Lazy Tom

They ate up the wires on my 95. They cut the throttle position sensor wires and the four wire sensor under the throttle (IAT?) I think.

I have replaced the pigtails but it won't start. I'm sure the wiring is correct.

It cranks but it won't start. Fuel pump runs.

Could it be the VATs? Would cutting wires trigger the VAT?

JimLentz

What is the Security light doing? I think VATS disables the starter too along with injectors.

pcolt94

I would back probe the connector for the TPS with a meter on the dark blue wire. Should be 0.6 at closed throttle.

If it cranks , then it's not VATS. The 4 wire connector is for the IAC.

First check for spark and go from there.
Just on principal check the fuses for the PCM, coil and injectors.

You can unplug the IAC and it should still try to start and probably run.

Check the wires for the opti since they are so close to where the damage was. If a opti wire was cut, it could definitely cause the engine not to start. It would kill spark and injector pulses. Make sure it's still plugged in all the way.

Lazy Tom

Thanks Jim, Colt, Dogs,

They only chomped on those two sensors. Didn't get the Opti, coil, ign mod. They did break the big clip on top of the computer. Connector is just pushed in but seems good. I will troubleshoot using those methods tomorrow.

Thanks for your help.
Tom

Lazy Tom

Fuel pump working. New.
The ignition is working.
I get .9V at the blue wire.
Fuses at passenger door and next to battery are good.
Opti is pugged in withwires intact.
I've tried to start it with IAT disconnected.
Where else are there critical wires?
I'm missing something.
Thanks.

Lazy Tom

C12 is the only code indicated.

1stVetteFinally

Have you checked to see if you are actually getting spark on the spark plugs?

pcolt94

Also check for spark off the coil itself.

If spark is there, then you will need to actually measure the fuel pressure and the injector pulses with a noid light.

Lazy Tom

It is indicating a code. I thought it wasn't because I disconnected the battery.

It is the H12 code. I know this is the distributor. It is firing but it must not be fueling.

The distributor and water pump were replaced this past summer.

There is antifreeze under the engine. It has 50/50 antifreeze. IDK. Still working.

Lazy Tom

I just checked the antifreeze. It's good for 20 below. It didn't freeze. It not much. It's always leaking something.

I felt under distributor and it was dry.

I'm going to re re re re re check the wires to Opti.

Lazy Tom

The engine has spark.

Noid light not flashing.

H12 code.

Fuses are good.

I can't believe that Optigrab is bad with less than 1000 miles on it. (Advance Auto Parts). Lifetime warranty PITA to fix.

Any more ideas?

Lazy Tom

Does the fuel injection have a relay?

Lazy Tom

I redid the TPS wires and it is working right now. It goes from 0.6 to 4.0 when you operate throttle.

NOID light is flashing.

It has fire and fuel.

Why won't it start?

Thanks

Lazy Tom

The blue wire voltage ranges from 0.4 to 6.0 when throttle is opened.
Plugs are firing.
NOID light flashes.
But I won't start.
Could it still be stuck in the clear flood mode ?
I'm stumped.

Ed Ramberger

Just out of curiosity - you checked all fuses correct?

Lazy Tom

Yes I checked all fuses.

Lazy Tom

Even though I put a spark plug connected to a wire on top of the intake and watched it fire it was the coil wire.

I saw where the little bastard bit it but it was only a tiny nick. But it cut the inside of it somehow.

Park you cars inside! They are up my John Deere too. It's war.

Churchkey

Siberian Huskies are great varmint killers I have shoveled the partial remains of possum, coon, squirrel, cats rats, ducks & birds. If you have chickens keep them fenced they like them too. Neighbors ferret escaped the house the Huskies got it.

billschroeder5842

Nobody beats "the Boris" for automotive pest protection. Nothing gets past him.

ghoastrider1

car needs three things to run. Fuel in correct amounts, air, fire at the correct time. make sure the first two are correct,