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

85 starting problems

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Old Dec 26, 2008 | 08:47 PM
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Default 85 starting problems

I put back together an 85 and I can not get it to fire up. I do have spark and fuel. Everything is plugged in that needs to be. What can be the problem here. I also checked all of the fuses.
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Old Dec 26, 2008 | 09:08 PM
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Originally Posted by buddylee432
I put back together an 85 and I can not get it to fire up. I do have spark and fuel. Everything is plugged in that needs to be. What can be the problem here. I also checked all of the fuses.
Is this a crossfire injection car or port? How do you know you have fuel, did you check it at the schrader valve or can you verify that the injectors are operating. I guess what I mean is, pull a plug and see if it is wet. If not your not getting fuel. Uh, crank it for a bit before you pull a plug....
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Old Dec 26, 2008 | 09:10 PM
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It is a TPI not crossfire. I will try that and see. I just used the schrader valve to check.. not pulling the plugs
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Old Dec 26, 2008 | 09:25 PM
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Originally Posted by buddylee432
It is a TPI not crossfire. I will try that and see. I just used the schrader valve to check.. not pulling the plugs
I'm betting that you are not getting an injector pulse. This could be because of the opti or the wiring.
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Old Dec 26, 2008 | 09:30 PM
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No Opti on an 85.

Are you getting any backfire at all to indicate that you have spark and fuel?

Did you align timing marks with compression on #1 then line up distributor?
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Old Dec 26, 2008 | 09:34 PM
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It is a HEI, Also yes it is trying to start as it has some backifiring going on. I pulled the number one plug and it is wet with fuel. I also tried to make sure that it is TDC and i plugged the spark plug hole with my thumb but I am not getting any air to blow out.....Is this a major deal? What could this be?
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Old Dec 26, 2008 | 09:38 PM
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Originally Posted by John A. Marker
No Opti on an 85.

Are you getting any backfire at all to indicate that you have spark and fuel?

Did you align timing marks with compression on #1 then line up distributor?
lol, good god now I'm doing it!!! If there is something wrong with a Corvette it MUST be the optispark!

Sorry guys!
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Old Dec 26, 2008 | 09:43 PM
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uh, no air at all at anytime when the engine is being cranked? Yeah that could be a problem! I am REALLY hoping that you just didn't crank it long enough to catch the compression stroke.

What was the engine apart for?
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Old Dec 26, 2008 | 09:53 PM
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Here is a great write up on how to set it by one of our forum members. He went from never having done it to writing this in about 3 hours. It's not tough you just have to be careful. Scroll down the page to where the pictures start.

http://forums.corvetteforum.com/c4-g...-adjusted.html
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Old Dec 26, 2008 | 11:06 PM
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If you cover the #1 spark plug hole with a finger or thumb and turn the engine by hand....are you telling me that you have NO compression??? If so, you have the valves TOO TIGHT!!

You should be able to turn the engine by hand....line up the mark on the balancer and the '-0-' pr even 6 degrees when you have compression on the #1 cylinder. You should then line up #1 spark plug wire on the cap and match the position to the rotor.
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Old Dec 26, 2008 | 11:10 PM
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That is point the rotor at the number one cylinder and this should be close to the number one wire terminal on the cap
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Old Dec 27, 2008 | 04:14 AM
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The valves were too tight AND I was 180 degrees off! Man o man, I am glad it didnt fire or I would have ben many pushrods!

Anyways I got it to fire! It was too late to fine tune because of the noise level and my shop being in a populated area. I will fine tune tomorrow. Thanks for the help guys! I am greatly appreciative of the web site and the fast responses.
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Old Dec 27, 2008 | 04:18 AM
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Yeah I'd say REAL lucky! Glad you got it. You never told me, what was the engine torn down for?
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Old Dec 27, 2008 | 04:27 AM
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The guy I got the car from said he was wanting more power so he put a hotter cam in it and when he went back with the TPI and new chip, the ecm wouldnt read the cam. I just ordered a close to stock replacement cam and put it in for the stock chip so that I didnt have to worry about the chip. I also dont know much about the ecm and how it works so.... I am use to a 350 and a carb! At least my car has a HEI.

I still have a bunch of work to get the car up to par. I am at the rat rod stage right now. It is primered so I am thinking of a good paint scheem. Any ideas? It was originally the light blue color.
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Old Dec 27, 2008 | 04:36 AM
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Originally Posted by buddylee432
The guy I got the car from said he was wanting more power so he put a hotter cam in it and when he went back with the TPI and new chip, the ecm wouldnt read the cam. I just ordered a close to stock replacement cam and put it in for the stock chip so that I didnt have to worry about the chip. I also dont know much about the ecm and how it works so.... I am use to a 350 and a carb! At least my car has a HEI.

I still have a bunch of work to get the car up to par. I am at the rat rod stage right now. It is primered so I am thinking of a good paint scheem. Any ideas? It was originally the light blue color.
Well again this is a matter of opinion, but I have found complex paint schemes just don't really look good on Vettes. If I were to repaint my car I would do it like this I think.



A good color and a good paint job always looks the best IMHO
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Old Dec 27, 2008 | 04:41 AM
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That is a good looking car!
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