I have done searches already on this and I know a few causes but I was wondering if I could get more detailed causes. For example, instaed of an exhaust leak, you could say the crossover pipe to header connection or instead of vacuum leak, it would be the vauum block gasket being bad. Why I ask is that I have been chasing a high BLM problem (150-151 at idle). I have to be missing something. Checked the headers for cracks when I pulled them off (Poston headers), pulled the crossover off and back on what seems like a thousand times. I was certain it was a crossover leak but I am not so sure anymore.
One question I have is will the BLM's be high on a vacuum leak and on an exhust leak? To me a vacuum leak is unmetered air which would cause it to go lean and an exhaust leak would cause the O2 sensor to detect more oxygen in the exhaust. I would think only the exhaust leak would cause high BLM's. I think I just confused myself!
Like I said before, I have searched and found some things on high BLM causes. What I plan on doing this weekend is swap out MAF's, check my grounds again, vacuum lines. I sprayed carb cleaner on all vacuum line connections and did not hear the RPM's go up any. I heard that the RPM's going up might not happen and I have to watch the BLM's on the scanmaster when I do this. Anything else I should do? BTW, CC's are good on the O2 sensor. I hate asking questions that have been asked but I had to do it anyways.:redface:
One question I have is will the BLM's be high on a vacuum leak and on an exhust leak? To me a vacuum leak is unmetered air which would cause it to go lean and an exhaust leak would cause the O2 sensor to detect more oxygen in the exhaust. I would think only the exhaust leak would cause high BLM's. I think I just confused myself!
Like I said before, I have searched and found some things on high BLM causes. What I plan on doing this weekend is swap out MAF's, check my grounds again, vacuum lines. I sprayed carb cleaner on all vacuum line connections and did not hear the RPM's go up any. I heard that the RPM's going up might not happen and I have to watch the BLM's on the scanmaster when I do this. Anything else I should do? BTW, CC's are good on the O2 sensor. I hate asking questions that have been asked but I had to do it anyways.:redface: