





Diagnosis help! Honda
2011 Honda Accord V6 3.5L 175,000 miles
This car has had a rough idle for quite some time.
Recently I took it to a shop to get the timing belt, valves adjusted and diagnosis of rough idle.
Ive also recently done spark plugs, throttle body cleaning, fuel injector cleaner, oil change myself.
The shop told me that the MAF was causing my rough idle and they’d also replace a CAT that has been messed up since I’ve had the thing. I agreed to the price and after driving it home and letting it idle hot for a little, the idle is even worse now than when I sent it in. It’s very steady, but idles around 650(I think 750 should be the target)with no load and the car vibrates a TON. After bringing it in, I also had a lean condition on bank 1.
I’m worried they might’ve adjusted the valves too tight or messed up the timing. I’ve tried to swap MAF again after them and it hasn’t helped. I have a lot of pics of scanner values. All pics but one were taken at Idle.