BulletMaker
NAXJA Forum User
- Location
- Cascades, WA
I have a mostly stock 1990 XJ, CARB model. I just drove up to washington, and it's developed a bit of an issue that I still havn't quite been able to figure out. Under power (climbing a hill, or accelerating) I get a subtle yet annoying vibration. So far I've replaced the cap/rotor/plugs/wires but that didn't do it. I'm starting to wonder if maybe it's an issue in the driveline, or in the mechanics that support the engine.
I am kinda curious if maybe the change in california blend ethanol gasoline to PNW pure gas burned out my O2 or if it's strictly related to the support structure, my motor mounts are pretty old, but do seem to still be supporting the engine. I'm about to do my U-joints, and then maybe tackle the engine mounts.
Vibration seems to be principally related to engine load conditions. It isn't too noticable until you get over 30mph, and if just coasting you don't notice it.
Any thoughts?
I am kinda curious if maybe the change in california blend ethanol gasoline to PNW pure gas burned out my O2 or if it's strictly related to the support structure, my motor mounts are pretty old, but do seem to still be supporting the engine. I'm about to do my U-joints, and then maybe tackle the engine mounts.
Vibration seems to be principally related to engine load conditions. It isn't too noticable until you get over 30mph, and if just coasting you don't notice it.
Any thoughts?