Bad Coil

[03MUSCLE]

How can I tell which one of my coils is bad? I get a high rpm sputter when i stab the throttle. No " check engine" light.

 

[Blackmax]

How can I tell which one of my coils is bad? I get a high rpm sputter when i stab the throttle. No " check engine" light.

When had a coil go it gave a code and showed whic one it was.

 

[Speedboosted]

You could try swapping them around, although if it's not giving any codes I feel its not ignition related

 

[03MUSCLE]

Fuel filter??

 

[03MUSCLE]

My 03 had a bad coil and no code???Im baffled......................I'm gonna try switchin half the coils on one side then the other to rule out a coil.

 

[heatsoaked12]

Get an ohm meter and check resistance across each ignition coil. They should all show very close to the same resistance as each other. If one is way out, good chance its bad. High speed sputter does sound like a lean condition as well. check your plugs while your in there.

 

[03MUSCLE]

Get an ohm meter and check resistance across each ignition coil. They should all show very close to the same resistance as each other. If one is way out, good chance its bad. High speed sputter does sound like a lean condition as well. check your plugs while your in there.

should this be done while the car is running??

 

[99SSls1]

No

 

[1320 Junkie]

Sounds like a fuel problem not ignition. If you are having spark issues u will get a blinking CEL then a hard code

 

[heatsoaked12]

should this be done while the car is running??

No, car off, battery disconnected, all coils disconnected then check ohms on each coil across the two pins where the plastic connector goes.

 

[03MUSCLE]

Thanks Guys

 

[03MUSCLE]

My car did this same thing when I up-graded to the TVS it was the fuel filter,but that was 6000 miles ago. Do u think its clogged allready?? The car dose not get drivin very much.

 

[Snoopy49]

CHECK THE SECONDARY COIL RESISTANCE FOR THE MISSING CYLINDERS
Note: Two adjacent coil towers share a common coil and are called a matched pair. The matched pairs are 1 and 4, and 2 and 3.

• Ignition OFF.
• Ignition coil pack disconnected.
• Disconnect spark plug wires from the coil pack.
• Measure the resistance of each matched pair.

Is the resistance between 8,000 and 9,600 ohms?

 

[03MUSCLE]

Why no code??If its coils or coil pack.

 

[nxhappy]

sometimes it will NOT flash a code if the COP is faulty. As suggested, the best thing to do is pull them (engine off) and check the ohms.

Have you checked the condition of your plugs?

Have you checked the fuel filter?

 

[03MUSCLE]

I'm gonna do the fuel filter first then coils and plugs. I'll keep u guys up-dated.

 

[SCGallo2]

The fix: http://www.svtperformance.com/forums/showthread.php?1094419-Up-date-bad-coils