echostatic
Turbooo
Hello all, it's been a good while, but I was hoping to get some feedback on a really annoying issue I've been having.
Sometimes I will get a miss under boost, if I push it past about 5psi or so. Sometimes, this will cause the check engine light to flicker, but store no code. On a couple of occasions, I have had a bad intake backfire as well. Bad enough once to blow the intake coupling apart at the MAF and filter once (blowing the honeycomb air smoother completely out of the MAF) and blowing the hose off the brake booster.
I don't know if this is related, but I've noticed some odd readings on the scanmaster. O2s read 000 or close to it when coasting, and sometimes when at a stop. When giving it a little gas, though, they will read up in the 700s or higher. Cross counts are, of course, very slow to increase when cruising or stop increasing completely when coasting. I'm not sure what is a normal amount of time for them to cycle back to 0 though. My BLM readings are also wacky. When sitting at a light, they tend to end up around 142, and can drop down to 115 when cruising.
Things I've tried replacing with no effect:
Spark plugs
o2 sensor
Coil pack
ECM
Chip
Some parts are fairly new, like the fuel pump (walbro 340) and spark plug wires (replaced in 2007). I didn't mind throwing some parts at it, since it needed new plugs anyway and I have no idea how old the coil pack was, but I'm running out of ideas.
And an unrelated question, would an intercooler not getting much airflow cause overheating in high 80 degree weather? No idea what's going on there.
Sometimes I will get a miss under boost, if I push it past about 5psi or so. Sometimes, this will cause the check engine light to flicker, but store no code. On a couple of occasions, I have had a bad intake backfire as well. Bad enough once to blow the intake coupling apart at the MAF and filter once (blowing the honeycomb air smoother completely out of the MAF) and blowing the hose off the brake booster.
I don't know if this is related, but I've noticed some odd readings on the scanmaster. O2s read 000 or close to it when coasting, and sometimes when at a stop. When giving it a little gas, though, they will read up in the 700s or higher. Cross counts are, of course, very slow to increase when cruising or stop increasing completely when coasting. I'm not sure what is a normal amount of time for them to cycle back to 0 though. My BLM readings are also wacky. When sitting at a light, they tend to end up around 142, and can drop down to 115 when cruising.
Things I've tried replacing with no effect:
Spark plugs
o2 sensor
Coil pack
ECM
Chip
Some parts are fairly new, like the fuel pump (walbro 340) and spark plug wires (replaced in 2007). I didn't mind throwing some parts at it, since it needed new plugs anyway and I have no idea how old the coil pack was, but I'm running out of ideas.
And an unrelated question, would an intercooler not getting much airflow cause overheating in high 80 degree weather? No idea what's going on there.
