DouglasVB
Rising Sun Member
Today I went to get my truck smogged here in California and it passed with flying colors EXCEPT the EGR valve isn't getting vacuum. My emissions were actually really good (HC: idle = 12ppm, 2500 rpm = 16 ppm. CO: idle = 0.00%, 2500 RPM = 0.01%) enough so that the guys at the shop were talking about how clean-burning my engine is.
The smog shop said that the EGR valve specifically was not getting vacuum. I believe they were testing the vacuum line from the BSVS valve at the EGR end of the line.
The truck is a 1986 model year and I have a 1988 model year Toyota field service manual but I believe the EGR system is basically the same between those years on a 22re.
It looks like it could be:
1. A plugged or degraded or leaking vacuum line (lines were replaced about 3 or 4 years ago)
2. A bad BSVS valve
3. A bad EGR vacuum modulator
When I visually inspected the components just now, the cap for the BSVS is missing. Dunno if that matters for its functionality at all or not. Otherwise everything else looks fine.
Does anyone have words of wisdom on the best way to go through and diagnose and fix this?
The smog shop said that the EGR valve specifically was not getting vacuum. I believe they were testing the vacuum line from the BSVS valve at the EGR end of the line.
The truck is a 1986 model year and I have a 1988 model year Toyota field service manual but I believe the EGR system is basically the same between those years on a 22re.
It looks like it could be:
1. A plugged or degraded or leaking vacuum line (lines were replaced about 3 or 4 years ago)
2. A bad BSVS valve
3. A bad EGR vacuum modulator
When I visually inspected the components just now, the cap for the BSVS is missing. Dunno if that matters for its functionality at all or not. Otherwise everything else looks fine.
Does anyone have words of wisdom on the best way to go through and diagnose and fix this?