My 1986 chevy iroc has been in storage for about 7 months. I started the car and it ran great for awhile, shut it off to wash it. Then when I started it up again, it had a very rough idle 400 to 1500,( a surge) I try to push on the gass and it dies, if i pump the gass it back fires and dies. I put new gass in it and changed the fuel filter..nothing still the same. i got a code 12, 22 and 54 all low voltage codes, i think because of the irradict rpm at idle...Any ideas i need to get this fixed before Cristy's birthday nov 30. She loves driving this car and i don't waqnt to go broke takin it to a shop
email chevydude@hotmail.com or tj35@hotmail.com thanks

 

Get the battery & alternator checked at Auto parts store that dose this service (free).

 

Code 12: No reference pulses to Electronic Control Module (ECM). Getting this ignition code is normal because the engine isn't running.
Code 22: Low voltage at throttle positon sensor OR Fuel cutoff relay circuit open or shorted to ground.
Code 54: Low voltage at fuel pump OR Low voltage at Fuel pump relay OR Output failure at quad driver module.
Before you do anything else, check to make sure you don't have any blown fuses. I believe your ECM runs off of 2 fuses, one for the quad drivers, and the other for it's memory.

 

and by washing it, do you mean a garden hose to the outside or a pressure washer under the hood?