car is missing or skipping or something.

kratos2250 · December 23rd, 2008, 07:27 PM

I have a 03 cobra. As I was driving home last night I was passing somebody and as I got on it, I noticed it missing. I was like wtf, there's no check engine light on and it runs fine through all gears until WOT then it skips. Seems like it doesn't do it until the car is warmed up. I think I might need a new clutch? Any ideas

ZsMach1 · December 23rd, 2008, 07:50 PM

Not sure if its the same thing that I had a long time ago but if it feels like it hesitates a little your injectors might be a little dirty. I ran some fuel injector cleaner through it and it fixed the problem right up. I put the cleaner in and filled up the tank, by the time the tank was at 1/4 it felt pretty good. I used lucas fuel system cleaner. I hope this works, if not the cleaner is pretty cheap so no worries on wasting money and if it works than you just fixed your car for like $12. =)

Fluffy The Rhino · December 23rd, 2008, 08:13 PM

While you're at it, check your spark plugs.

Could be any number of things causing this. Although, a misfire *should* light up your SES. Not always, but always worth a shot. Check for moisture under the covers.

kratos2250 · December 23rd, 2008, 08:19 PM

I checked under the spark plugs no moisture found. How do you pull the spark plugs? I'm really leaning toward my clutch slipping. It olny does it at WOT.

ZsMach1 · December 23rd, 2008, 08:41 PM

Mine did the same thing at WOT and I changed the plugs and nothing, changed my fuel filter and nothing. Ran the fuel system cleaner and it worked. Its the fastest thing to try and not expensive at all. If that dont work, do what fluffythe rhino said and check the plugs. That or check the plugs then if the plugs are ok run the cleaner.

Fluffy The Rhino · December 23rd, 2008, 09:59 PM

Originally Posted by kratos2250

I checked under the spark plugs no moisture found. How do you pull the spark plugs? I'm really leaning toward my clutch slipping. It olny does it at WOT.

You don't HAVE to pull the plugs to check for moisture. Pull the covers off. If there's moisture or at least a lot of obvious coloration (brown/yellow) then you a plug could have backed out. It'll cause misfires. It can happen at low RPMs or WOT. Mine was doing this, and it got progressively worse. It got to the point that I knew it was a misfire, and that's when I pulled the plugs, and found that one of them had backed out. New plugs took care of the problem.

To pull the plugs, you'll need a racheting wrench and long extension. However, it would be quicker to run the fuel system cleaner, and easier to do. Try that first, and if it doesn't work, try the plugs.

When was the last time the plugs were changed?

Also, how many miles are on your car/clutch?

kratos2250 · December 24th, 2008, 05:37 PM

My car has 90,000 miles on it so it might need a spark plug change. Right now I have some lucas fuel injection cleaner running through right now. I've burnt a quater so far and it still does it. By the way what kind of plugs do you guys use, and there's no ses light on.

Mustang RacR94 · December 24th, 2008, 06:30 PM

sounds like either you got stiffed with a little bit of shitty gas, or maybe your fuel filter is getting clogged at tad, or your fuel pumps might be spiking out do to the mods, its unusual but it happened to my friends 04 with very simular mods, and use some NGK copper plugs, do not use platinum plugs in your car.

so It dint do this when you got it right, just now, if so you can check the plugs, check if there really white while your at it

kratos2250 · December 24th, 2008, 06:49 PM

what does it mean if they are white?

Fluffy The Rhino · December 24th, 2008, 08:11 PM

If you've never changed your plaugs, then do it. I don't remember what plugs I went with. All I know is they cost a lot, and they work like a champ. Usually, OEM is the best way to go.

20psirabbit · December 25th, 2008, 02:52 PM

well how many miles did it have when you got it and what kind of maintenance have you done in the meantime?
fuel filter and spark plugs are probably highest up given the mileage, should probably just do them regardless.
check for fault codes, the car can throw a fault code without tripping the light.
pull the vacuum line on the frps and smell for fuel, probably not it but it's a good idea to check and that dumb sensor causes all sorts of hell.

20psirabbit · December 25th, 2008, 02:52 PM

white plugs means lean

December 23rd, 2008, 07:27 PM	#1
kratos2250 Regular Join Date: Feb 2007 Posts: 135 iTrader: 0 reviews	car is missing or skipping or something. I have a 03 cobra. As I was driving home last night I was passing somebody and as I got on it, I noticed it missing. I was like wtf, there's no check engine light on and it runs fine through all gears until WOT then it skips. Seems like it doesn't do it until the car is warmed up. I think I might need a new clutch? Any ideas __________________ 2003 Black Cobra. 2.3 whipple JLT RAI Dragon t/b 60s BAP Mafia Xcal3 MAC LTs w/ORX-pipe Borla stingers Billetflow IRS brace Eibach springs 1989 GT AFM b-31 cam crane springs 6.3 pushrods elec. W/P/fan 3:73s Manual steering tri-ax Shorties-orh-flows

December 23rd, 2008, 07:50 PM	#2
ZsMach1 Regular 2003 Mach1 Mustang 13.83@101.67 Join Date: Jan 2007 Location: Bakersfield Posts: 289 iTrader: 0 reviews	Not sure if its the same thing that I had a long time ago but if it feels like it hesitates a little your injectors might be a little dirty. I ran some fuel injector cleaner through it and it fixed the problem right up. I put the cleaner in and filled up the tank, by the time the tank was at 1/4 it felt pretty good. I used lucas fuel system cleaner. I hope this works, if not the cleaner is pretty cheap so no worries on wasting money and if it works than you just fixed your car for like $12. =) __________________ 2003 Mach1 mustang: JLT Cold Air Intake (Dark shadow gray) FRPP Aluminum Driveshaft Xcal2 with custom tune Magnaflow x-pipe Mac catback(still have all stock cats) Tokico illumina adjustable rear shocks Nitto 555R 275/40/17 Last edited by ZsMach1; December 23rd, 2008 at 08:06 PM.

December 23rd, 2008, 08:13 PM	#3
Fluffy The Rhino Bearer of Bad News I has mustang and legacy. Slower than my Ruger. Join Date: Sep 2007 Location: The Fuckening Posts: 2,377 iTrader: 0 reviews	While you're at it, check your spark plugs. Could be any number of things causing this. Although, a misfire should light up your SES. Not always, but always worth a shot. Check for moisture under the covers. __________________ ~MOD NUTSWINGER~ My Tongue Soothes Razorburn STOPSAYINGFAIL.COM EVERY FART IS A GAMBLE Just Think Of Me As A White Blood Cell.

December 23rd, 2008, 08:19 PM	#4
kratos2250 Regular Join Date: Feb 2007 Posts: 135 iTrader: 0 reviews	I checked under the spark plugs no moisture found. How do you pull the spark plugs? I'm really leaning toward my clutch slipping. It olny does it at WOT. __________________ 2003 Black Cobra. 2.3 whipple JLT RAI Dragon t/b 60s BAP Mafia Xcal3 MAC LTs w/ORX-pipe Borla stingers Billetflow IRS brace Eibach springs 1989 GT AFM b-31 cam crane springs 6.3 pushrods elec. W/P/fan 3:73s Manual steering tri-ax Shorties-orh-flows

December 23rd, 2008, 08:41 PM	#5
ZsMach1 Regular 2003 Mach1 Mustang 13.83@101.67 Join Date: Jan 2007 Location: Bakersfield Posts: 289 iTrader: 0 reviews	Mine did the same thing at WOT and I changed the plugs and nothing, changed my fuel filter and nothing. Ran the fuel system cleaner and it worked. Its the fastest thing to try and not expensive at all. If that dont work, do what fluffythe rhino said and check the plugs. That or check the plugs then if the plugs are ok run the cleaner. __________________ 2003 Mach1 mustang: JLT Cold Air Intake (Dark shadow gray) FRPP Aluminum Driveshaft Xcal2 with custom tune Magnaflow x-pipe Mac catback(still have all stock cats) Tokico illumina adjustable rear shocks Nitto 555R 275/40/17

December 24th, 2008, 05:37 PM	#7
kratos2250 Regular Join Date: Feb 2007 Posts: 135 iTrader: 0 reviews	My car has 90,000 miles on it so it might need a spark plug change. Right now I have some lucas fuel injection cleaner running through right now. I've burnt a quater so far and it still does it. By the way what kind of plugs do you guys use, and there's no ses light on. __________________ 2003 Black Cobra. 2.3 whipple JLT RAI Dragon t/b 60s BAP Mafia Xcal3 MAC LTs w/ORX-pipe Borla stingers Billetflow IRS brace Eibach springs 1989 GT AFM b-31 cam crane springs 6.3 pushrods elec. W/P/fan 3:73s Manual steering tri-ax Shorties-orh-flows

December 24th, 2008, 06:30 PM	#8
Mustang RacR94 MM Fanatic 99 cobra N/A Join Date: Dec 2006 Location: Fayetteville NC Posts: 3,169 iTrader: 0 reviews	sounds like either you got stiffed with a little bit of shitty gas, or maybe your fuel filter is getting clogged at tad, or your fuel pumps might be spiking out do to the mods, its unusual but it happened to my friends 04 with very simular mods, and use some NGK copper plugs, do not use platinum plugs in your car. so It dint do this when you got it right, just now, if so you can check the plugs, check if there really white while your at it __________________ 99 Cobra 03 Cobra motor AFCO H/E Pulley JLT CAI BBK L/T off road H/steeda catback SCT MAF Tune 03 cobra pumps HVGC

December 24th, 2008, 06:49 PM	#9
kratos2250 Regular Join Date: Feb 2007 Posts: 135 iTrader: 0 reviews	what does it mean if they are white? __________________ 2003 Black Cobra. 2.3 whipple JLT RAI Dragon t/b 60s BAP Mafia Xcal3 MAC LTs w/ORX-pipe Borla stingers Billetflow IRS brace Eibach springs 1989 GT AFM b-31 cam crane springs 6.3 pushrods elec. W/P/fan 3:73s Manual steering tri-ax Shorties-orh-flows

December 24th, 2008, 08:11 PM	#10
Fluffy The Rhino Bearer of Bad News I has mustang and legacy. Slower than my Ruger. Join Date: Sep 2007 Location: The Fuckening Posts: 2,377 iTrader: 0 reviews	If you've never changed your plaugs, then do it. I don't remember what plugs I went with. All I know is they cost a lot, and they work like a champ. Usually, OEM is the best way to go. __________________ ~MOD NUTSWINGER~ My Tongue Soothes Razorburn STOPSAYINGFAIL.COM EVERY FART IS A GAMBLE Just Think Of Me As A White Blood Cell.

December 25th, 2008, 02:52 PM	#11
20psirabbit Newbie Join Date: Sep 2008 Posts: 21 iTrader: 0 reviews	well how many miles did it have when you got it and what kind of maintenance have you done in the meantime? fuel filter and spark plugs are probably highest up given the mileage, should probably just do them regardless. check for fault codes, the car can throw a fault code without tripping the light. pull the vacuum line on the frps and smell for fuel, probably not it but it's a good idea to check and that dumb sensor causes all sorts of hell.

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