alpha1r
Probationary Member
- 7
- 0
- Feb 25, 2012
-
Vancouver,
BC, Canada
Hi, I wasnt able to post in the other forums because of permissions, so I figure I do it here.
I've had the car for about 3 months now. And lately it hasn't been able to boost past 10 psi and just stumbled. Checked the plugs last week and they were gapped to .50. I gapped to .28 and the car seemed fine!
Just last weekend the car felt like it was misfiring and and stumbled lots on idle.
I pulled over, and noticed the # 2 plug wire was popped up a bit. I suspected the spark plug but was completely seized.
Got the car towed home and was able to carefully remove the plug. The tip was completely gone as I suspected, and some of the threads were fuzed together.
(bad focus from the iPhone)
I was able to carefully remove the seized plug and got all new plugs in but the car still idled really bad.
Some things I did to try and diagnose:
- Replaced all plugs
- Replaced Coil Pack & Plug Wires
- Checked MAF
- Checked ISC
- Replaced fuel filter
- Checked ECU (Caps look brand new, but had some burn marks on the daughter board)
- Checked fuel injectors with stethoscope
Finally did a compression test and everything tested 190 across the board. Unfortunately #2 was 0.. no compression at all
New Plugs when pulled out for compression test. # 2 was completely clean.
Im suspecting a bent valve, as the exhaust doesnt blow blue so it must not be rings / piston.
Im not quite sure what do next. Pretty new to this car.
- Should I perform a leak down test? (no air compressor or tester)
- If it is the valves, do I need to pull out the head to replace, or just the cams and valve cover?
- Any other possibility that it could be something else besides the valve? Cracked head?
Here are the pictures from the ECU - sorry for the bad pics couldn't get the phone to focus properly.
I've had the car for about 3 months now. And lately it hasn't been able to boost past 10 psi and just stumbled. Checked the plugs last week and they were gapped to .50. I gapped to .28 and the car seemed fine!
Just last weekend the car felt like it was misfiring and and stumbled lots on idle.
I pulled over, and noticed the # 2 plug wire was popped up a bit. I suspected the spark plug but was completely seized.
Got the car towed home and was able to carefully remove the plug. The tip was completely gone as I suspected, and some of the threads were fuzed together.
(bad focus from the iPhone)
You must be logged in to view this image or video.
I was able to carefully remove the seized plug and got all new plugs in but the car still idled really bad.
Some things I did to try and diagnose:
- Replaced all plugs
- Replaced Coil Pack & Plug Wires
- Checked MAF
- Checked ISC
- Replaced fuel filter
- Checked ECU (Caps look brand new, but had some burn marks on the daughter board)
- Checked fuel injectors with stethoscope
Finally did a compression test and everything tested 190 across the board. Unfortunately #2 was 0.. no compression at all
New Plugs when pulled out for compression test. # 2 was completely clean.
You must be logged in to view this image or video.
Im suspecting a bent valve, as the exhaust doesnt blow blue so it must not be rings / piston.
Im not quite sure what do next. Pretty new to this car.
- Should I perform a leak down test? (no air compressor or tester)
- If it is the valves, do I need to pull out the head to replace, or just the cams and valve cover?
- Any other possibility that it could be something else besides the valve? Cracked head?
Here are the pictures from the ECU - sorry for the bad pics couldn't get the phone to focus properly.
You must be logged in to view this image or video.
You must be logged in to view this image or video.
Last edited:
