BodybyFisher

It seems the bricklayer is a better mechanic than the guy who calls himself a mechanic! 😉 The title 'mechanic' is used loosely sometimes 😁

Just a thought, I am reaching here. Are the O2 sensors new? Are they torqued to spec? An O2 sensor slow to warm up to operating temp might delay closed loop operation. Have you observed real time O2 sensor and fuel trim data? Does the exhaust smell rich while idling fast? Can you confirm open and closed loop operation either by an analyzer or via the DIC?

Oh yes, sorry, I forget the 93/94 has the magnesium enclosed intake. The fuel pressure regulator is in there and vacuum directly acts on it. So explain to me exactly what your problem is. You say it idles at 650-700 when hot that sounds perfect. Is this an original unmodified ECM? When does it slow down too slowly, warming up or coasting to a stop? Right after start up when the engine is cold? As you know when the engine is cold it runs in open loop and it will have a higher idle and will run rich until the system goes into closed loop and the o2 sensors take over. Explain your symptom in detail.

I agree with @rockfangd but explain what you are trying to do in more detail for us, thanks I have ONLY jumped my 96 for diagnostic reasons, and then purchased a new pressure switch

@Logan @KHE @Barry94 The guru used to have an easy method of adjusting the ISC motor, do any of you guys remember his trick? Thanks guys

OK, at least you know the ISC is not the issue and you can eliminate that as a cause. Just one thing however, is it retracting? Are there any codes? If you had the throttle body off, did you replace the gasket/o-ring? I have a 94 factory service manual, I will open it tomorrow and look it over. As you know, a vacuum leak causing unmetered air will cause a fast idle, what are you idling at?, does the idle come down to normal?, or does it stay high? Is the throttle plate closing? Did you replace the intake manifold gaskets? You have phenolic egr spacers on that engine, I believe there are gaskets on both sides of it. There is an anti-backfire valve in the intake by the power steering pump, if that leaks you will get a high idle, listen near that to see what you can hear as far as vacuum leaking, it might whistle. On 96 and up, we can see a lean mixture caused by a vacuum leak by lean codes P0171 and P0174, I am not sure how a lean condition can be found on the OBD1 system Ill look at my manual, and see what I can find

I can only think that your speed has been limited because the Magniride has been removed/disturbed. How are you reading the codes?, will the reader pull all codes or just powertrain or P codes? You need Chassis or C codes. Some Cadillacs will show a message that the speed has been limited when a suspension code is set. Your problem is related to the magniride Ill bet, see this https://www.cadillacforums.com/threads/speed-limited-to-80-mph.280591/

I didn't realize that it was only the case, I aee a link to full remotes but it seems to go nowhere I have found that the rubber buttons lose their ability to be conductive so in some instances a replacement case with buttons could be helpful.

The first video I opened was you discussing and performing piston ring gap clearance! Nice.

I thought about you today, I went to LI Hardware for plumbing parts and took a look at the keyfobs they sell for you. They are made by Duracell oddly enough. And here is the website! I hope this helps you https://duracellremotes.com

I am very interested in all the work you have done to your engine. I have not reviewed it in detail yet but will. Good luck and keep us up to date. Post some photos. Let me know how I can help

That is what I would do, install a new one and eliminate it as a source of the problem. I cleaned one, replaced it with a used one, and couldn't solve the problem until I replaced it. Let us know how this turns out. While you are waiting, check that the throttle plate closes and the cable isn't binding. Clean the TB throat and plate including the back of the plate really good. Your TPS can be tested with an ohm meter, sweep through its range and see how the meter reacts, it should sweep smoothly with no drop outs.

The 93 had an ISC motor to control the idle, you can attempt to disassemble it and clean it up paying close attention to the closed throttle contacts which can cause the ISC to remain open if they are dirty. I had this problem on a 95 recently and once I replaced the ISC the idle and return to idle was perfect. Barry94 has a good writeup on the ISC motor, here is the link

Heat is the enemy of capacitors, it is possible that the heat damaged the board. Direct sun on a black surface can get quite hot. You did exactly what I would have done, cleaning, battery and key pad. The only other thing I might do is try jumping the button area on the circuit board to be sure the board is the problem. That said, I have a terrific mom and pop hardware store near me called Long Island Hardware, they sell new key fobs. You might give them a call if you can't find a replacement https://www.lihardwarestore.com

I edited the above, Its the off and warmer buttons See this on reading codes http://www.caddyinfo.com/readingcodes.html

I have a 96 factory service manual. Post as much data as you can. You run codes on a 96 by holding the OFF and Warmer buttons simultaneously. The codes will come up in the DIC. Use your smart phone to take a video of them and write them down later. I think you are looking for B or Body codes. You may also see U or network codes.

Have you extracted all codes from the system?, post all codes here Explain what you did, this sentence needs explanation "It started with me wanting to program a key fob"

I really like these, wires are clamped inside

You might consider converting to a top terminal battery and use these adapters https://www.ebay.com/c/25019143601

It looks air worthy

The 61/62 has beautiful lines

Wow, impressive

That switcheroo is going to be ripped by publications. It is a great name but it was associated with a different engine, the LT4 is a great engine in its own right

I heard that also. I thought the Blackwing was being shelved?

One step up, two steps back. It's funny how Bob Lutz is still involved in the background. I think GM suffered during the 2008 - 2016 period and actual 'car guys' are gone. All you need to do it scroll down this page to see why https://www.gm.com/our-stories/sustainability.html As GM goes, so goes the country. One look at politics, politicians, someone with dementia running for potus, the media complicity and how easy it was to shut down the country with flawed models predicting 20 million deaths, when it turned out to be maybe 100,000 and Sweden's people were less cowed into obedience than the US and you understand why GM is where they are. Actual men like Bob Lutz are no longer involved. The friggen press has been hyping a spike in Arizona covid-19 cases because they want to prove the warm weather doesn't slow it when in actuality they are misleading the public. I am sick of the limp wrists running this country into the ground with their agendas. I apologize in advance if I have offended anyone. https://www.azfamily.com/news/continuing_coverage/spike-in-az-covid-19-death-numbers-may-be-misleading-health-officials-say/article_8366af78-9189-11ea-9500-2f43b84f81f7.html