Hello, first let me say, I am not a professional, but I am experienced. So anyway my problem stems from misfire codes. Specifically a multiple random and cylinder four. I have all new spark plugs, gaped, and moved ignition coils around with no luck. I have new fuel injectors, and replaced the one on cylinder four. I have had the car for months, and I believe the fuel filter is pretty new. Maybe it was fuel pump. So I am convinced my problem comes from the vacuum system. The two parts in question, are located on the air filter housing. (I can unplug the VSV and EGR, get no new codes, and engine sounds the same) When I test the line off the throttle body, I have perfect vacuum presser (21 mg). Put that line back onto the VSV, and the exit line has 10 mg ( it is also a constant vacuum, never stops and receives a constant four volts, with no change). Hook that back on, and the line into the EGR has almost no vacuum. If I hold my finger on it for a while, it will barely pull after a minute. If I unhook the vacuum lines, it will run worse. The closest vacuum lines will stall the engine out.
1) is the vacuum pressure supposed to be at 21 through the whole system?
2) how can I make the computer turn these on? If I unplug both, I can start it, warm it up, idle it, full throttle it, and the engine never sounds different.
have the same problem?
Saturday, February 11th, 2017 AT 5:40 PM