I have a 91 Cadillac sedan Deville ignition doesn't work turns freely back n forth

Marvin

• 85242 Answers
• Posted on Oct 17, 2008

SOURCE: 63 cadillac sedan deville heater core removal and installation instructions

I do think you have to pull he dash, for that you will need a manusl, try ebay for used factory manuals, I have had good luck getting them there for all my cars.

SOURCE: I need the firing order on a 1996 Cadillac Sedan Deville

Firing order 1-2-7-3-4-5-6-8 ..............1-3-5-7 back of engine near fire wall...........2-4-6-8 front of near radiator

SOURCE: No heat in 91 Cadillac Sedan Deville

I would beleive more that you have build up in the heater core. Try taking loose the heater hoses from the block and use a water hose to spray into one of the hoses letting it come out the other hose then switch hoses with the water hose and keep reverseing for 2/3 times each hose. sounds like stop leak may have been used in a prior time and may be blocking water flow.

Good luck,
Lugnut61

SOURCE: cannot locate sedan deville fuel filter

Under vehicle, driver side, below seating area, front of fuel tank, mounted on chassis in fuel lin.

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SOURCE: 1999 cadillac sedan deville won't fire to start

you need to figure out if your missing spark at the plgs,or check fuel pressure at fuel rail,you'll need at least 55psi of fuel pressure,but if you have had no luck spraying the throttle body,your probably missing spark