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Surprise, surprise! Things do eventually wear out! This is a normal wear item on our beautiful '88-'96 C4's! Your '85 headlight motors won't have this problem, but they would appreciate a good cleaning of the limit switches and lubrication (Lubriplate or CRC Sta-Lube) of the motor bearings...

Try this: http://www.corvetteactioncenter.com/tech/knowledgebase/article/1988-1996-corvette-technical-instructions-headlight-motor-gear-replacement-1222.html

Lamar, it sounds like you're trying to insult Antz. I surely hope I misinterpreted that statement! I'd appreciate a better understanding of this comment, if I'm wrong!

That's the second statement that makes no sense to me. Where did you get this info on a "limp home mode"? Here's the diagram for your '85 fuel pump circuit. If the engine is running, the oil pressure switch keeps 12 v. on the fuel pump, and the fuel pressure should stay high. If the fuel...

The Haynes is almost useless. Too much missing, and even more, misleading information. With a car in the condition of yours, you'll definitely appreciate the FSM!! The first thing I'd try would be a new fuel filter. This statement makes no sense to me. The oil pressure switch applies...

Get the car up in the air so you can check the shift linkage. Be sure the car is very well supported before you go under it. BE SAFE! Do the trans. levers and rods have good bushings? Does the shift lever put the trans. levers in the right positions, or is anything stuck? Good luck!! :w

First observation: Your serious lack of understanding of mechanics. Sorry to be so blunt, but this doesn't give us any clue about what you've done, or what you've learned about the problem. What's your fuel pump pressure? How's your ignition? Plugs, cap, rotor, wires? Look at your...

Lucky Guy!! You are in for a lot of serious fun!! Welcome to the CAC. The first thing you'll really learn to appreciate is a copy of the Factory Service/Shop Manual (FSM). eBay is a good source. The fan relay is a common problem in the '84's, so I replaced my bad relay and melted socket...

You don't say what year the Corvette is, but this video says it's for all C4's. That's not true. This video only applies to the '88-'96 headlights. The '84-'87 headlights are entirely different. It's easy to identify the difference. This video shows the motors for the headlights which...

Why would you want to disable the 'Limp Home Mode'? It would be better to fix the problem! What is the problem? :w

Here you go: :w

Does your '87 have different width wheels front and rear? Some C4's do. The fronts are frequently narrower than the rears. The wheel widths are marked on the inside. Could you possibly have a narrower front wheel on the rear? :w

My '84 has a fiberglass insulation pad on the underside of the "bonnet". The Crossfire air filter housing makes an impression in the fiberglass insulation of about 10 mm at the front of the housing. I'd say the fiberglass insulation is about 30 mm thick. 30 mm - 10 mm = 20 mm (est.) at the...

No. Is this your compaint? Are there other symptoms that bother you?

The TPI fuel injection system also injects fuel into the intake manifold. When an injector fires in the TPI system, some of the time the intake valve is open, and some of the time the intake valve is closed. The CFI spray pattern from the injectors looks like a continuous spray, but if you...

Lots of interesting debate here, but did the OP get his question answered? I'm not sure what Heyblue meant by "(sort of)", but to answer the question, yes, 87 octane is correct. That's what I run in my '84. My compression has been bumped up a bit, and I run 7 1/2 degrees static ignition...

I replaced both window mechanisms in my '84, and don't remember having this problem. If you loosen the mounting bolts for the glass, then push the glass in the direction it needs to move, you should be able to see what adjustments you need to make. Do you need some shims under some of the...

This problem could be caused by either the gears or the plastic pellets inside the large gear. The pellets are the most common problem. If you need new gears, be aware that the plastic gears will probably last another 25 years, and the brass gears may be so strong that the motor housing may...

This question has been answered on another forum.

What color is your interior? I had the fabric seats in my '84 reupholstered by Tivo's Auto Upholstery, in Santa Ana CA, phone 714-547-3891. They had genuine original GM fabric in stock that matched my "saddle" colored seats. Give them a call. They did a very nice job for me. :w