spinaldex
NAXJA Forum User
- Location
- Oregon City, OR
The haynes manual I have says it covers through 2001 XJs, but the diagrams for the vacuum lines they show haven't been updated since the '87, and it doesn't seem to match up with my engine. There's 3 nozzles on the side of the block (intake manifold?). When viewing it from the driver's side fender well you can see them all. The first (left) and last are plugged, but the middle one was open when I got my rig. With it unplugged the motor idles around 1100-1200 rpms but throttles up and down on occasion down to 900. Lots of air pushes through there and its loud enough to drown out the motor. Very occasionally with this setup, the vehicle will backfire when driving when the light turns green, but this is maybe 1/20 times.
When I plug it, the motor almost wants to die initially but then it adjusts and idles at around 800rpm and settles nicely. At first, I figured this was perfect and that was what I needed to do. But, after driving it for a couple days, having that hole plugged caused a few issues such as whenever the vehicle idles for more than 30 seconds after being warm it sputters and then dies until you restart the vehicle and then it takes another couple minutes before it does it again. The backfiring I indicated with it unplugged (above) does not happen when it is plugged.
Also, I should mention that I have 2 engine codes at the moment .. O2 sensor 1/2 & 1/1. I picked them up today and plan to put them in tomorrow night.
FYI, off topic, but AutoZone's computer said that my rig has SIX O2 sensors, 3 downstream and 3 upstream .. are they on crack or is that right? I could only see one each when I was looking around.
Anyway, thanks for any advice you may have. I can take a better picture when it stops hailing but for now I just drew on this vaccuum line diagram I found online about where the nozzles on the manifold are. Hope that helps =)
When I plug it, the motor almost wants to die initially but then it adjusts and idles at around 800rpm and settles nicely. At first, I figured this was perfect and that was what I needed to do. But, after driving it for a couple days, having that hole plugged caused a few issues such as whenever the vehicle idles for more than 30 seconds after being warm it sputters and then dies until you restart the vehicle and then it takes another couple minutes before it does it again. The backfiring I indicated with it unplugged (above) does not happen when it is plugged.
Also, I should mention that I have 2 engine codes at the moment .. O2 sensor 1/2 & 1/1. I picked them up today and plan to put them in tomorrow night.
FYI, off topic, but AutoZone's computer said that my rig has SIX O2 sensors, 3 downstream and 3 upstream .. are they on crack or is that right? I could only see one each when I was looking around.
Anyway, thanks for any advice you may have. I can take a better picture when it stops hailing but for now I just drew on this vaccuum line diagram I found online about where the nozzles on the manifold are. Hope that helps =)