codes 21 and 32

[mluczaj22]

anyone had these two codes pop up together consistantly on a cali emissions pathy? im having trouble tracking down the problem after these parts have been replaced. the codes just keep coming back.

[Slartibartfast]

Ignition signal and EGR?

 

If new sensors don't solve the problem, either there's a problem with the harness or something's wrong with what the sensors monitor. I'd check the plugs first, make sure they're not corroded

[mluczaj22]

yeah its driving me nuts. ive done all checks per fsm and everything checks out good. after a day they both come back.

[Tungsten]

That looks like a fun one. Can you list what you already did exactly?

[mluczaj22]

new coil,resistor,egr valve and hoses. also egr solenoid. im thinking i have more crud in the egr line and intake. it was very gummed up.

[silverton]

code 21 could also be caused by distributor cap, rotor, spark plug wires, and the spark plugs.

[Tungsten]

 

Most likely just a crack in the cap or a glazed rotor.

[mluczaj22]

its fixed. the egr port was clogged where it meets with the mixture heater plate. not much room in there at all. bad design. ignition code has vanished too. strange.

[Kingman]

Those are almost always clogged.

[mluczaj22]

never had this issue with my 87 hb. but i also maintained it alot. i used the egr valve from my hb and it was nice and clean. i just wasnt sure how common it was.