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  2. BodybyFisher

    Mailbag: A/C on causes Overheating

    This appears to be an intermittent code because it is history. Why was this sensor replaced? Did you test the old sensor with an ohm meter for accuracy and proper calibration with an ohm meter? The resistance and temp parameters are in the FSM. What was the connector like when you replaced it? Did the connector feel loose when it was removed and replaced? Is there corrosion on the connector contacts? The description of this code: The DTC detects a CONTINUOUS open or short to HIGH in the ECT signal circuit or the ECT sensor. I suspect that the message "ENGINE HOT - AC OFF" is in fact because the AC is ON.... and that you are actually getting similar conditions with the AC OFF, but because the AC is OFF, you don't get this message. You seem to be getting a FALSE message. I have a feeling that your TEMP gauge is inaccurate and probably HIGH. Do not ignore this code, get this fixed, you will NEVER know if in fact you are overheating. Check the connector at the ECT sensor for corrosion, looseness and that it is properly connected. Check the wiring all the way up as far as you can go for burns and breaks Also, show us a photo of the gauge with the AC off. Notice if you see the gauge jumping up to HOT while you drive. Let us know what you can find.
  3. I am a huge fan beginning with 91 obd1 4.9 I just spent 3 months working on an 89 350 ci TBI system, all the controls were there but the interface was antiquated as it flashed codes like my oil burner lol
  4. I am not a fan of many 90s vehicles, even early 90s. Only what was left of the 70s was good in the 80s. There were many many ugly cars in the 80s, quite a few had trouble because of all the emissions crap they couldnt keep up with.
  5. I was 20 in 73, people were dying from sucking fuel into their lungs
  6. Yesterday
  7. Wow. Ya know, I grew up in Detroit and I don’t remember running out of gas or the fuel rationing lines you see pictures of. Of course I was 5 in 1973. And my family owned gas stations. 😏
  8. And guess what? It was environmentalists, politicians, congresses fault, just when foreign competition began to kill the automobile industry with small, light, fuel efficient appliances they introduced the CAFE standards in 1975, read this for the impact it had. The first gas crisis was 73/74 people (me) were siphoning fuel from cars. Inwas stranded on an away basketball trip with the team because we couldn't get fuel. Gas stations were out of fuel. Leave it to the government to make things worse, think Savings and Loans, banking mergers, healthcare, education, public transportation, airline industry This was not the big 3, this was the government forcing them to change. GM was the size of the titanic, to get them to change direction and culture would take years https://en.m.wikipedia.org/wiki/Corporate_average_fuel_economy
  9. Black eye. More like a blight. Every car was not only shaped like a bread box, they were all about as fast as one too. Trans ams with 4.9L engines with just 155hp. The 6.6 dropped to 185hp. Corvettes weren’t even fast, really. The glorious Cadillacs were shrinking down and blending in with Plymouth reliants and Chevy caprices. "European Styling" became the new sales catch phrase, as european cars were the only ones that still had any style at all. Automatic seat-belts that were forever trying to strangle people, every interior panel covered in hard injection-molded plastic with faux leather grain, fumbling for a key to unlock your gas cap every time you needed gas, flat tires with locking hubcaps, the key for which was always lost. But it certainly was transitional, with all the designers and engineers practically starting from scratch, trying to lower emissions and fuel consumption while developing and incorporating new computer technology and trying to figure out how to bring it all together in a way that satisfied the public eye as well as the EPA. Must have been a very stressful time to work for The Big Three. Half the executives were probably running on cocain, cigarettes, and instant coffee.
  10. By 85 we had already had 2 gas crisis', the 80s to me were a transitional year for GM, the entire decade, has little in common with what went before the 80s nor did it have anything is common with what came after the 80s. It's sort of a huge black eye in my opinion. And I apologize to those who love the 80s GM vehicles. GM took many chances, made monumental mistakes, came out with innovational ideas, ie, 4/6/8, but they pushed forward. To me, 1991, was their rebirth However, it was transitional, and MANY changes were made in engine, electrical, emissions, computers, materials, etc. GM also had union, falling market share, CAFE, profitability and foreign competition to contend with.
  11. Ah. One of those strange little boxy Cadillacs that somehow retained much of the earlier interior space and enormous weight. I read that the company was told to expect gas prices to skyrocket, which inspired that bleak shrunken style shift in anticipation of people wanting smaller, more efficient cars. Then gas prices didn’t shoot up as predicted and Cadillac sales plummeted. They’re certainly a quirky reminder of a different time.
  12. Oh yeah. Know the feeling. For being so heavy they stay well on the road. It was 85 coupe deville. White with red landau from the quarter windows back
  13. Mmmm. What color? I’ve had three ‘85 eldorados. A silver one, a tan one, and my favorite- the rare Bordeaux red touring coupe, which was kind of a metallic black cherry with black rocker panels, aluminum mags, no vinyl top, with much of the chrome painted. It was an aggressive look. Interesting interior. Those old girls were like solid iron. Heavy as a garbage truck and floated like a dream. They could plow through 10" of snow like it wasn’t even there. I came around a bend on a particularly fast highway once only to find a woman in my lane going about 30mph. She was OLD! With cars on each side of me, all going about 80, all I could do was lock up the brakes and think of Paris. No ABS, no fancy computerized traction control,... that old girl skidded to a smoking halt just as straight as an arrow. I didn’t have to turn the wheel at all. It was a remarkable feeling as I naturally expected the nose to drop but everything remained level. Beautiful cars. Funny how you can miss cars like people sometimes.
  14. Those are long gone.😞. Last one I had with that was a 85
  15. rockfangd

    Mailbag: A/C on causes Overheating

    So it is saying it is hot but it is not. The only reason I can think of that it has in common with the AC is that there is more load which means more resistance in the cirvuits, and therefore a weak point will fail
  16. Bruce Nunnally

    The Rainsense story

    Nicely done. Glad you got it sorted out!
  17. rockfangd

    The Rainsense story

    So my 97 D'Elegance wipers did not work when I bought it a few years ago. I mentioned it here but never got too far into it until today. There is obviously a history here from previous owner(s). Windshield was replaced by previous owner. The wrong windshield was installed(no rainsense module) Because of that the wipers did not work, or at least properly. Someone attempted to diagnose the problem and replaced the whole motor and cover. Going to assume that didnt resolve the issue. So someone decided to probe all the prongs in the 8 pin plug to the cover. So I bought and installed the rainsense module for the windshield last year or so. Wipers still didnt work. Found that white plug with all the prongs spread. Fixed them the best I could. Since then wipers worked but barely. They would stop and start, make funny noise, randomly stop all over the window. So I decided to replace the whole motor and cover. I did that today and found the rest of the problem. The 3 pin black plug to the motor had been probed also. all 3 prongs were spread like someone had stuck a tester in them. So between the 8 pin plug, and the 3 pin plug that means 8 pins with bad connection. I fixed and rechecked all pins. Installed the motor. Cleaned everything nicely. And voila. I now have perfect working wipers. The moral of the story is that whoever worked on it previously probably never even heard of rainsense wipers and when the window got replaced they never even noticed the missing module so they went right to the motor and caused more trouble. So happy I have working horns and wipers now lol
  18. BodybyFisher

    Mailbag: A/C on causes Overheating

    You need to clear codes then and see if P0118 comes back in history again. It could be in the connector or wiring. Disconnect the battery fir 5 min, reconnect and drive the car for a day, then post codes here again.
  19. Chris Deville

    Mailbag: A/C on causes Overheating

    I changed it nd still ran hot
  20. Last week
  21. BodybyFisher

    Mailbag: A/C on causes Overheating

    Here is your problem, @Logan nailed it. Check the connection at the ECT sensor it is located on the rear head below the crossover facing outboard. Because it is history, it may be intermittent. P0118 P0118 CADILLAC - Engine Coolant Temperature Circuit High Input Repair Importance Level: 3/3 Repair Difficulty Level: 2/3 Possible causes Low engine coolant level Faulty Engine Coolant Temperature (ECT) sensor Faulty engine coolant thermostat Engine Coolant Temperature (ECT) sensor harness is open or shorted Engine Coolant Temperature (ECT) sensor electrical circuit poor connection
  22. Oh yeah. And with the old fiber optic light displays in the fenders. 😎
  23. Chris Deville

    Mailbag: A/C on causes Overheating

    My bad got off late Abs-c1214 current c1248current Amp no code DDM- B3832current u1000history DDS no code DIM- p1536 history u1000history IPC-u1000history IPM-B0409current B0419current B0429current IRC-u1000history u1164history u1016history LRD no code PCM-p0118history p0410current p1115history PDM u1000history RFA no code RCC no code RIM-u1000current RDd u100history Sdm no code Vtd no code
  24. There is just something about looking down a long hood to a nice ornament. Especially at night with the reflection
  25. Thanks again Rock. I’ll definitely give that Deville some more thought. It would be nice to have another Caddy with a hood ornament. Why did they stop making those??? They were iconic. Just watch. They’ll bring it back for an anniversary edition 10yrs from now and everyone will ooohhh & awwwww like it’s so fresh and clever. I honestly have no idea why I love them, but I do. My aunt says, "They help me steer.". Ha! 🤣
  26. Usually you can hear it running. You dont have any ac actuator codes This could be a bad fan. Try all modes, defroster, rotate up to heat and then back down. You should hear the fan come on. The fan is a weak point, they are known to crap out. This is a pulsed width modulation fan, so you can not connect power directly to it and expect it to.run. Typically, the old style fan had a controller facing forward that became damaged when EMF from the ignition wires damaged components on it. If you don't hear it, check its connector, to make sure it wasn't dislodged, it is under the hood just to the right of the driver seat on the firewall.
  27. I got codes PC0300 PC1380 TC0027 TC0037 IR1740 and I can hear a noise when I turn it like the Freon gassing maybe? how would I check if the fan is running
  28. jndnaps

    TPS and ICM Question

    This car has a lot of electrical issues, but it doesn't bring up any other codes. I had a message that said "service electrical system" Also, the steering wheel controls don't work anymore. The radio changes stations all by it's self and the volume sometimes blasts itself. Also, when the A/C is on the temp will go from Max 60 to 90 and I gotta keep putting it back down to 60 and the fan will kinda do the opposite of what it's set. If I have it's on high it'll all of a sudden go to the low setting. I'm assuming that all has to do with the steering wheel controls. I do have a V/O meter, but don't really know how to use it so that's not gonna help me. lol..
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