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Hello, I have a 1997 Deville, 84k miles, beautiful car. It ran great on the test drive, but after getting it home, and sitting overnight, it didn't want to start the next morning. After cranking for awhile, it eventually, and reluctantly started, and ran great after warmup. I did notice that the exhaust seemed VERY rich. I have since replaced the plugs, wires, added seafoam to the gas tank twice, and it has more power, and runs GREAT after starting, however it still doesn't want to start right away after sitting overnight, but will restart just fine once it's been running, or after the initial start. I wondered if, before putting lots of new parts in hoping to correct the starting problem, the coils could be at fault, or, maybe more likely could the ignition control module be bad? Or should I consider something else could be at fault? By the way, the service engine soon light does work, however is not illuminated....but before I did the tune up, it did come on momentarily (twice) before I did the tune up and added the seafoam. Any advice would be helpful, I love this car! Thank you!
hi all. I got a sinking feeling when I went to leave work tonight. My eldo would not start. I have not had that happen in quite awhile so it surprised me. I tried it several times and every time it did nothing. no click, or crank, or anything. All accessories were fine battery volts were 12.2v It was not a theft issue. No security light or message. Then weirdly It just fired right up like it never happened. Thank god, otherwise dont know where I would be. I ran codes just to cover all bases pulled 3 codes PCM. U1152. history SDM U1255 history RFA U1064 history. No clue what any of these mean. I recently printed out the compete code list for the modules but am not sure where it is. I drive it every day. About 800-1000 miles a month. This is the first time It has done this. I do know the battery terminals are clean and tight but I will recheck them. I replaced the ground cables to the battery a few months ago and always keep an eye on things. I am sure someone here has some useful info. Thanks all