alright so i already replaced iacv sensor and the coolant temp sensor the one under the dizzy so what else could it be any help will help

 

any cel lights on? you can always give your car a round of seafoam cleaning and see if that helps

 

yea it is throwing a cel ill look nd post them tomorrow .

 

codes it is throwing p1509 iac valve circut failure
and p0135 a/f sensor1 heater system malfuntion

 

Reset the ECU and then check whether either of the codes repeats. Post any code that repeats.

Also give a more detailed description of the rough idle.

 

Alright I will do that

 

Alright I reset the ecu and they both came back I'm gana replace the o 2 sensor now

 

Don't just replace parts, do some electrical tests to pinpoint the problems.

What car?

Is 7.5A dash fuse 15 blown?

What's the resistance of the O2 sensor heater element? Does it get voltage?

Is the IACV plugged in? Does its plug get voltage?

 

Alright I'm gana go buy a test tool to test all the above