I'm trying to determine what the people at a smog inspection station changed in my vehicle's engine which created ported vacuum within the engine's block.
About 5 years ago, I took my 1979 Cherokee -- with a 5.9 liter engine -- to a station to get a smog inspection. (This is in California.) The people at the station made some modifications in order to get it to pass the inspection. For example, they installed an extra PCV valve to the hose between the oil filler tube and the air cleaner housing. That's a no-no in California for a smog inspector to make such changes to a vehicle while performing a smog inspection, but I was happy that it passed the inspection. However, now it appears that there is ported vacuum within the engine block. If the engine is running and I remove the oil filler tube cap, the engine dies.
The smog inspection station is no longer in business, so I can't ask them what they changed to create this situation. And the engine runs fine with the change(s). But this situation shouldn't exist. Can anyone provide any ideas about what they might have done to create this situation?
Thanks,
CBEwing
About 5 years ago, I took my 1979 Cherokee -- with a 5.9 liter engine -- to a station to get a smog inspection. (This is in California.) The people at the station made some modifications in order to get it to pass the inspection. For example, they installed an extra PCV valve to the hose between the oil filler tube and the air cleaner housing. That's a no-no in California for a smog inspector to make such changes to a vehicle while performing a smog inspection, but I was happy that it passed the inspection. However, now it appears that there is ported vacuum within the engine block. If the engine is running and I remove the oil filler tube cap, the engine dies.
The smog inspection station is no longer in business, so I can't ask them what they changed to create this situation. And the engine runs fine with the change(s). But this situation shouldn't exist. Can anyone provide any ideas about what they might have done to create this situation?
Thanks,
CBEwing
