like title says, my idle has been low lately, once i drive the car for 30 mins or so the idle will be 500/600 then when fan on 600/700 but theirs times when it drops to 350/400 and lower when it feels like it wants to die...things ive replaced recently


----battery
----head gasket/took head to get resurfecd
----water pump
----timing belt,a/c belt, p/s belt, alternator belt
----sparkplugs
----oil/tranny fluid
----oil filter
----i cleared a few codes i had got the car fixed spent over 400 dollers on sensor/electrical issues....


now after everything ive replaced, my idle sometimes goes really low what could it be?

i got my alternator tested when i got my new battery it sits at 12.6v


could that be my issue?

 

.........

 

perhaps vacuum leak somewhere,heavily corroded battery cables,a ground somewhere not hooked up, iacv function restricted......

 

like i said above i spent over 300 dollers when my car was being worked on for an electrical issue..they trouble shooted and im pretty sure when they did that they over looked all my grounds. i replaced my ect sensors i had a p0117 p0118 codes so im almost positive i dont have a vacuum leak or bad ground....

battery terminals new and battery new

 

again make sure all connections are correct,,i came up with my response with the list of things you had done.sounds to me its an electrical issue.what else do you think could cause this to happen? i do know that them ect,iat,iacv connectors all resemble eachother and fit on other sensors..perhaps one is mismatched..again with the things you had done by a shop i presume,i would go over everything again..ive built motors and ran in to some snags, ive also put some connectors on different sensors as well.seems to me you have the wrong connector on the wrong sensor....or whats happening could just be from an old tired engine,or just get a brand new alternator

 

Alternator should be outputting around 14.2 volts.