I am troubleshooting my PO401 code and I have a question concerning the amount of vacuum that I am getting out of my intake manifold where the 2 lines from the EGR modulator plug into. I have run throuth the testing accoring to the FSM and I have come to the conclusion that either the VSV is bad or that the vacuum ports in my intake manifold are blocked. How much vacuum should be at those two ports? I have great vacuum at what was called the gas valve on a FJ40 so it makes me think that I may have clogged intake ports.
Please chime in with any info.
Thanks
Scott
Please chime in with any info.
Thanks
Scott