I have a 91 RS Camaro 3.1 l , the prob is it is throwing code 43 .
What is it and how do I fix it ,

 

Code 43 is about the knock sensor, I'd start by looking at the connector, after all its a 20 yr old car & the plastic connectors get brittle.

 

if it is the connector broke on the knock sensor you can buy a better style replacement plug from orileys. they tend to have them in stock for like 11 bucks

 

code 43 is "it's not a v8" code
swap asap!
sorry had to give ya crap a minute

 

LOL at that one ...

Thanks guys for the info......

Well I changed the connector and took it to get gas and the damn thing would not start and once I got it started I had to give it gas and ride the brakes .

 

Possibly a bad knock sensor, if it's still giving you code 43. You DID reset the ECM by disconnecting the battery for a minute, didn't you?

 

Strange thing I am getting no codes , and I also did the idle learn procedure .

 

No codes as in none other than code 12, or is there no code 12 as well?

:edited: Apparently it runs, so that was not necessary.

Check for a LARGE vacuum leak somewhere, possibly a disconnected brake booster hose.

 

Had a brain fart on that one , but I did get code 12 .
Will check all hoses today .

 

Well went out to start the troll today and it turned but did not start , I put on the code scanner and I am getting code 12 and no others .

 

In that case, pull a plug and make sure you have spark...

 

I pulled the first plug and getting spark , but there is a lot of residue on it and wet . Also checked fuel pressure an it read 40 psi.

 

Put a new set of plugs in... The ones you have may be too fouled to work. Also put a DMM on every plug wire and make sure none of them reads over 20K ohms. Followed by checking the resistance on each bank of injectors (pink wires to the blue and green wires in the harness connector, engine side, not harness side... yellow and black are for the CTS), should read 4 ohms, or close to it, per bank (left and right side of engine).

 

Well I soaked the plugs in carb cleaner overnight and put a bit of sandpaper to them and reinstalled then and now works like a charm .