C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1984 C4- finally

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Old Oct 9, 2025 | 02:48 PM
  #101  
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Originally Posted by EpicTech
Wow I haven't been here in while lol. Life gets in the way sometimes. Anyway, I did get the Vette running and put back together but I did find another electrical gremlin done by the PO. Started the car up after finishing alternator and fuel pump and in my checks of looking to see if car is road ready, going through lights, blinkers, AC working etc, I found that engaging the turn signal shuts the car off. This was just too much for me. I know I shouldn't have given up, but I didn't right away. I came to the conclusion that the only real correction (and to keep from finding any other strange things the PO did) would be a new chassis harness and have all new OEM connections going to everything. I did find another harness, but life crap and time kept me from swapping it out. I sold the car sadly but I made some money on it. I learned a lot about the C4 platform working on this car, and if I had a shop with more space and a lift to work on it, I most likely would have kept it and swapped the harness over. I'm a little OCD about working in cramped spaces and working on that car with barely room to open a door I guess got the best of me and deterred me from swapping the harness over. The good thing is my wife got the message about me needing a dedicated work on car stuff area, and we went house hunting and found a place on 9 acres with a 40x60 shop!! We are working on getting it now, so excited !! I told her I want another Vette and she said to just get a nice one. I think maybe she is worried I will end up with another headache car lol. That being said I am now scanning the C4 for sale area. Mainly looking for 85-89 (because I like the dash design), pretty clean, no excuses cars. I would consider a LT4 car, even though I hate the dash design of the 90 and on C4. The motor is more important to me than the overall looks ( I know, I'm weird lol). I found a beautiful maroon 89 at a dealer in Dallas, but it sold before I could move on it.
Sometimes you just have to know when to cut it loose. Especially if you're not emotionally attached to a car, it just doesn't make too much sense.

I'd just add that, for me personally, depending on what your goals are, I'd much prefer an 85-89 too. The LT1/LT4 is an awesome motor, but I'm just not a fan of OptiSpark and the nuance that goes along with it. In the later years, it's also that in-between OBD1 and OBD2 and they were trying to be cool with the DIC, and it's just not worth it in my mind. But they're still cool. I think the TPI motor is a much more simple machine, so much more opportunity for easy aftermarket upgrades.
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Old Oct 9, 2025 | 03:08 PM
  #102  
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Well I was kind of emotionally attached to it. My parents had a very similar version, and I bought this one from a friend who could not finish it due to health reasons. I really wanted to finish it and take it to him and show it one day. Like I said though, he made to many questionable electrical changes for me to take any further than I did.
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Old Dec 5, 2025 | 05:52 PM
  #103  
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Hi folks. Well I been discussing another Vette with the wife. We just got her another Mini Cooper after having bad luck with the first one. Scored her a 2011 Cooper S Vert. A lot like the previous one, just a different color. Now that she is set, we have been trying to decide on C4 vs. a C5. I told her the C5 is easier to get in and out of, and they have better engines, among other things. Her argument is that I am more attached to the C4 gen, and that I should stick with that and find one of those. I have a couple C4's located that I want to check out, as well as a couple C5's. One C4 I really like has the 4+3 Doug Nash, and the seller states reverse is out/not working. Spigot bearing or linkage possibly?, idk. Read some bad things about that and I am torn between taking one of those on, or just getting an auto. If I go C5 I can get a more refined manual. So many decision lol. Stay tuned, might be picking up something soon. Worse case scenario it will be February-ish or March.
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Old Dec 5, 2025 | 08:21 PM
  #104  
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I think the 1984 has a lot of fans as it's the original and what started the generation... it's certainly the most affordable year in terms of acquisition cost averages by a long shot... it's the most common year as they built a lot of them and there were really long wait times... but it also is the oldest with the most aging issues and needs the most maintenance.

A real nice clean and well functioning 1984 is quite rare, and somewhat impressive. I truly do like the available cloth seats, the Z51 suspension, the manual climate control, the no third brake light, the actually existing options for no rear glass defrost and no cruise control, the no ABS. I don't like the cast iron heads, the low power rating, and the Crossfire injection.
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Old Mar 16, 2026 | 11:44 AM
  #105  
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Hi guys, I have a nice update for all of you!! This took a while longer than expected, but I was waiting for a nice one to pop up. I really like the black and was hunting a cloth interior car with manual AC, no mods and low-ish miles. I wanted 85-to 89 because I am weird and like the digital dash, that is what my folks had and I wanted to stick to that so I did. A very clean 85/auto car popped up actually at a small used car dealer here local to me. I know the dealer and they have a good rep, sell lots of clean stuff, and the owner is nit-picky on what he acquires for re-sell. I am not sure all of the options just yet, and I meant to snap a pic of the build sheet, but I was excited about finding it, and it was so close to everything I was hunting. I purchased this over the weekend, and it is still at the dealer as they are correcting some stuff that they had already intended on doing. I am supposedly picking it up today and I am quite lucky I was surfing the web Friday evening. I saw it as a just-listed car on their site. Showed the wife and she was like dam its just like the old one, only better. Then she had the same thought as me, it's going to sell fast, and the hit counter on the website for this car already had a lot of hits. We agreed to be fthere first thing in the morning. We get there and the Vette is not there, my heart sank, thinking someone probably put a deposit or something on it. A sales rep comes out to greet us, and I ask about the Vette. He says it's down the street at the exhaust shop, correcting what I was told is still the original exhaust. He said yea there is some holes before the mufflers, so we sent it over to get fixed. I told him I would like to see it and he offered to go get it as the shop had not started on it yet. So him and a porter go get the car, I wait maybe 15 minutes and I see it coming up the road. HOLY **** is my first thought (pictures never do a car justice, in-person is always different lol). He pulls in and sure enough, the Vette is loud, meaning probably several holes in the exhaust. I am however more so looking at the car in kind of a disbelief. The website was saying 59k actual miles, but I am a huge skeptic. Seeing this car removed that doubt. It's clean. I suddenly remember my wife is standing beside me, extremely quiet. I look over at her and she is just staring at it and then says, "are you serious?" So we start going over the car and it is very nice, a few chips here and there on the paint, nothing major except a nickel-sized chip near the driver side headlight, that was corrected,, but I could tell it was a patch fix. Also some light paint cracking on the rear bumper, but you can't see it from 5ft away. We noted some discrepancies with the sales guy and they are addressing those items today.

AC does not work - they stated up front they are not fixing at the listed price.
Radio does not come on.
Passenger exterior door handle inoperable.
power antennae is stuck?
reverse lights inoperable
rear view mirror is loose
2-3 upshift feels harsh?

The good:
Looks amazing at 10ft
1985 black on gray cloth
engine bay looks great
interior looks amazing, one small seem separation on driver seat bolster

Options: (that I can tell without build sheet)
glass roof
no 3rd brake light
Delco BOSE stereo
rear defogger and side mirror
power seat
Cruise Control

Here is the only picture I have so far.



Last edited by EpicTech; Mar 17, 2026 at 09:24 AM.
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Old Mar 17, 2026 | 02:34 PM
  #106  
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Congratulations! Time for a new thread with many pictures. I've had my 1989 for almost 20 years now.
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Old Mar 17, 2026 | 02:56 PM
  #107  
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Drove the Vette to work this morning, then went home for lunch, tightened the loose rearview mirror and looked in the storage area behind the driver seat and found owners manual and the options code sheet. Earlier today, I went to Corvette Museum site and ordered a window sticker and build sheet, laminated versions. I intend to show the car in the all-original/unrestored class. I feel I have a nice story, with my folks having an 86 and that I was not allowed near it, etc, and was kind of the forbidden fruit, if you will. Now years later I finally have one and achieved a goal of acquiring a car my stepmother told me I would never own. Now I can learn what they were all about, even though I did start that quest with the 84.
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Old Mar 17, 2026 | 02:56 PM
  #108  
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Thank you! Do you really think I should start a new thread?
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