I have been dealing with a CEL for a few months now and thought I would post it up for the professionals.
Consistently get, p0303,p0304,p0300 on my '99 xj, 4.0, 0630 head, thing runs great, just low on power.
After chasing down literally every sensor I had a leak-down done which resulted in,
Cyl1 - 145
Cyl2 - 149
Cyl3 - 50
Cyl4 - 55
Cyl5 - 150
Cyl6 - 150
Shop said exhaust valves, they would do valve job for $1600 :wow:
My vacuum diagnosis tells me bad rings but: 1) plugs are dry as a bone, 2) no smoke out the exhaust whatsoever.
My question is this, when I pull the head to have it redone is there a way I can check if the rings in 3 and 4 are still OK?
thanks :wave:
Consistently get, p0303,p0304,p0300 on my '99 xj, 4.0, 0630 head, thing runs great, just low on power.
After chasing down literally every sensor I had a leak-down done which resulted in,
Cyl1 - 145
Cyl2 - 149
Cyl3 - 50
Cyl4 - 55
Cyl5 - 150
Cyl6 - 150
Shop said exhaust valves, they would do valve job for $1600 :wow:
My vacuum diagnosis tells me bad rings but: 1) plugs are dry as a bone, 2) no smoke out the exhaust whatsoever.
My question is this, when I pull the head to have it redone is there a way I can check if the rings in 3 and 4 are still OK?
thanks :wave: