Replaced thermostat and car still runs hot after going about two miles
You have a Blown Head Gasket.. It is a 4.6 Northstar Engine. Very Common around 90-105K
SOURCE: rough idle after warm up
I'd take a look at the temp sender...the engines computer may be
"thinking" the engine is still cold when it's not. That would cause it
run rich (and rough) after it's warmed up. Generally the sender can be
tested with an ordinary volt/ohmeter but you will need the
specifications available in most inexpensive manuals. As with any
complicated electronics system, I can only give you my best guess,
without the luxury of doing any hands-on testing myself.
Good Luck!!
SOURCE: 1997 cadillac eldorado running hot
Sometimes a vacuume leak can cause overheating problems too.
SOURCE: Where is the location of the cabin air filter
It'll be located under your hood underneath the plastic shroud at the base of your window. You'll need to remove a couple of the retaining clips in order to lift the shroud up in order to access the filter. All you need to do is pull the old filter out once you have enough room and slide the new on in
SOURCE: Oil disappearing with no visible leaks and engine not using oil.
Check out this thread and take your Caddy for a couple of Wide Open Throttle runs on the Interstate. Clears out the carbon buildup on the rings that is causing oil blowby.
http://townhall-talk.edmunds.com/direct/view/.f1078f6/0
SOURCE: need a wiring electrical diagram for 98 cadilac
The Auto Parts stores here carry Chilton's or Haynes repair manuals that usually have wiring diagrams in the back.
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