Hi all,
I have been trying to get the motor tuned up and after running down a bunch of issues I seem to have found another one. In this de-smogged 1F, the crankcase via PCV valve was plumbed into the intake spacer underneath the carb. I believe this is how it was before the rebuild, though I could be mistaken. Thats how I have it now. The motor starts up, runs up and down the street to seat the rings (and backfires explosively off-throttle decelerating) and idles OK cold and warm, though something isnt right. I have a wideband O2 sensor and can see AFRs in 15-16 range when idling warm. Backing out the idle mixture screw only helps to a point but never gets warm idle AFRs into the 13-14s. The old lean-drop idle tuning just wasnt working properly, the idle mix screw wasnt really effecting mixtures, and it was rebuilt by me and then by TLC. Also vacuum never got above 7" at 700 rpm idle...
I suspect a vacuum leak somewhere and even made a smoke machine to try and chase it down...no dice. Checked compression...150+ on all cylinders...I had pinched off the various vacuum hoses without any changes before, but today tried again and voila...the hose from the PCV to the carb spacer, when pinched off, would eventually make the motor die. I have seen a bunch of threads on the PCV and getting a billet OEM one, which I will try and chase down in Canada...
I have a couple of questions...
1. Should I plug up the intake spacer and route the PCV to the intake before the throttle, like to the airbox? Does it need such a direct vacuum into the manifold or can I relocate the PCV to the airbox?
2. I will order a new OEM PCV and grommet (both these on there are new from SOR)
3. Is there something else going on I am not catching onto?
Thanks!
I have been trying to get the motor tuned up and after running down a bunch of issues I seem to have found another one. In this de-smogged 1F, the crankcase via PCV valve was plumbed into the intake spacer underneath the carb. I believe this is how it was before the rebuild, though I could be mistaken. Thats how I have it now. The motor starts up, runs up and down the street to seat the rings (and backfires explosively off-throttle decelerating) and idles OK cold and warm, though something isnt right. I have a wideband O2 sensor and can see AFRs in 15-16 range when idling warm. Backing out the idle mixture screw only helps to a point but never gets warm idle AFRs into the 13-14s. The old lean-drop idle tuning just wasnt working properly, the idle mix screw wasnt really effecting mixtures, and it was rebuilt by me and then by TLC. Also vacuum never got above 7" at 700 rpm idle...
I suspect a vacuum leak somewhere and even made a smoke machine to try and chase it down...no dice. Checked compression...150+ on all cylinders...I had pinched off the various vacuum hoses without any changes before, but today tried again and voila...the hose from the PCV to the carb spacer, when pinched off, would eventually make the motor die. I have seen a bunch of threads on the PCV and getting a billet OEM one, which I will try and chase down in Canada...
FJ62 PCV valve
It's not in the same location as the FJ60's, apparently, and I can't find it. I thought it was on top of the valve cover, in the rear, but this piece doesn't seem to be the correct size. Can anyone give a dummy some help? :bounce: Thanks
forum.ih8mud.com
PCV valve
I'm trying to chase down vacuum leaks and I'm new to the 2F world. My PCV valve is loose fitting coming out of the metal elbow, when I spray carb cleaner on it engine speeds up, is that normal to be loose? Sent from my iPhone using IH8MUD
forum.ih8mud.com
I have a couple of questions...
1. Should I plug up the intake spacer and route the PCV to the intake before the throttle, like to the airbox? Does it need such a direct vacuum into the manifold or can I relocate the PCV to the airbox?
2. I will order a new OEM PCV and grommet (both these on there are new from SOR)
3. Is there something else going on I am not catching onto?
Thanks!