Spark test on #8
#1
Spark test on #8
So, I have an annoying misfire on #8. It started as an occasional slight miss during acceleration, and now it results in major roughness and flashing SES. There is no coolant loss, overheating or tail smoke.
I hooked up an inline spark light this morning and let it idle for a couple mins. No codes and light seemed to flash ok. Revved it a few times at 1500-2000rpm for about 5 sec each. No lights and it had a minor vibration, but nothing too bad. Tried to go for a short drive, but the stumbling and flashing SES started right away so I went back and parked it.
A few hours later, I put some Redline SL-1 in just to see if it might be injector related and went for a drive. Did fine until I got to temp (190ish). Started flashing the SES and running really rough. Used some welding gloves to hook the test light up and took a vid.
Is this a normal fire frequency?
Note: dark garage so it looks like a blank screen. Watch for the little orange flash in the middle.
I hooked up an inline spark light this morning and let it idle for a couple mins. No codes and light seemed to flash ok. Revved it a few times at 1500-2000rpm for about 5 sec each. No lights and it had a minor vibration, but nothing too bad. Tried to go for a short drive, but the stumbling and flashing SES started right away so I went back and parked it.
A few hours later, I put some Redline SL-1 in just to see if it might be injector related and went for a drive. Did fine until I got to temp (190ish). Started flashing the SES and running really rough. Used some welding gloves to hook the test light up and took a vid.
Is this a normal fire frequency?
Note: dark garage so it looks like a blank screen. Watch for the little orange flash in the middle.
#3
#4
That makes it even more strange that it would only blink once every couple seconds
Last edited by pinkytoe69; 07-05-2013 at 04:23 PM.
#5
It has been suggested I do a compression test.
Online opinions say that the Craftsman tester is a good unit and as cheap as one should go. At $65 it isnt too bad a hit, but I would rather avoid buying something that may get used a handful of times tops.
Does anyone have opinions on the quality of a loner unit from the auto parts stores?
Online opinions say that the Craftsman tester is a good unit and as cheap as one should go. At $65 it isnt too bad a hit, but I would rather avoid buying something that may get used a handful of times tops.
Does anyone have opinions on the quality of a loner unit from the auto parts stores?
Last edited by pinkytoe69; 07-07-2013 at 05:40 PM.
#6
#7
Have you verified your plug, wire and coil pack are good?
Did you check out the first video I posted of the spark light?
#8