Question about Cadillac Eldorado

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I have a 1994 Cadillac ETC (Northstar) and just recently had one of the ignition modules replaced because it was missing terribly. It started missing again shortly after having the module replaced and I noticed it idled rough with high (1000-1100 rpm's) at cold start. Sometimes when accelerating it would miss and hesitate as well. The other day, I pulled up to a stop light and it just quit. I restarted it and it was running extremely rough, then clouds of smoke poured out from the front, back and under the car. The darn thing leaks oil like a sieve so sometimes it will smoke from the engine compartment but this was much worse. I limped it home and it was obvious that there was an extreme power loss almost like the transmission was slipping. As I drove, the smoke became much less and it didn't seem as though it was coming from the exhaust. When I got home, I checked the transmission fluid and it was okay. I shut the engine off and checked the oil and it was okay. Then I looked under the car and the catalytic converter was glowing red hot! I just got done swapping out each ignition module with a new one and starting it after each move and it's still the same. Any suggestions? I thought it might be the timing chain had slipped but I thought I read that these are unable to slip... Thanks for any help, John

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  • njsunbunni Apr 04, 2009

    i had the same problem with my 1994 Cadillac eldorado. The mechanic replaced one, than two months later I was back again. So they had to replace another, till all 4 were replaced. Than 3 months later I was back to the shop. Well come to find out it was something under the 4 modulers that was causing the problems. After that it runs like a dream. I have had ALOT of repairs done on this car. Over $8000.00 over a 4 yr period. So if you have any other questions, i might be able to answer them, just by experiencing the repairs. Just yesterday i had the water pump replaced. Now for the second time, i am having to replace the exhaust system again. Do you have any information about replacing that?? If so email me @ with any helpful info. Hope I helped you out.



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I had the exact same problem. I was about to replace the cat then I relized that I actually had a vacuum hose leak. This made the car sound like a tank , smoke surrounded the car, and my cat was glowing. it was like the car was possesed. check your vacuum lines running to the throttle body before replacing cat. this is going to **** alot of people off but do your self a favor and get rid of the car. im sure we have people who will tell you that they have many miles but this car is an over engineered piece of ****. everything is 10 times harder to fix and **** goes out often.

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