Hello everyone. I browsed through all of the misfire threads but didn't see anything that related to my issue. In any case, my '98 GT was running great as it always does, when I suddenly hit a pothole pretty damn hard on the way home. At the next light, the car was very rough at idle and wanted to die. Shortly after, the CEL came on. I got home, put on my code reader and got a PO 306, as well as being told that the EVAP sensors "weren't ready for testing."
Being it was PO 306, I did some preliminary checks on cylinder six:
-made sure the plug wire was on the plug tightly
-made sure the plug wire was on the coil pack tightly
-made sure that the injector connector was on properly
-did a resistance check on the primary and secondary terminals on the passenger side coil pack. The primary side was fine, under 1.0 ohms, but the secondary side read high at 13K ohms when it's supposed to be 11K or less, between cylinders 1 and 6.
At that point I figured great, it's the coil pack, but then I checked the driver's side coil pack and it had the same resistance and readings on the primary and secondary terminals as the other one. If the coil packs were bad, wouldn't there be misfiring all over the engine? In any case, I don't have time to work on it now, but I'm figuring my next steps will be to test the coil pack to see if it's actually firing, the injector to see if it's actually pulsing, and the spark plug wire to see if it's broken somewhere inside of itself.
Do you guys have any suggestions on what I could look at next? Could the EVAP monitor "not being ready," according to my scanner, mean some other problem other than ignition and spark possibilities causing the misfire? I've never had to dig this deep into the car in this way before, so how do you guys go about testing the coil packs, injectors and spark plug wires?
By the way the car is bone stock and has about 115K miles on it. Thanks in advance...
Being it was PO 306, I did some preliminary checks on cylinder six:
-made sure the plug wire was on the plug tightly
-made sure the plug wire was on the coil pack tightly
-made sure that the injector connector was on properly
-did a resistance check on the primary and secondary terminals on the passenger side coil pack. The primary side was fine, under 1.0 ohms, but the secondary side read high at 13K ohms when it's supposed to be 11K or less, between cylinders 1 and 6.
At that point I figured great, it's the coil pack, but then I checked the driver's side coil pack and it had the same resistance and readings on the primary and secondary terminals as the other one. If the coil packs were bad, wouldn't there be misfiring all over the engine? In any case, I don't have time to work on it now, but I'm figuring my next steps will be to test the coil pack to see if it's actually firing, the injector to see if it's actually pulsing, and the spark plug wire to see if it's broken somewhere inside of itself.
Do you guys have any suggestions on what I could look at next? Could the EVAP monitor "not being ready," according to my scanner, mean some other problem other than ignition and spark possibilities causing the misfire? I've never had to dig this deep into the car in this way before, so how do you guys go about testing the coil packs, injectors and spark plug wires?
By the way the car is bone stock and has about 115K miles on it. Thanks in advance...