OK... so this last weekend I installed a reman distributor in my '96XJ. This was the first time I've done a dizzy install... and for the most part all went well.
When I fired up the XJ she seemed to run just fine. Took it for a long drive and everything seemed fine... no backfires, no stumbles, et...
... move foreward a week. My gas mileage has been pretty LOUSY for my XJ before the dizzy install and now after a week having the new Dizzy, Mopar Wires and NGK plugs my mileage this AM was 13.9 mpg... before installing a new Radiator last month, Dizzy, tune-up, etc... I averaged about 20 mpg... so WHAT GIVES???
One other thing is about 1 month back I got a new set of tires... 30x9.5/15s that replaced my old hard 235/75R15s... not much difference in size, but a little larger bit of rubber.
I also noticed that my temp guage rarely reads over 180 so I'm wondering if I'm running in continual 'cold cycle' loop and the computer is never running like it's supposed to. I have a nice laser thermometer and can measure temps, but not sure where to check in the engine bay to make sure my guage is accurate, or if it's just off like a lot of OE products are.
... ok, back to my original post. IF I had my dizzy off a tooth (forward or back) would it be very noticeable and would I get missing and a backfire? I figured I would and since I didn't I assumed all is well w/that install. However w/the lousy fuel mileage I'm wondering.
(Also... I replaced my front O2 sensor about 20-30K miles back and that improved the performance of my XJ as it had been stumpling and missing...)
I also ran a can of Seafoam thru the intake about 3 weeks back so I'm hoping that didn't screw up my O2 sensor or something else.
... I'm just shaking my head at the TERRIBLE fuel mileage I've been getting since this only started happening about 1 month back.
Thanks for any and all tips or suggestions.
When I fired up the XJ she seemed to run just fine. Took it for a long drive and everything seemed fine... no backfires, no stumbles, et...
... move foreward a week. My gas mileage has been pretty LOUSY for my XJ before the dizzy install and now after a week having the new Dizzy, Mopar Wires and NGK plugs my mileage this AM was 13.9 mpg... before installing a new Radiator last month, Dizzy, tune-up, etc... I averaged about 20 mpg... so WHAT GIVES???
One other thing is about 1 month back I got a new set of tires... 30x9.5/15s that replaced my old hard 235/75R15s... not much difference in size, but a little larger bit of rubber.
I also noticed that my temp guage rarely reads over 180 so I'm wondering if I'm running in continual 'cold cycle' loop and the computer is never running like it's supposed to. I have a nice laser thermometer and can measure temps, but not sure where to check in the engine bay to make sure my guage is accurate, or if it's just off like a lot of OE products are.
... ok, back to my original post. IF I had my dizzy off a tooth (forward or back) would it be very noticeable and would I get missing and a backfire? I figured I would and since I didn't I assumed all is well w/that install. However w/the lousy fuel mileage I'm wondering.
(Also... I replaced my front O2 sensor about 20-30K miles back and that improved the performance of my XJ as it had been stumpling and missing...)
I also ran a can of Seafoam thru the intake about 3 weeks back so I'm hoping that didn't screw up my O2 sensor or something else.
... I'm just shaking my head at the TERRIBLE fuel mileage I've been getting since this only started happening about 1 month back.
Thanks for any and all tips or suggestions.
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