NvMySi

Hey guys so my Acura TL has misfire 1, 2, and 4 and some other catalyst codes with it
running rough and loss of power, while running I unplugged coil pack one at a time and plugged it back in, looks look front both cylinders are not running, closest to passenger side in assuming that痴 cylinder 1 and 2
changed coil packs nothing changed spark plugs nothing fit same issue, what are the changes that the valves are burnt in both cylinders ? Is there a way to check ? If their burnt I値l just swap my spare motor into it
many help would be great thanks

P.S engine light was blinking

Gumby309

Bank 1 is closest to firewall. Has cylinders 123.
bank 2 is closest to radiator. Has cylinder 456.

Id check coilpacks aagin. And if you changed plugs already, id adjust valves if coilpack doesnt fix issue.

Thats what id do before even thinking bout swapping motor

NvMySi

why adjust valves ? It has nothing to do with misfire

Gumby309

Up to you brother. Just letting you know what i would do.

NvMySi

Just an update, car no longer stays running it flutters, when trying to start it just dies right away any input ?

Jackass

Does it have fuel? Does it have spark? Is the timing all dorked up? Did the TB tensioner fail? Did the ECU get wet? There are lots of things that could be wrong here. We can't really diagnose over the Internet with the extremely limited amount of info provided.

Gumby309

Could be alot of things. Cats could be cloggedd too

NvMySi

yes has fuel and spark, timing belt tensioner was done 20,000 miles ago at Acura Dealer
nothing wet behind the dash where the ecu is carpet is dry
so I知 really confused and making me thing it痴 burnt exhaust valves

NvMySi

would this cause it to run on 4 cylinders ?

NvMySi

Car also no longer cranks has oil so it didn稚 run out of oil

Jackass

Does the starter even engage? Is it engaging, but can't spin the engine?

losiglow

iTrader: (1)

Bad valves can cause misfires due to the air/fuel escaping or incorrect amount of fuel/air entering the cylinder.

Did it start all of a sudden or was it a gradual process where the engine slowly started running worse and worse?

Unfortunately it could be so many things. Could be bad gas or a bad fuel pump not providing enough fuel pressure. That fact that it is fluttering means it's at least got some ignition.

I'm not a pro, but one of the first things I'd do is make sure all coils/plugs are providing a spark. This can simply be done by removing the coil and attaching a plug, having someone try to start the car, then watching for a spark. Be careful though. Wear gloves and keep it away from metal parts of the car. Do that with each coil. You'll want to use the corresponding plug since it could be the plug or the coil.

I would then consider having the fuel pump pressure checked. You'll have to get a fuel pressure tester. And you'd have to do a bit of disassembly including removing the intake manifold and throttle body. I've never had to do that before but I know that Harbor Freight sells a cheapo one. That would be cheaper than having it towed to a mechanic. I don't know what the spec fuel pressure is for the TL but I'd guess 40psi - 50psi. Fuel pumps don't go out much on Honda's but your car is 16 years old. They don't last forever.

Could also be bad gas. I'm not sure how to drain the tank but doing that, then filling up with good clean gas might be worth a try.

After that I'd start checking timing and valves. That gets more complicated. To check timing, you can open the little rubber panels on the timing belt covers, turn the crank with a large ratchet, 19mm socket(?) and a large extension. Clockwise only BTW. Line up the little mark on the camshaft gear with the mark on the timing belt cover. Once you have the two lined up, look at the crank pulley and also make sure it lines up correctly. I think there's a mark that lines up with another on the cover, or maybe the engine block? I can't remember.

But I doubt it's timing. Not unless something really bad happened to the belt, tensioner or pulleys.

El_Cheapo

I agree with you.

Valve adjustment will not fix a misfire, but for some reason people keep recommending it.

Unfortunately, you seem to be all over the place without much background info.

Does the starter engage?

Did you check if the engine is seized?

You can try to jump the starter just to check it turns over.

can you communicate with the PCM with a scanner?

NvMySi

yes scanner communicates with PCM, I知 going to check tomorrow if Engine is seized I have it parked in storage heading out there tomorrow
I値l also jump starter to make sure thanks

Tab King

My issue was similar but this video showed how to fix mines idk if yours is similar

mintymonty

Hey man just checking to see if you have an update on your misfire problem. i知 sure it would help others out with similar situations. including myself. best of luck