Low Ignition Coil reading?
06-07-09, 11:29 AM
#1
Lexus Test Driver
Thread Starter
Low Ignition Coil reading?
So for sometime now I have been smelling what smells like unburnt fuel when I start the car up and cold days I can see a good amount of exhaust from the tail pipes. After reading a few prior posts I decided to test my Ignition Coil and I think my coil is either dying or I tested it wrong.
I followed the manual for testing the coil and the resistance was in range for the secondary coil resistance but not for the primary coil resistance.
Primary Coil Resistance: 000.6 Ohm (Cold 0.21-0.33 Hot 0.27-0.39)
Secondary Coil Resistance: 9.32 Kohm (Cold 0.64-11.1 Hot 8.2-13.0)
The thing is my car is not miss firing or idling odd but from a dead stop the car seems powerless and at higher rpms it is slow to climb. So with these readings what other symptoms should I be having if any, such as bad acceloration, etc....?
I followed the manual for testing the coil and the resistance was in range for the secondary coil resistance but not for the primary coil resistance.
Primary Coil Resistance: 000.6 Ohm (Cold 0.21-0.33 Hot 0.27-0.39)
Secondary Coil Resistance: 9.32 Kohm (Cold 0.64-11.1 Hot 8.2-13.0)
The thing is my car is not miss firing or idling odd but from a dead stop the car seems powerless and at higher rpms it is slow to climb. So with these readings what other symptoms should I be having if any, such as bad acceloration, etc....?
Last edited by Sup2jzgte; 06-09-09 at 04:00 PM.
06-07-09, 12:13 PM
#2
Ok so were all the coils doing this? Or just 1 or 2? Did you do them both cold and hot? Whatever the case may be make sure you're getting fire out of the coil/s in question, that's the first thing to do.
Second make sure you have the Ohms on the correct setting on your voltage reader. I know that sounds like a really juvenile mistake but it happens all the time.
The 2j is a pretty amazing motor. You can drive around on 5 cylinders and it can still pull like you wouldn't believe. That being said, it doesn't have to be blatantly obvious that something is out of whack unless you yourself pay really close attention to how your motor is reacting all time. Answer those questions with the results and post em up.
Second make sure you have the Ohms on the correct setting on your voltage reader. I know that sounds like a really juvenile mistake but it happens all the time.
The 2j is a pretty amazing motor. You can drive around on 5 cylinders and it can still pull like you wouldn't believe. That being said, it doesn't have to be blatantly obvious that something is out of whack unless you yourself pay really close attention to how your motor is reacting all time. Answer those questions with the results and post em up.
06-07-09, 12:48 PM
#3
Lexus Test Driver
Thread Starter
Ok so were all the coils doing this? Or just 1 or 2? Did you do them both cold and hot? Whatever the case may be make sure you're getting fire out of the coil/s in question, that's the first thing to do.
Second make sure you have the Ohms on the correct setting on your voltage reader. I know that sounds like a really juvenile mistake but it happens all the time.
The 2j is a pretty amazing motor. You can drive around on 5 cylinders and it can still pull like you wouldn't believe. That being said, it doesn't have to be blatantly obvious that something is out of whack unless you yourself pay really close attention to how your motor is reacting all time. Answer those questions with the results and post em up.
Second make sure you have the Ohms on the correct setting on your voltage reader. I know that sounds like a really juvenile mistake but it happens all the time.
The 2j is a pretty amazing motor. You can drive around on 5 cylinders and it can still pull like you wouldn't believe. That being said, it doesn't have to be blatantly obvious that something is out of whack unless you yourself pay really close attention to how your motor is reacting all time. Answer those questions with the results and post em up.
06-07-09, 01:28 PM
#4
To my understanding the SC300 (2jzge) only has one coil, am I mistaken? Your right about the settings on the ohm meter, but I did make sure it was on OHM's. As for the performance it feels pretty damn sluggish to say the least lol. Last August I change the plugs, wires, Distributor cap rotor.
06-07-09, 03:31 PM
#5
Lexus Test Driver
Thread Starter
06-07-09, 03:59 PM
#7
Lexus Test Driver
Thread Starter
Sadly I cant but I can get a brand new one for $50. I'm just curious if some of the issues I'm having could be cause by the coil. My main issues are as follows:
Sluggish (from a dead stop the RPM's need to hit around 2k for the speed register on the tach)
Somewhat Low Idle (around 400 or so)
When car reaches 4k rpm it does not move like I think it should.
TERRIBLE gas mileage about 15 miles to the gallon
Holding the key down abit longer to start the car after sitting for over 12 hours.
Other than that the car is pretty good lol. I highly doubt that the coil is causing ALL the issues..............but then again it could be playing into them, think?
Sluggish (from a dead stop the RPM's need to hit around 2k for the speed register on the tach)
Somewhat Low Idle (around 400 or so)
When car reaches 4k rpm it does not move like I think it should.
TERRIBLE gas mileage about 15 miles to the gallon
Holding the key down abit longer to start the car after sitting for over 12 hours.
Other than that the car is pretty good lol. I highly doubt that the coil is causing ALL the issues..............but then again it could be playing into them, think?
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06-07-09, 07:00 PM
#8
Sadly I cant but I can get a brand new one for $50. I'm just curious if some of the issues I'm having could be cause by the coil. My main issues are as follows:
Sluggish (from a dead stop the RPM's need to hit around 2k for the speed register on the tach)
Somewhat Low Idle (around 400 or so)
When car reaches 4k rpm it does not move like I think it should.
TERRIBLE gas mileage about 15 miles to the gallon
Holding the key down abit longer to start the car after sitting for over 12 hours.
Other than that the car is pretty good lol. I highly doubt that the coil is causing ALL the issues..............but then again it could be playing into them, think?
Sluggish (from a dead stop the RPM's need to hit around 2k for the speed register on the tach)
Somewhat Low Idle (around 400 or so)
When car reaches 4k rpm it does not move like I think it should.
TERRIBLE gas mileage about 15 miles to the gallon
Holding the key down abit longer to start the car after sitting for over 12 hours.
Other than that the car is pretty good lol. I highly doubt that the coil is causing ALL the issues..............but then again it could be playing into them, think?
06-07-09, 07:16 PM
#9
Lexus Test Driver
Thread Starter
As for o2 sensors I changed bank 1 and 2, the only one thats left is the one under the car.
HG is def a possibility because when I was changing my exhaust manifold I found what looks like it could be a leak in the HG, but I'm not sure, once I get more time I will do a compression test. Here is a picture of what I'm refering to
The MAF I'm going to try and clean tomorrow.
Now on a side note, if that is a leak in the HG do you have any experience with head Gasket seals as a tempory fix?
06-07-09, 07:37 PM
#11
Lexus Test Driver
Thread Starter
06-09-09, 04:49 PM
#13
Lexus Test Driver
Thread Starter
Well I got my new ignition Coil in today and I tested it before installing and here are numbers I got
Primary .26
Secondary 8.6
Both of which fall in range in the manual, so I give an update on if I notice any differences sometime tonight or tomorrow
Primary .26
Secondary 8.6
Both of which fall in range in the manual, so I give an update on if I notice any differences sometime tonight or tomorrow
Last edited by Sup2jzgte; 06-09-09 at 05:01 PM.
06-10-09, 04:43 AM
#14
Lexus Test Driver
Thread Starter
Just an update
changing the coil helped my low idle a bit and I'm also getting better gas mileage (4 MPG more) at this point. The car does seem to have somewhat more power but still seems under powered and sluggish.
My next adventure is going to be changing the fuel filter.................HOPEFULLY I dont strip the nut
changing the coil helped my low idle a bit and I'm also getting better gas mileage (4 MPG more) at this point. The car does seem to have somewhat more power but still seems under powered and sluggish.
My next adventure is going to be changing the fuel filter.................HOPEFULLY I dont strip the nut
