Hello, fellow fit freak new to the community here. I hope someone can help me out?

I bought a 2009 fit sport a few months ago 73000kms. Was running great but then noticed rough idle in gear when car was at N.O.T and also hard start (engine turn over a couple of times before start)

it has new plugs and coil packs, pcv vavle, cleaned intake, egr vavle and throttle body, new air filter, and vavle adjustment. Also checked compression which was good. Used injector cleaner in fuel and have been filling up with 93 octane for the last two fill ups
Vavle lashes were off a bit adjusted them and it did help the idle a little but still is rough.
had a engine light on for multiple cylinder misfire before vavle adjustment.

Any takes or similar experiences? I am things maybe fuel delivery system?

 

With this car, I'd re-check spark plugs. Common cause of misfire. Did the plugs get the anti-seize treatment when installed? Did they get torqued to at least 18ftlbs?

I realize the fit is aging and eventually I'll have to do more than valve adjustments and plugs, filters, fluids, but..this thing really has had no engine problems that weren't solved with plugs and a valve adjustment. Oh! until recently!! My PCV valve was gooped and causing squealing/engine pressure build-up that mimicked low oil sounds while driving. after 105k miles. Diagnosed by pulling the dipstick while idling to verify oil level. Heard a woosh. I removed and cleaned it with brake clean and compressed air because it's all metal... I wish everyone drove a fit 😂

 

Thanks appreciate the tip!!
They were a little loose I torqued them up took it for a test drive rough idle did go down.
fingers crossed it stay that way haha.

Must be a common thing for them to shake loose?

 

It's a split issue. A number of people have made threads to tell their story on the matter. I'm still trying to push my poll thread to answer that question fairly and irrefutably. you can find that thread here (on this forum) and log your experience. There was a TSB put out for under-torqued plugs when the cars left the factory, but it didn't account for a number of people who experienced issues here.
Some had ejections and managed to get significantly reduced remedial service cost by bringing said TSB to the dealer's attention. Years back I received and posted up a dealership print-out from Escondido, CA citing a torque spec of 20ftlbs with no mention of anti-seize. The proper way to address the issue is still kinda up in the air, but I think we're all in agreement on the higher torque, and I'd personally advocate against using anti-seize.
despite this hot topic, i think we're all in agreement that the car is pretty freakin bullet-proof.

 

So turns out it wasn’t the spark plugs, after head scratching and hours of diagnoses took it to the dealership, let them have a crack at it they were as confused as I was haha. Seemed like they were going to give up but they hooked up a smoker and found it was a leaking egr valve,

the valve itself was working but there was a small crack between the housing and the mounting bracket… it would cause cylinder 1 to misfire the cause of other to misfire at idle. Hope this helps anyone with a mysterious rough idle