Keep following Jerris he is leading you down the right path.An Opti sitting 2 years on a blown engine hmmmm
Did you say fuel on the plugs?That is a sign of no spark.How many plugs had fuel on them?

Might I ask what happened to the engine the opti was on?

 

spark @ each cylinder but i can not really tell if it is firing on time though. fuel on the spark plugs but i have not pulled everyone out, checked 5 or so.

the opti spark has been sitting for two years in box with the other good parts that i planned on using again.

old motor went to the bone yard, hoping it would get melted down and make a new bumper for something later.

 

No I mean what blew up?You say you have spark but yet there is fuel on the plugs it just does not make sense.Even if the timing was off they should burn the fuel.Try pulling a plug grounding it and cranking it over and describe what kind of spark it is.You know color brightness.

When you say they are wet are they wet at the tip on the ground strap?

 

I assume the valves are adjusted correctly. If they are not, there is no way it will start.

 

Two missing parts to this, compresion and timing.

Bogus is correct with the valve adjustment and another thing is you need to check for spark at every plug at this point. I have seen plenty of motors foul the plugs and people chase there tails for days trying everything under the sun before swaping to a new set of plugs. How did you set the valve lash? Also just though of it when you check for spark at the plugs buy spark tester tool and check it with that. When My OEM Opti went south it would show spark but fail when I used the tester. The problem was carbon tracking in the cap and it was sending the spark all over the place and it would not jump the gap on the tester when set to the proper gap.

 

Have you checked the ground connection for the ECM injector qaud drivers? They control the injector firing. On my 90 it was tied to the fan ground. Check your manual for location.

Larry

 

valves have been checked 3 times, compression in all clylinders. i have checked all grounds to be sure i hooked them all up. i will try all the injectors tonight some how in a bucket, not sure how but i will get it done.

***** i'm not understanding how the opit spark can be 180 out??? help me with this.............

 

Sorry I had to bolt on you last night but wife, kids, homework..... you know.
Anyway back to troubleshooting.
You have 135 psi compression which is enough to start so I think everything is Ok with the valves etc.
The spark plugs are wet with fuel so this rules out fuel. If the spark is occuring when there is no compression in the cylinder, the gas in there will not ignite, even if the spark is good.
You need to check the timing which is difficult to do. When I installed a new opti I marked my damper and installed a pointer so that in the future I can find TDC on #1 if I need to but I am a bit **** like that.
If you have not installed the accesories yet and can get to the #1 sparkplug easily, stick a screwdriver in the sparkplug hole and bring #1 cylinder up to TDC in COMPRESSION. If you cant do this then pull the valve cover and watch the valves close and get it as close to TDC as possible.
Now take a piece of chalk or some paint and mark your damper and the housing behind it in a location that is convenient for spitting your timing light on it.
Then hook up your timing light and check to see if the #1 is fireing at or close to TDC while you crank it.
This will tell you if you have installed the Opti incorrectly. If so you will have to pull the Opti and reinstall it correctly. If you have to pull the Opti, go ahead and have a lok inside the cap to see if there is any arcing. This way when you reinstall it you can eliminate it as a source of your problem.
Let me know how this goes and we can move on from there.
Keep at it, you will get this worked out.
Jerris

 

i have done something very close to that but i'm still lost on how the opti spark can be installed wrong... the upper timing gear is keyed, the opti spark is keyed and the shaft between the two can only go in one way. RIGHT?

i did check camshaft timing buy marking the balancer one top dead center, checking the rockers. then spinning 360 and checking rockers again. i feel the camshaft timing is right one. i was worried my engine builder may have installed the timing gear/chain maybe 180 out but i feel i'm sure that is correct for sure.

my compression to timing light is where i see a issue. what i have done is installed the end of my compression tool into the cylinder with the gauge hooked up, ran a vac. hose so it's way up in my face. then i have installed the timing light to that spark wire for that cylinder. when that cylinder makes compression the timing light should light. now, i hold my finger over the hose, when i feel the hose expand it then blows my finger off the hose. but the timing light does not flash until after the compression goes away.

so i'm still confused on how a opti spark can be installed work. it's a 94 so it use's the shaft, not the late style. with as much work and checking i have i really feel my spark timing is off. it might be wortht the time to pull the opti spark off and check it. but since it only goes on one way what do i look for?

 

One question was asked-but not answered! what caused the demise of
the last engine??? I think he was getting to-did the opti get wet when the other engine went south???

 

the old blew big time, 6 grand bomb went off under the hood. did the opti spark get wet with anti-freeze, i would say yes but not that bad at all. i was running about 100 mph when the motor broke. i would say for sure it did get anti-freeze on it but i would say driving in the rain would have exposed more water to it ( was dry out when i broke ).

 

I am not sure how the Opti can be installed off because when I installed mine I made sure it was pointing at the #i sparkplug and that #1 was at TDC like I used to do on a distributer. Force of habit I guess or just ****. However the service manual tells you to mark the top surface of the shaft to denote location during reassembly so it obviosly can be installed off.
First you need to determine that it is off with your timing light. If it is off you should first check to see that the spark plug wires are on the correct lugs before pulling the Opti.
Reading from the bottom to the top on the drivers dide it should be 1, 7, 3, 5 and on the passenger side from bottomm to top it should be 2, 8, 6, 4.
I really need you to go through these steps one at a time with me and not get sidetracked if we are giong to fet this baby running as soon as possible.
Lets getrdone.
Jerris

 

I forgot, now that we know that gas is getting into the cylinders, we can put off testing the injectors until we make sure the timing is right.
Best regards
Jerris

 

I'm still going to check and be sure all injectors are spraying. there's no quick way to pull 8 plugs on a corvette. i have pulled the easy one's and yes there is fuel. i have them all out right now and i'm just going to buy a new set.

 

If this is the route you want to take at this point that is up to you. However I think you are close to getting the engine started if you can just get the timing straightened out and if it is running you will know if you need to work at the injectors and spark plugs.
Let me know when you have completed the steps I set out on the timing and we can move on.
Best regards
Jerris

 

all plug wires are on correct, been there done right already ( twice ).

 

How far off is the timing when you checked it with the timing light and the mark? You can do this with the plugs out, less strain in the battery.
Jerris

 

My opti was was installed incorrectly it can happen.Just because there is a key means nothing on gen 1 optis.It should slide in and out easily if there is tension it may be off.This is true for 92-94 cars.I took my gear from the old one and fitted it to orient the key on the new one.I fired the mechanic too.Mine was not 180 off mabey 40 degrees but it would not fire.I got one puff from the intake after 3 tries when I originally started it.

A little coolant can be enough to take out the opti.If you look around the plug on the GEN 1 opti you will see it is not sealed very well.Unfortunately it is on the top under the WP so guess what.This is why I asked what happened when your engine blew.

Do not throw money at injectors yet.You have fuel and untill it fires there is not need.Did you pull the plug and look at the spark?

By the way the balancer hub has an arrow on top of it when it is at 12:00 #1 cyl is at TDC

 

Well as far as infectors i have a set of 50lb that i just got. i will throw those in there and just to try and hope something different may happen.

as far as a opti spark, i get spark to all wires, i did that test last night. can a opti spark still throw spark to all 8 wires and still not work? how does one test a opti spark since it does throw spark to all eight wires? the money of buying one does not bother me at all, it's the chasing and i hate just throwing parts at something and crossing my fingers.

as far as the opti spark being off i just find it hard. that shaft only goes in one way unless you use a hammer.

***** is not helping.......

 

Believe me it did not take a hammer to get it in wrong I was there It did take a little push.Installed correctly it pops onto the Timing chain cover with a loud pop because it slides so easily.If it is off a couple of teeth it will still deliver spark just at the wrong time.It does not ruin it but after checking out all that Jerris has suggested I would be looking at it.

50lb injectors are overkill.Keep working with us if we think you need to do that we will tell you.It does not look that way right now.Keep your eye on the ball it will run again.