ESTATE SALE Cadillac EFI V8-6-4 | Will it RUN AND DRIVE 500 miles after 12 years?

I worked for Cadillac as a district service manager when that car was introduced. In pre-release service meetings, it was well-known from the very beginning, that the 8/6/4 was planned to be a one-year-only engine. The big problem was the early Delco electronics. The MAP sensor was calibrated with too-close tolerances. If the engine hic-upped (backfired) it would shut down. There was no repair except to replace the MAP sensor. The bigger problem was replacement stock was the exact same part, and it took GM a while before an updated unit could be supplied. Dealers would disconnect the 8/6/4 feature, running it as an 8cyl only. The press had a field day. I inspected a limo in West Palm Beach, Florida, that the owner wanted all the interior chrome replaced. Someone had discharged a tear gas device inside the car that caused the damage ( the interior chrome pieces came from different suppliers, so it was impossible for all of it to be defective) and I denied the claim. It turned out the limo was owned by the owner of the newspaper 'The National Inquirer" (famous for stories like 'I got pregnant by an alien, etc.) They went on a HUGE hate campaign, smearing the vehicle, which only threw fuel on the fire. Those were tough times to be a Cadillac District Service manager.

"The brake drum has traveled farther than the vehicle itself" man that was classic.

As a 35 year mechanic I want to say that I admire Derek for messing with that aggravating thing. RESPECT!

Having a cameraman is a big plus. Being able to catch that brake drum take off and catch Derek's live expression in the shot was absolute gold.

I took a shot for every time you tried starting the engine. My liver has dissolved. Thank you

A bad Coolant temperature sensor will cause all the problems you're experiencing if it's feeding the ECM a -39 degree value. Very common problem in that era.

This episode should be called Man versus machine. It's so fun to watch these videos of Derek doing Derek things. Hats off to O'Reilly's for supporting the man.

I think this is the first time that we have actually seen you really struggle with a rig. This is sooooooooo relatable - if you have spent any time under a hood, you have been here. Thank you so much for showing that you struggle at times. So much of what you do, you make look so easy and it is so cool to see that the master struggles at times too - but you never give up and you are an inspiration to so many.

I clicked this as fast as I could, VGG is definitely my favorite thing on YouTube.

I took apart a TBI unit, and on trying to start it flooded the engine with fuel. The engine hydro-locked, so I took out the plugs and turned over the engine. The ejected petrol was ignited by a stray HT lead and the whole engine bay went up in a large fireball. My kids asked me to do it again as they didn't all see it... Ahem. 😮

Great attempt! Been working on cars for over 30yrs Rule #1 for any obd1 system when it dumps fuel, unplug the coolant temp sensor for the computer. When they fail, they tell the computer its -39 degrees therefore it dumps the whole fuel tank down it. Then go from there. Would like to see an update on this. Thanks for sharing with us! P.S. I still have that rear bumper for independence to give to you if you want it.😂 Keep them videos coming but don't over work yourself buddy.

I have owned a couple of these. A simple intercept of the high gear signal wire from the driver side of the transmission will bypass the 8-6-4 system. There is also a single pole plug under the hood to bypass the digital computer for analog. Hold the "OFF" and "Warmer" buttons on the AC control for a few seconds to enter the built-in diagnostics. It will allow you to see all sensor values and even cycle all solenoids... enjoy!

Derek had it right when he said “radio doesn’t work?! I’m selling it” 😂

As someone who loves your channel and thinks the world of you, it was painful to see you struggle so. I also admire your commitment and have the utmost respect for how hard you worked on this episode. Thanks for all you do and the sacrifices you and your family make to keep this channel the best on you tube.

Derek, can’t stress enough the importance of SAFETY GLASSES. I’ve had the unfortunate experience of getting shards of metal stuck into my Cornea. Definitely not an enjoyable experience. Eye Doc was able to pluck the bits out. But this experience taught me a valuable lesson. You only get one set of Eyes. Protect them from damage!

I don’t think I have laughed so hard at an episode as this one. You were in rare form. Love it. Thanks for all the hard work to make these videos for us

The whole muffler battle killed me lol. Derek, you truly are every good old boy and I'm sure I speak for most of us when I say we appreciate the honest representation in media 😂

The rear brake drum shooting across the garage summed this episode up pretty good. I was cracking up then saw you doing the same.

Someone needs to do a compilation video featuring all of Derek’s descriptions of the smell of a car’s interior. “PROCESSING…PROCESSING…A mahogany axe handle wrapped in wet woolen socks.” Classic.

Seems like a perfekt fit for Derek. A factory car that randomly jumps from running 4 to 8 cylinders. Perfectly normal. Enjoyed this episode very much!