Hi,

I recently purchased a 1987 Firebird 5.7 Liter as-is. Car only has 75K miles on it.
I put a new battery in and turned the key. It barely ran and then stalled out. I checked the fuel gauge and it said I had a quarter tank. I thought the fuel pump was bad so I replaced it and also found out that there was no gas in the tank to begin with. The only thing in there was what looked like injector cleaner. That most likely explains why it smoked so much when I started it.

So I installed the new pump and sending unit and filled with gas. Tryed to turn over, but nothing. After a while the starter began to click and I realized the vehicle was Hydro Locking, from an overload of gas in the system.

In that time period I have replaced the Coil, Ignition box (on the distributor), fuel pressure regulator, Coolant sensor and Bosch +4 spark plugs.I have a nice fat spark.

I partially took out the fuel rails with the injectors and turned the key for one click. Each injector shot out about 1/4 of a bottle of water into the engine. I now have a ton of gas in my oil and still have a lockup problem.

I don't know what's wrong and am getting pissed off. Is it a bad ecm?

Anyhelp would be appreciated
Thanks,
Josh

 

Also, I have a check engine light. When I hook up the two terminals on the OBD1 I get the error code 12. No other numbers, I don't know why. Also the cooling fans for the radiator randomly turn on???

 

well 12 is the "clear" code, could be a FPR, injectors, or ECM

 

Sounds like the injectors are leaking. Do you have a fuel pressure guage. hook it up to the fuel rail and when you crank should have above 36 psi. If you don't there is a problem. Also if you crank and do have 36 psi but as soon as you stop or shortly after the pressure on the gauge drops to zero then the injectors are leaking and fluiding the motor.

 

you can also run the engine for a minute or two, then turn it off and pull the plugs,
if you have wet cylinders you have leaky injectors

 

he could do that but he can't get it to start....don't just start throwing parts at it though. diagnose and fix it once, it will save you time, and money, and in this enonomy you gotta save yourself a little money

 

I just took out all the spark plugs, unplugged the injectors. I turned the key for a few seconds and there was some gas that blew out onto the manifold. However the injectors are not leaking. I also just changed the oil and it had at least 2 quarts of gas that mixed with it.

I wouldn't know what to diagnose. I know that I have spark and the injectors are not leaking. Somethings telling the computer to give more gas??? I was told by a mechanic to test the temperature coolant sensor, and I just replaced it.

 

Should I only be getting the code 12 when I connect the wire for the check engine light? Also does it mean anything if the cooling fans turn on when I check the codes?

 

Also, I bought the car as-is and I believe that alot of mods were done and it has newer injectors on it. Could the ECM have been modded to give more fuel?

 

I just cleaned out the cylinders, put new oil in and disconnected the injector wires and it started right up. Well then it died, so I reconnected the wires and I caught the underside of the car on fire. I was video taping it. Maybe this can be helpful in solving the problem. Could the MAF sensor be causing this problem. Anyways I will post the video up soon.

 

Here's The vid

http://www.youtube.com/watch?v=N1dwvEqrkJA

 

Well thanks guys for the "HELP"

Anyways, I found a link to another forum and this one helped me. https://www.thirdgen.org/forums/tpi/...-flooding.html
I tested the wires that connect to the injectors and they were hot when the key was on the run position, however the car wasn't running. I ended up buying a remanufactured one and it worked.

-Josh

 

Yes if there are no codes present.12 flashing means computer is correctly in diagnostic mode

Fan(s) always run when ECM in diagnostic mode

 

The weird thing was that the check engine light was on?? Isn't it supposed to give a trouble code if the light is on. Anyways I think it may have been because of the bad ecm.