Question about 1998 Cadillac DeVille

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This morning on my drive to work, my 1998 Cadillac Deville began running rough at about 50-55 mph. I did not push it higher in fear of doing more damage. It does have a known oil leak, but I do keep adding oil. I am wondering if this is an engine problem or could I just need an alignment?

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  • Caprice Thompson
    Caprice Thompson Feb 07, 2014

    I put in one quart and it puts it in the correct range on the dipstick. And I believe all is tightened up. I want to add that it is not overheating as I see mention of overheating when trying to troubleshoot.

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  • 35 Answers

Since it is consuming oil,time for overhaul.if it was alighnment then it would start at 20-30mph

Posted on Feb 07, 2014

Testimonial: "By overhaul, do you mean a 'tune-up'? Do you feel like this may be an engine issue?"

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SOURCE: I keep getting a stop engine low oil pressure

Just wondering if you put in the correct amount of oil and tightened everything back up properly...

Posted on Sep 09, 2009

Kravcar
  • 192 Answers

SOURCE: 1998 Cadillac Deville overheating

The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.

Posted on Mar 28, 2010

  • 1 Answer

SOURCE: 1998 Cadillac Deville low refrigerant a/c

I have a 1999 Cadillic Deville. The low Frefrigerant indicater come on after about 15 minutes of disconnecting the battery power. Each Time I reset the power the air conditioner comes back on for a while then goes out. I have taken it into the local auto repair place and they find no problem with the unit.
Could this be a intermittent connection to the computer. They have replaced both sencors and the problem persists. Where is the computer located on the car that handles this AC sensor message?

Posted on Jul 14, 2010

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