Does the ECU use a cam or crank sensor to detect misfires?
I was told one of my cylinders, 7, is at 100psi instead of being over 200. I was talking to a indy, a good guy, and he asked if I was getting any misfire codes. He said that if my compression was that low then cylinder 7 shouldn't be firing or at least I should be getting random P0307 codes and I'm not.
He thinks the dealer's compression checks were bad and one cylinder had carbon or something on the valve that would clear as soon as the engine was started. He said that if my cylinder 7 comp is that low, actually below around 140, that I should be getting P0307s. Since I'm not, he said bring it in and he'll test it.
Here's what's weird. My compression was checked last summer. The car sat since. Whereas last summer with compression ok I needed valve stem seals to correct the oil consumption, now I need a new engine because of the low compression in cylinder 7 coupled with the valve stem seals. So if the compression is ok, I should be back to stem seals which are covered 100% instead of 60% for a new engine.
So that's my question to the group, should I be seeing random P0307 codes with compression that low in one cylinder?
Jerry
I was told one of my cylinders, 7, is at 100psi instead of being over 200. I was talking to a indy, a good guy, and he asked if I was getting any misfire codes. He said that if my compression was that low then cylinder 7 shouldn't be firing or at least I should be getting random P0307 codes and I'm not.
He thinks the dealer's compression checks were bad and one cylinder had carbon or something on the valve that would clear as soon as the engine was started. He said that if my cylinder 7 comp is that low, actually below around 140, that I should be getting P0307s. Since I'm not, he said bring it in and he'll test it.
Here's what's weird. My compression was checked last summer. The car sat since. Whereas last summer with compression ok I needed valve stem seals to correct the oil consumption, now I need a new engine because of the low compression in cylinder 7 coupled with the valve stem seals. So if the compression is ok, I should be back to stem seals which are covered 100% instead of 60% for a new engine.
So that's my question to the group, should I be seeing random P0307 codes with compression that low in one cylinder?
Jerry