Check engine light but no problem?

[cwf340]

[quote=REDFIRE_GT_BEAST;6613363]Um cwf340 yea the CAI does i seen it with my own eyes the CAI was worped from heat of engine so we took it out put new one in and the check engine light went off so yea i think CAI can unless you have some other reasoning.[/QUOTE I dont think you understand, yes a warped/leaking CAI can cause a CEL. but not a misfire code. a CAI would most likely set a lean code p0171,p0174. totally differant codes from a misfire code.

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[Synyster06Gates]

Originally Posted by cwf340

I dont think you understand, yes a warped/leaking CAI can cause a CEL. but not a misfire code. a CAI would most likely set a lean code p0171,p0174. totally differant codes from a misfire code.

Don't argue. cwf340 is right on this one.

[Derf00]

Originally Posted by 2004 V6 3.9

I dont think they have.. They said they could take out each individual coil and stree test it but the dealer said he would take care of it, said he checked and everything was fine.. He ended up bringing it back to Ford although and they still couldnt figture out whats causing it.. My service engine light was blinking for about 5 mins earlier today then just went back to being solid/on. If you turn the service light off it stays off sometimes for about an hour then back on

a blinking service light is severe misfire as in damage to the engine could occur. You would definitely feel it.

If the car feels like it's running fine while all of this is going on, it could be the loop to the PCM is bad. I've heard of it happenign where the there is absolutely nothing wrong with the car but a loose PCM wire causes a code to be thrown. It's rare but it does happen.

[REDFIRE_GT_BEAST]

oh ok didnt fully understand what he was saying.

[2004 V6 3.9]

Originally Posted by Derf00

a blinking service light is severe misfire as in damage to the engine could occur. You would definitely feel it.

If the car feels like it's running fine while all of this is going on, it could be the loop to the PCM is bad. I've heard of it happenign where the there is absolutely nothing wrong with the car but a loose PCM wire causes a code to be thrown. It's rare but it does happen.

The car feels 100% fine... which is why no one knows what it is yet.. Im droping it off to ford in about a week for them to check if its burnt exhaust valves or w.e. I saw online a test for this was to hold a piece of paper to the exhaust and if it sucks in at all its burnt valves and the paper does suck in slightly..


So heres the mods I know about/did(performance/looks)
CAI
Lowered
HID fogs
Tints
"MUSTANG" bumper insert
plate covers

Soon to come:
Borla Exhaust
HID headlights
RIMS!! after winter*

heres a couple pics they didnt come out that good thou only had my phone

[cwf340]

Just wondering if you found what the problem is yet?

[2004 V6 3.9]

Originally Posted by cwf340

Just wondering if you found what the problem is yet?

yeah Ford said they have to replace 2 heads which they wont even get this week so I have to wait @ least another week and 1/2 Im surprised after finding that out that the car was driving fine.. hhmmm....

[rygi23]

Originally Posted by 2004 V6 3.9

yeah Ford said they have to replace 2 heads which they wont even get this week so I have to wait @ least another week and 1/2 Im surprised after finding that out that the car was driving fine.. hhmmm....

Whoa, whoa, whoa.....am I reading you right? Both of your heads have to be completly replaced?

[watman02]

well he said that the misfires were on 7and 8 arnt they on oposit banks that would explain why both need replaced.

[cwf340]

no 7 and 8 are the rear 2 cylinders on the left side. you only need the left side head. unless you just want to replace both.