Note: the car now has new dist. Cap, , dist. Rotor ,spark plug wires, spark plugs ( oem spec Bosch ). I've taken out and swapped injectors too. Idle air controller? Could this really cause a misfire? From what I've heard this is more of an idle issue. Car idles at 800 but I've heard it skip a fire b...

Okay maybe someone can throw in a little advice...... So I have these two issues. Secondary air pump code p0401 but the pump runs on cold starts. Could this be a faulty o2 sensor not recognizing the change in oxygen in the exhaust? Isn't this what causes the p0401 code to set off? Misfire cyl 4/5 Ra...

I've checked the plugs. They are ngk but look pretty clean, no carbon, not wet..... Im going to swap out distributor cap/rotor right now But unfortunately I still have two opposite codes. So I have to keep returning to get an obd to see any progress on either the air pump side, or the misfire side. ...

I've got a 98 v70 T5. My obd2 scan tells me codes P0401 Secondary air pump malfunction , P304 cyl 4 misfire , P305 cyl 5 misfire and then P300 random misfire. I recently replaced a broken vacuum line and checked the pump and pump works good. I have heard e pump running three days in a row, just befo...