Thedog

Got code 43 don't know what it could be I have a new distributor that got put in and still got the code

Injuneer

Nothing to do with the distributor.

DTC 43 is for the knock sensor. Voltage on circuit is not within spec. When the code sets, the PCM uses things like RPM, MAP and throttle position to determine when to retard spark and how much to retard. Basically, you will have knock retard all the time, losing performance.

Pull single wire off knock sensor, key on/engine off, measure voltage between pin in harness and engine block. Should be about 5 Volts. Wire still off sensor, measure resistance between pin in sensor and engine block. Should be in range 3,300-4,500 ohms.

Reconnect harness wire to sensor. Voltage should be in the range of 1.5-3.5 volts.

Shoebox has an LT1 specific code list:

http://shbox.com/1/Dtcs.htm

Thedog

Okay thank you I'll do this first thing tomorrow

Thedog

It was the Knock sensor changed it good as new no check engine light no more

Injuneer

Glad it worked out for you.