 PM

Its dirty but this feels like something is just cutting out

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mustang50lx · September 25th, 2011, 11:13 PM

It's probably a bad coil. If you have access tio a scanner check the mode 6 data. It will tell you which cylinder is misfiring if it is not setting a code. What was the code before you put the spark plugs in?

DsmDave · September 26th, 2011, 05:05 AM

I'm positive its that or a frps. No access but I'm just gonna buy brand new coils. Any cheap options

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DickH · September 26th, 2011, 02:09 PM

fuel pump going bad?

03Black2v · September 26th, 2011, 04:56 PM

My gt was cutting out and my filter was dirty. Changed it, fixed the problem but I would say buy new coils and see if that works out. MSD is what I would go with.

DsmDave · September 26th, 2011, 06:18 PM

I'm gonna try an intake. I hope its not the pump. I'm gonna start saving for some coils. Its never easy

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03Black2v · September 26th, 2011, 10:42 PM

Hope that works. Do you have any pics of your mach?

DsmDave · September 27th, 2011, 05:51 AM

Yes I do. Ill post

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DsmDave · September 27th, 2011, 05:53 AM

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DsmDave · September 27th, 2011, 05:54 AM

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03Black2v · September 27th, 2011, 05:32 PM

Looks good man, I love tr machs.

DsmDave · September 27th, 2011, 07:20 PM

Thanks I love tr. Next would be an azure blue

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Darko · September 28th, 2011, 02:11 AM

Originally Posted by mustang50lx

It's probably a bad coil. If you have access tio a scanner check the mode 6 data. It will tell you which cylinder is misfiring if it is not setting a code. What was the code before you put the spark plugs in?

I vote for this!

DsmDave · October 2nd, 2011, 03:55 PM

Well I have gotten my tuner back from sct and after loading an sct bama tune I have no issues?

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September 25th, 2011, 07:05 AM	#1
DsmDave Enthusiast 2001 Mustang GT Join Date: Nov 2010 Location: Poughquag NY Posts: 979 iTrader: 2 reviews	Mach 1 misfire Hello. When I got the mach it had a check engine light and a misfire. Did the plugs and got fid of the light but not the misfire. Some nights the car does not have the sputter. Sometimes it does. The car has not thrown a check engine light since. I remember a heated ho2 code at the same time but it has never came back. I am beginning to think its either the frps(fuel rail pressure sensor) or the coil over plugs. Could it be a valve? I didn't think so because some days its undrivable almost and others not. You know you have coil on plugs when you can predict the rain lol. Sent from my DROID3 using AutoGuide App __________________ bbk longtubes, bassani x, borla stingers, AM intake,bbk throttle body, Under drive pullies,Zex wet 125hp kit SCT Tuned by bama and drag radials, drag springs, agx shocks, lower control arms, subframe connectors MM+Cleavage Club #26

September 25th, 2011, 09:11 PM	#3
DsmDave Enthusiast 2001 Mustang GT Join Date: Nov 2010 Location: Poughquag NY Posts: 979 iTrader: 2 reviews	Its dirty but this feels like something is just cutting out Sent from my DROID3 using AutoGuide App __________________ bbk longtubes, bassani x, borla stingers, AM intake,bbk throttle body, Under drive pullies,Zex wet 125hp kit SCT Tuned by bama and drag radials, drag springs, agx shocks, lower control arms, subframe connectors MM+Cleavage Club #26

September 26th, 2011, 05:05 AM	#5
DsmDave Enthusiast 2001 Mustang GT Join Date: Nov 2010 Location: Poughquag NY Posts: 979 iTrader: 2 reviews	I'm positive its that or a frps. No access but I'm just gonna buy brand new coils. Any cheap options Sent from my DROID3 using AutoGuide App __________________ bbk longtubes, bassani x, borla stingers, AM intake,bbk throttle body, Under drive pullies,Zex wet 125hp kit SCT Tuned by bama and drag radials, drag springs, agx shocks, lower control arms, subframe connectors MM+Cleavage Club #26

September 26th, 2011, 02:09 PM	#6
DickH MM Fanatic 2003 gt 5.4 32v on the way Join Date: May 2007 Location: Omaha Posts: 4,188 iTrader: 2 reviews	fuel pump going bad? __________________ 2003 Mustang gt - usual mods - slowly working on 5.4 swap 2004 srt4 - Stock DD/winter beater Click here for your tuning needs Before asking a gearing related question click THIS link and enjoy all your saved time.

September 26th, 2011, 06:18 PM	#8
DsmDave Enthusiast 2001 Mustang GT Join Date: Nov 2010 Location: Poughquag NY Posts: 979 iTrader: 2 reviews	I'm gonna try an intake. I hope its not the pump. I'm gonna start saving for some coils. Its never easy Sent from my DROID3 using AutoGuide App __________________ bbk longtubes, bassani x, borla stingers, AM intake,bbk throttle body, Under drive pullies,Zex wet 125hp kit SCT Tuned by bama and drag radials, drag springs, agx shocks, lower control arms, subframe connectors MM+Cleavage Club #26

September 25th, 2011, 11:13 PM	#4
mustang50lx Regular Join Date: Jul 2011 Posts: 52 iTrader: 0 reviews	It's probably a bad coil. If you have access tio a scanner check the mode 6 data. It will tell you which cylinder is misfiring if it is not setting a code. What was the code before you put the spark plugs in?

September 27th, 2011, 05:51 AM	#10
DsmDave Enthusiast 2001 Mustang GT Join Date: Nov 2010 Location: Poughquag NY Posts: 979 iTrader: 2 reviews	Yes I do. Ill post Sent from my DROID3 using AutoGuide App __________________ bbk longtubes, bassani x, borla stingers, AM intake,bbk throttle body, Under drive pullies,Zex wet 125hp kit SCT Tuned by bama and drag radials, drag springs, agx shocks, lower control arms, subframe connectors MM+Cleavage Club #26

September 27th, 2011, 05:53 AM	#11
DsmDave Enthusiast 2001 Mustang GT Join Date: Nov 2010 Location: Poughquag NY Posts: 979 iTrader: 2 reviews	Sent from my DROID3 using AutoGuide App __________________ bbk longtubes, bassani x, borla stingers, AM intake,bbk throttle body, Under drive pullies,Zex wet 125hp kit SCT Tuned by bama and drag radials, drag springs, agx shocks, lower control arms, subframe connectors MM+Cleavage Club #26

September 27th, 2011, 05:54 AM	#12
DsmDave Enthusiast 2001 Mustang GT Join Date: Nov 2010 Location: Poughquag NY Posts: 979 iTrader: 2 reviews	Sent from my DROID3 using AutoGuide App __________________ bbk longtubes, bassani x, borla stingers, AM intake,bbk throttle body, Under drive pullies,Zex wet 125hp kit SCT Tuned by bama and drag radials, drag springs, agx shocks, lower control arms, subframe connectors MM+Cleavage Club #26

September 27th, 2011, 07:20 PM	#14
DsmDave Enthusiast 2001 Mustang GT Join Date: Nov 2010 Location: Poughquag NY Posts: 979 iTrader: 2 reviews	Thanks I love tr. Next would be an azure blue Sent from my DROID3 using AutoGuide App __________________ bbk longtubes, bassani x, borla stingers, AM intake,bbk throttle body, Under drive pullies,Zex wet 125hp kit SCT Tuned by bama and drag radials, drag springs, agx shocks, lower control arms, subframe connectors MM+Cleavage Club #26

October 2nd, 2011, 03:55 PM	#16
DsmDave Enthusiast 2001 Mustang GT Join Date: Nov 2010 Location: Poughquag NY Posts: 979 iTrader: 2 reviews	Well I have gotten my tuner back from sct and after loading an sct bama tune I have no issues? Sent from my DROID3 using AutoGuide App __________________ bbk longtubes, bassani x, borla stingers, AM intake,bbk throttle body, Under drive pullies,Zex wet 125hp kit SCT Tuned by bama and drag radials, drag springs, agx shocks, lower control arms, subframe connectors MM+Cleavage Club #26

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