dkedrowitsch Posted March 9, 2005 Report Share Posted March 9, 2005 To make a long story short I got a 1992 Eldorado 4.9 PFI for practically free. It has 172K miles on it in physically near perfect shape and brand new tires. The interior needs some cleaning and the Bose Gold system just squeals at me when I turn it on but this is minor stuff I can easily take care of. I was given the car with the understanding that it doesn’t idle and it’s not drivable. I really like the car and would like to straighten it out and make it my every-day driver when the weather gets nicer. I’ve never owned anything this nice! Here is what’s happening…. The battery was dead so I hooked up a jumper pack and the car fired right up and ran smooth. It also ran smooth in drive. After a minute or two it started to idle down then it simply quit without a stumble or hiccup. Two things I noticed while it was running was the display said it was in "Set Timing Mode" between telling me all systems were OK and to press the brake to put in drive. The other thing I noticed was the tach wasn't working. I couldn't get the car to turn over again because the jumper pack wasn't charged enough to start a warm V8 so I gave up and went home. Two days later I put a fresh battery in it and tried again. This time, it was hard to start and when it finally did, it ran like crap and was cutting out and smelled like it was running rich or lean...couldn't tell. I was getting messages on the display about engine overheating but I just started it so it was impossible. I also noticed that this time the tach was working. The SES light was also erratically flashing. I grabbed the snap-on scanner and ran the drivability scanner program and there were all kinds of codes stored like both banks running lean, temp sensor low or open, and the display on the dash said to service the ride control. So I used the scanner to cleared the codes, shut the car off, and turned the key back on. The SES no longer signaled there was a code, but the car would no longer start. It cranks fine and tries to start but won’t “catch”. It almost sounds like it’s not getting enough spark or the cold start function isn’t working. Last night was much too windy and cold for me so I gave up. So, this is where I’m at with it. I don’t have a service manual and this is my first Caddy. I’m pretty familiar with GM EFI, TBI and TPI…I’ve customized my own fuel trim tables to adjust for camshaft changes etc. But I’m totally new to this early 90’s Caddy SFI system. If I had to take a guess I’d say it might be a bad ground, bad ignition module AND bad temp sensor, or a bad PCM. Tonight I plan to take a closer look if it’s not so frigid out so maybe I’ll have some more info later tonight. I’d like to try replacing the temp sensor first, perhaps it doesn’t know the engine is cold and therefore isn’t engaging the cold start injector or firing all 8 at the same time or whatever it does for cold start (I’m not sure how this caddy EFI stuff works!). In the meantime, hopefully someone can point me in the right direction! Thanks!! Dieter Link to comment Share on other sites More sharing options...
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