sdanville

I was about ready to sell my beloved Civic . its a 2006 260,000 miles. EXL. it started with a rough idle a few months ago. it evolved into the car running so bad it wouldnt go 20 MPH. I would put it in neutral while still rolling..restart and it would run good enough to drive. Codes PO302 PO303.
I looked for vacuum leak, I swapped out the plugs, I swapped out the coils, I added Lucas then Marvel Mystery oil to fuel. Cleaned some grounds. I was ready to order up a throttle body relay, but 1st went to WalMart and bought some CCR mass air flow sensor cleaner. $8 for a twin pack including throttle body spray.. My 2 days of test drives post cleaning have it running perfect. starts -- goes -- no rough idle. Success.\
oh oh.
PREMATURE EVALUATION. DEC. 17 2018. The civic is doing it again. I cleaned the MAS again, this time no change. I will update when I fix it.