95 4cyl. probe

[pappyfreebird]

runs fine,,,friends had it 6 yrs,,, n over 50 check engine has aways came on ..he said never did anything n his mech sez fergit it ...anyways i bought it for my daughter..as said runs fine light will come on at speeds...howerver new issue n one i question is once in awhile car will start,,,, n idle will hump up n down erratic...then be fine ..may do it right away may be a few daze...aways runs fine jus will idle strange...any input...air cleaners clean maf is clean..the iat is purty hard ta unplug ta test...any common this is it type things ...thanks pappy

[rhandwor]

Go to Advanced or Auto Zone and get it checked for codes. Then tell what they are. They do this as a free service.

[pappyfreebird]

update : cleaned the maf ...no diff. replaced wid junkyard maf...no diff... cleaned iac no diff...replaced wid junkyard iac n seems to have cured the humpin idle n dying now n then issue...one note my maf n iac were nice n clean the junkyard ones were nasty black goo...but seems there iac werks n mine dint thanks guys paps