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

My '96 hates me.........

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Old Dec 22, 2009 | 05:26 PM
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Originally Posted by rlane5
When you try to start it Hold the gas pedal to floor or open the throttle blade open, while cranking, the plugs probly are wet. That's why you smell the gas. It's better to remove all the plugs though.
Randy
I propped it open for quite some time. No dice. I think that only applys to a carb set up anyway. Thanks though!
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Old Dec 22, 2009 | 05:30 PM
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What else could possibly go wrong overnight like that besides the opti?
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Old Dec 22, 2009 | 05:39 PM
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I wish I could help ya out Mike. Just passin through to say good luck and dont give up. Ya got a great lookin vette.
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Old Dec 22, 2009 | 05:41 PM
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Originally Posted by 5POINT7
I wish I could help ya out Mike. Just passin through to say good luck and dont give up. Ya got a great lookin vette.
Hey man, long time no hear. I appreciate it but right now it's on my s*** list if ya know what I mean. I'll get it though,thanks
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Old Dec 22, 2009 | 06:40 PM
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Originally Posted by Weav's Vet
I propped it open for quite some time. No dice. I think that only applys to a carb set up anyway. Thanks though!
Nope it works with your car....clear flood mode!


Have you put a node light on the injectors?
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Old Dec 22, 2009 | 06:42 PM
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Originally Posted by aboatguy
Nope it works with your car....clear flood mode!


Have you put a node light on the injectors?
Speaking of light, I used one of the dash lights for that. It fit in the pigtail perfectly.
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Old Dec 22, 2009 | 06:55 PM
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Originally Posted by aboatguy
Nope it works with your car....clear flood mode!


Have you put a node light on the injectors?

No I haven't, I have a noid set I've never used. What exactly do I look for when I connect the light? Just to see if it pulses or not? Just like the injectors do.

Last edited by Weav's Vet; Dec 22, 2009 at 07:01 PM.
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Old Dec 22, 2009 | 07:06 PM
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Originally Posted by Weav's Vet
No I haven't, I have a noid set I've never used. What exactly do I look for when I connect the light? Just to see if it pulses or not? Just like the injectors do.
Yep....

Dude I feel for you! however, compression, spark, fuel, air ...air should be a given... but its got to be one of the them. Hard to get opti timed wrong so I threw out timing.


Mike
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Old Dec 22, 2009 | 07:50 PM
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Ill tell you what I have a 96 and I did a LE2 cam swap. After about 1000miles or so my opti just went. Symptoms were cranking but no starting. The smell of fuel was strong. It would putter under WOT but wont start. Checked spark it was correct on ever plug. I had good fuel pressure and spark. I changed all ignition parts just to make sure. It was the opti....... double check everything before you buy. I have a thread on it if you wanna read its in my posts.
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Old Dec 22, 2009 | 07:57 PM
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Originally Posted by fc_soldier
Ill tell you what I have a 96 and I did a LE2 cam swap. After about 1000miles or so my opti just went. Symptoms were cranking but no starting. The smell of fuel was strong. It would putter under WOT but wont start. Checked spark it was correct on ever plug. I had good fuel pressure and spark. I changed all ignition parts just to make sure. It was the opti....... double check everything before you buy. I have a thread on it if you wanna read its in my posts.
I remeber reading some of that thread. So it was the opti. I'm thinking it just about has to be in my case also. What else could just quit working like that? Thanks for posting and reminding me of your problem. It sounds just like what I'm going through.
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Old Dec 22, 2009 | 08:16 PM
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Originally Posted by Weav's Vet
I remeber reading some of that thread. So it was the opti. I'm thinking it just about has to be in my case also. What else could just quit working like that? Thanks for posting and reminding me of your problem. It sounds just like what I'm going through.
yeah i have a write up how I proved it was it. And yes it went out outta the middle of no where.

Nothing besides a fuel pump, PCM, or opti will cause this symptom. If not check all fuses.
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Old Dec 22, 2009 | 08:27 PM
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On the Opti, I will stress the importance of install. The pin depth into the opti from the cam is vital to the life of that opti. I went through a few before realizing this.
After market cams must be checked. The thickness of the gasket, with RTV and that camshaft dowel pin can ruin an opti quick. Its like when someone slaps a 4L60 together and the 3/4 clutches burn out. Its critical to ensure it is in correct. Have you ever seen Dynasparks insall instructions. IN DEPTH.
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Old Dec 22, 2009 | 08:29 PM
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Originally Posted by steve40th
On the Opti, I will stress the importance of install. The pin depth into the opti from the cam is vital to the life of that opti. I went through a few before realizing this.
After market cams must be checked. The thickness of the gasket, with RTV and that camshaft dowel pin can ruin an opti quick. Its like when someone slaps a 4L60 together and the 3/4 clutches burn out. Its critical to ensure it is in correct. Have you ever seen Dynasparks insall instructions. IN DEPTH.
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Old Dec 22, 2009 | 08:49 PM
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Originally Posted by steve40th
On the Opti, I will stress the importance of install. The pin depth into the opti from the cam is vital to the life of that opti. I went through a few before realizing this.
After market cams must be checked. The thickness of the gasket, with RTV and that camshaft dowel pin can ruin an opti quick. Its like when someone slaps a 4L60 together and the 3/4 clutches burn out. Its critical to ensure it is in correct. Have you ever seen Dynasparks insall instructions. IN DEPTH.
No I didn't check it Steve. It's the same pin that was in it before I tore it back down. Wouldn't that destroy an opti rather quickly? I drove the car at least 50 miles before this last issue cropped up.
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Old Dec 22, 2009 | 09:05 PM
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Mine lasted about 1000-1500 miles before it crapped out. I think its the luck of the draw.
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Old Dec 22, 2009 | 09:21 PM
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Originally Posted by Weav's Vet
No I didn't check it Steve. It's the same pin that was in it before I tore it back down. Wouldn't that destroy an opti rather quickly? I drove the car at least 50 miles before this last issue cropped up.
Nope, it is a metal baseball bat in there beating on the rotor area. The vibration of the camshaft transmits through it. If that dowel length is wrong, to thin, etc it can cause problems, and not right away. I had one that lasted a while, till I floored it and it blew the "****" up. Quite the drama.
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Old Dec 22, 2009 | 09:47 PM
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Originally Posted by steve40th
Nope, it is a metal baseball bat in there beating on the rotor area. The vibration of the camshaft transmits through it. If that dowel length is wrong, to thin, etc it can cause problems, and not right away. I had one that lasted a while, till I floored it and it blew the "****" up. Quite the drama.
Ok then, I'll check out some things first before going after the opti. Do you have a length or dimension the pin is supposed to be if I get that far?
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Old Dec 22, 2009 | 09:55 PM
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Originally Posted by Weav's Vet
Ok then, I'll check out some things first before going after the opti. Do you have a length or dimension the pin is supposed to be if I get that far?
http://shbox.com/ci/cam_install.html

On my two cam installs the pins were too long I didn't cut or grind them I tapped them in with hammer before installing cam.


Mike

Last edited by aboatguy; Dec 22, 2009 at 09:57 PM.
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Old Dec 22, 2009 | 10:04 PM
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Originally Posted by aboatguy
http://shbox.com/ci/cam_install.html

On my two cam installs the pins were too long I didn't cut or grind them I tapped them in with hammer before installing cam.


Mike
That's a very good link Mike, thanks! I know mine wasn't as long as the CC's one. A guess would put it about 1/2 inch.I also had to tap mine in. It came out with the cam sprocket when I was aligning the chain. The opti also just clicked on when I installed it. Wouldn't the pin being long keep it from doing that? Anyway, like I said, if I get that far I will check it.

Thanks guys, I really appreciate all of this!
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Old Dec 22, 2009 | 10:21 PM
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after a cam swap, one of my injectors began leaking; over the course of a week or two, it leaked enough to completely fill the crankcase with gas and pour over into the exhaust system; I'm sure that if it leaked into a cylinder with the piston coming up on the compression stroke, it could hydrolock that cylinder and prevent the engine from cranking over.

the moral of this story ? smell gas ? check your oil !
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