ruby1993red

i am looking for a good corvette mechanic. my 1993 will crank but not start. I live 25 miles south of Pittsburgh pa.

help please

1993C4LT1

If you want, we can help you diagnose the issue.
Crank, no start is usually this:
Bad fuel pump
ICM
Opti
Coil

antfarmer2

With help from in here you can fix it yourself. With a good chance cheaper than your tow bill.

enventr

If you do not wrench on your cars and want a mechanic ask your local corvette club who they use. As mentioned you could save a lot by doing your own work. This forum has many knowledgeable people on it. Don't take it to a Chevrolet dealer .

ruby1993red

Will crank but nothing even with starting fluid. Will sputter after key released.

antfarmer2

Any codes? You can look on youtube to learn how. Only need a paper clip.

ruby1993red

Did not get the codes yet. When cranking the engine the tach does not move. I pulled a spark plug wire. There is a orange to blue spark.

1993C4LT1

Do you have a noid light, to check for injector pulse? At least we can help you diagnose, that way, if you take it somewhere you will know if they are telling the truth.

ruby1993red

I do not have a noid light. Can I rent one?

ruby1993red

module 1 = H72 and H74

module 4 = ---

module 9 = ---

module 10 =

1993C4LT1

They are cheap
Let me see if I can find the part number for the lt1 noid light

I.believe the part number is 25143

Connect the noid to fuel injector connector
See if lights up while the engine is cranking.
If it doesn't, opti is bad. Have you checked for spark at the coil?

antfarmer2

Code 72- VSS signal circuit error. Check the VSS and circuit for short to ground or open circuit, a bare wire can cause an intermittent problem. Verify this first. Also check the VSS to make sure no excessive material has built up on the magnetic end, such material from the transmission wearing over a period of time cause deposit fine shavings on sensor head interfering with sensor operation. Wipe clean with paper (not cloth) towel to remove material and reinstall. A newly rebuilt transmission can deposit these quick enough as the transmission is "breaking in". If all else checks out, replace sensor.



Code 73- Pressure control solenoid. (1994-95). Check the pressure solenoid. Normal resistance is between 3-8 ohms at 20C (68F).Replace if out of range. Check lines for damage. Check for clogged filter and replace f necessary.

Code 74- Traction control system (1994-95 F & Y body). Low voltage indicated in traction control circuit. Check for shorted to ground or open circuit.

antfarmer2

is this on a 93?

ruby1993red

yes

ruby1993red

Did not check for spark at the coil.

dizwiz24

Sounds like a bad optisprk.

Convert to a vented setup or you could have the same problem again soon.

Also do some research on which model optisprk is a quality replacement. The oem is hard or impossible to find anymore.

ruby1993red

I purchased a noid light kit. During cranking there is pulsing light. I checked only one injector.

ruby1993red

Got noid light. There is pulsing during cranking. Checked 1 injector.

ruby1993red

Where is the VSS?

ruby1993red

noid does pulse during cranking. check one injector.