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

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Old Jul 29, 2007 | 01:43 AM
  #21  
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Get a FSM and start there.... or Check the Tech Tips..... or Use the Search function....
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Old Jul 29, 2007 | 11:31 AM
  #22  
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Lots of good ideas. The best thing is that all these are inexpensive and things most of us can do ourself.

Art


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Old Jul 29, 2007 | 01:17 PM
  #23  
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Originally Posted by LAAllison
Lots of good ideas. The best thing is that all these are inexpensive and things most of us can do ourself.

Art


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Yeah, but most of what yall are saying is over my head. Lol.
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Old Jul 29, 2007 | 01:31 PM
  #24  
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Originally Posted by Corvette85350
Yeah, but most of what yall are saying is over my head. Lol.
Listen, while I have reservation about yanking a wire off with your bare hand.......it is a good way to figure out which wire is misfiring. Just use an insulated pair of pliers to grab the wire at the distributor.

Pull one at a time and listen for a difference. then make sure your completely return that wire on the distributor before you pull another.

Go through all 8 of them, you'll find one that leads to no change at all. Then at least you can tell the service writer that you have a dead cylinder and provide him with which cylinder number to focus on.

Or, you could try new Wires yourself. basically buy new wires, line them up on the driveway from longest to shortest. Then (when the car is off and cool) yank one wire off completely. Find the matching length wire from the new set and put it on the exact same spot the old one came off.......and pay attention the physical routing. Put your new wire in the same routing as the one you took off.

Now move to wire Number 2. and repeat the process.

Two hours later your ready to start the car and see if it makes a difference.

if it did, GREAT you found the problem, If it doesn't make a difference then you just performed a maintenance item that the Dealer charges $200 for doing and you only paid $45....stick a feather in your hat and call it a day.
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Old Jul 29, 2007 | 02:16 PM
  #25  
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Originally Posted by Corvette85350
My 85 has been really shaky lately. Its like you either have to floor it, or it doesnt move at all. Its weird. And when youre just barely holding the gas it just shakes like crazy. Has anyone experienced this problem, or does anyone know what it is? Thanks, Zak.


Its sounds like Alzheimer I would take em to the car doctor






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Old Jul 29, 2007 | 05:06 PM
  #26  
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Originally Posted by jhammons01
Listen, while I have reservation about yanking a wire off with your bare hand.......it is a good way to figure out which wire is misfiring. Just use an insulated pair of pliers to grab the wire at the distributor.

Pull one at a time and listen for a difference. then make sure your completely return that wire on the distributor before you pull another.

Go through all 8 of them, you'll find one that leads to no change at all. Then at least you can tell the service writer that you have a dead cylinder and provide him with which cylinder number to focus on.

Or, you could try new Wires yourself. basically buy new wires, line them up on the driveway from longest to shortest. Then (when the car is off and cool) yank one wire off completely. Find the matching length wire from the new set and put it on the exact same spot the old one came off.......and pay attention the physical routing. Put your new wire in the same routing as the one you took off.

Now move to wire Number 2. and repeat the process.

Two hours later your ready to start the car and see if it makes a difference.

if it did, GREAT you found the problem, If it doesn't make a difference then you just performed a maintenance item that the Dealer charges $200 for doing and you only paid $45....stick a feather in your hat and call it a day.

Yeah, I might just have to try new plug wires. I already thought about doing it anyway. Whats a good brand to buy, and what will it run me? Thanks, Zak.
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Old Jul 29, 2007 | 05:09 PM
  #27  
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MSD - $74.20 from Summit.

I just ordered a set last night.
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Old Jul 29, 2007 | 05:21 PM
  #28  
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Originally Posted by CRV3TT3
MSD - $74.20 from Summit.

I just ordered a set last night.

What does everyone else think? Is this the best brand to get?
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Old Jul 29, 2007 | 06:02 PM
  #29  
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Originally Posted by Corvette85350
Yeah, I might just have to try new plug wires. I already thought about doing it anyway. Whats a good brand to buy, and what will it run me? Thanks, Zak.
How old are the plug wires? Do you have any good reason to suspect them? You can ohm them and maybe save your self the $45.00.



Originally Posted by Corvette85350
TPS voltage???
Originally Posted by Corvette85350
Yeah, but most of what yall are saying is over my head. Lol.
You need to order the FSM and read it, and study it. Besides guiding you through repairs and the invaluable trouble shooting charts, the manual explains the operation of many of the car's systems. Until "most of what yall are saying" isn't over your head, you are going to be at the mercy of having to "throw money" at the problems (like maybe the plug wires you haven't yet tested), or professional mechanics, some of which aren't a whole lot better informed than you are. Before you can be helped, much, you have to help yourself.

It sounds to me like you have some crossed plug wires. It will cost you nothing to trace them down and verify that all the wires are on the correct plugs.

RACE ON!!!
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Old Jul 29, 2007 | 07:10 PM
  #30  
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Originally Posted by jhammons01
SEEEE!!! that was a question I had in this and another thread.

Someone said the same thing about "just pull a wire off at the distributor". My question was while the motor was running?

Just being unsure of myself I didn't question further. But I'll say this......you only grab a wire, while the motor is running/starting, bare handed one time and one time only.
When I was 14 and my brother was 16, we were working on a missfire problem on his 4cyl AMC Spirit. It would only run at 1/2 throttle or more. I held the gas most of the way down, and he grabbed the coil wire thinking it was the first one to try........ .......is what he looked like running across the yard.
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Old Jul 29, 2007 | 11:14 PM
  #31  
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Originally Posted by Corvette85350
What does everyone else think? Is this the best brand to get?
MSD is unnecessary and beyond your budget.

If you need new wires, get oem replacements.
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