New member here need a little help

[Twovalvedvert03]

Ive got an 03 gt vert 5 speed and the check engine light flashes and car cuts out a little bit then it stops flashing and the car runs great .. It does this every once in a while... I changed the plugs cause it was the cheapest to do I had the check ranging code check they were misfires is this a normal thing that happens to these what could it be? Thanks guys

 

[northerncountry]

I am not a Two valve pro but I would check your plug coils sometimes those go bad. Also just for good measure I would run some Sea foam though it and try to clean out the sensors.... My 2 cents

 

[wickedstangs]

Ive got an 03 gt vert 5 speed and the check engine light flashes and car cuts out a little bit then it stops flashing and the car runs great .. It does this every once in a while... I changed the plugs cause it was the cheapest to do I had the check ranging code check they were misfires is this a normal thing that happens to these what could it be? Thanks guys

If you checked your codes the misfire would have giving you a code.. do you have that code number? So we can help you further.. misfires are not always associated with electrical.. plugs, coils, etc..

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[Twovalvedvert03]

Ok I'll check the codes when I get home I'll let u guys know

 

[SilverCobra7]

Your problem could also be an injector... Usually a code scanner pin points which cylinder has the misfire and you could go from there. Had this happen on my parents F-150... Coil ended up been bad.

 

[Twovalvedvert03]

I couldn't get a diagnostic tool but I remember it said misfire in cylinders 2 4 8 I'm sorry for not having so much info....

 

[wickedstangs]

I couldn't get a diagnostic tool but I remember it said misfire in cylinders 2 4 8 I'm sorry for not having so much info....

where are you located? If in SD can check your codes for you..

 

[Ford1288]

Can also go to O'reilly or autozone and use their reader.

 

[Twovalvedvert03]

I'm located in Palmdale ca I think it might be the coils but before I spend the cash I wanna make sure

 

[Twovalvedvert03]

Ok I got the trouble codes guys p0301 , p0302, p0306 which are posited in cylinders 1 2 6

 

[SnakeBit]

If you have a code coming up for a misfire on a specific cylinder. It would be limited to spark plug, injector, coil, or bent valve resulting in no compression. If you have a misfire still there after replacing the plugs, you will feel it during normal driving. If the problem is still there, unplug the injector to that cylinder while the engine is running. Listen and see if the idle changes. If idle changes, then the injector is good. Next, swap a coil and see if the misfire goes to the swapped cylinder. That will tell you if the coil is bad.

 

[Twovalvedvert03]

I don't think it's a bent valve or at least I hope so ... Cause the car run awesome normally it only misses every once in a while.... Then it goes away...

 

[SilverCobra7]

I don't think it's a bent valve or at least I hope so ... Cause the car run awesome normally it only misses every once in a while.... Then it goes away...

How's the charge on the battery? is it at/or above 14V... Alternator could be going bad throwing up the flashing CEL and coils lose voltage!

 

[SnakeBit]

from what I've seen its usually injectors but who knows

 

[Twovalvedvert03]

That's what I was thinking cause the batt light flashed the other day but I took it to autozone and batt was good lol

 

[SilverCobra7]

That's what I was thinking cause the batt light flashed the other day but I took it to autozone and batt was good lol

Did they test the alternator?


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[Twovalvedvert03]

No should I have them check it? Thanks fOr your help

 

[SilverCobra7]

Yes... a bad alternator will cause misfires cause of the drop in Voltage. I would check it to be on the safe side. Then you could go from there... Test your coils with multimeter and if that checks out, move to your injectors.


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