Cold start misfire
#42
3rd Gear
Join Date: Feb 2013
Location: Montreal, Canada
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I have the same problem. Acura dealer told me it was normal and nothing to worry about. The scanned it for codes and there was no codes or pending codes.
I don't know if this is really normal as the car has 60 000miles and the problem just started, how is that normal?
I don't know if this is really normal as the car has 60 000miles and the problem just started, how is that normal?
#43
I have the same problem. Acura dealer told me it was normal and nothing to worry about. The scanned it for codes and there was no codes or pending codes.
I don't know if this is really normal as the car has 60 000miles and the problem just started, how is that normal?
I don't know if this is really normal as the car has 60 000miles and the problem just started, how is that normal?
#46
well i dropped it off last monday evening 2/11/13. they diagnosed saying it needed a valve job and sent the heads to a machine shop to have that done. i'm still waiting for the heads to return from the shop so he can install them and go from there. i dont know where he came up with that diagnosis but they are paying for it so if i get a fresh new set of heads then why not. after reading comment #29 on this link https://acurazine.com/forums/2g-rl-2005-2012-76/easy-replace-spark-plugs-looks-846245/ it may be just what it needed. once i find out more later this week i'll update again.
#47
Pro
Coming from a dealership point of view... And being trained by the Honda corporation, I can say no Hondas will misfire to warm up the engine or cat. There's probably no manufacture out there stupid enough to do this. It's easier to raise the idle. You can't monitor o2 readings on start up because the o2s aren't reading until the fuel system goes into closed loop. Higher mileage Hondas that HAVE a misfire on cold start up are usually cured with just a valve adjustment.(assuming plugs and coils are fine). If you feel you have a mis fire with no check engine light. Look at your map voltage. It should stay stable. When cold your looking at 1-1.2 stable bolts. Fully warmed up your looking at .95v stable. Look into bad engine mounts and or the notorious leaking sparkplug grommet in the valve cover. Usually numbers 2/5. It will sound like a loose valve tapping. When in reality it's compression sneaking by the loose spark plug.
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GuLuMoNeY (02-20-2013)
#48
Coming from a dealership point of view... And being trained by the Honda corporation, I can say no Hondas will misfire to warm up the engine or cat. There's probably no manufacture out there stupid enough to do this. It's easier to raise the idle. You can't monitor o2 readings on start up because the o2s aren't reading until the fuel system goes into closed loop. Higher mileage Hondas that HAVE a misfire on cold start up are usually cured with just a valve adjustment.(assuming plugs and coils are fine). If you feel you have a mis fire with no check engine light. Look at your map voltage. It should stay stable. When cold your looking at 1-1.2 stable bolts. Fully warmed up your looking at .95v stable. Look into bad engine mounts and or the notorious leaking sparkplug grommet in the valve cover. Usually numbers 2/5. It will sound like a loose valve tapping. When in reality it's compression sneaking by the loose spark plug.
Thanks
#49
Pro
Testing MAP voltage should be done in park and all loads off. Of its not registering any misfires on the data list, not sure what else you tell you after that, but good luck!
#50
I have a 2007 Acura RL with 152,000 miles which has been "misfiring" during a cold start ever since I bought it. I also have a 2002 Honda Odyssey with the similar J series V6 that also misfires at cold start up and the odyssey has 190,000 miles. When both of these cars warm up they run smooth as silk. I think this is normal ECU programming and you have nothing to worry about unless you have an engine light as mentioned by another person on this forum. Remember the Honda J Series V6 is a bulletproof design and will even "outlive" any other engine on the road.
#51
I've read the paper on it already. I don't really hang out at smog shops often. I'm satisfied with what I read, if you really want proof, research it. I've never seen it online but I have seen it from what I consider a better source. What do I have to gain by lying about whether or not a car misfires when cold? It's not one of life's great questions mysteries.
I was talking with the guy just a month ago. He's now one of the "smog police", kind of on the other side of things now but we were going over some of this stuff and the misfires were brought up. That's what I hate in this day and time, you can read it in an official manual but if it's not online it's not true.
I was talking with the guy just a month ago. He's now one of the "smog police", kind of on the other side of things now but we were going over some of this stuff and the misfires were brought up. That's what I hate in this day and time, you can read it in an official manual but if it's not online it's not true.
No, the vehicle will NOT INTENTIONALLY misfire for a period of time "to warm the cats". You read that approximately NOWHERE. Please sell your tools.
#52
I look forward to your uneducated response.
Last edited by mb.3g; 02-25-2019 at 07:42 AM.
#53
Uhhhhh heads up, yes the TL does in fact misfire on cold starts to warm the catalytic converters up. It seems like you should sell your tools or get more familiar with Google. Quick to hurl out insults, even though you're wrong lol.
I look forward to your uneducated response.
I look forward to your uneducated response.
#54
Lmao you're the one that came in here claiming BS. If you know so much, please share.
Not sure why you are so convinced otherwise (or why you think you are right). Lots of cars do this. Not really that far-fetched.
Oh yeah, there's also this whole forum that will disagree with you.
Not sure why you are so convinced otherwise (or why you think you are right). Lots of cars do this. Not really that far-fetched.
Oh yeah, there's also this whole forum that will disagree with you.
Last edited by mb.3g; 03-01-2019 at 04:58 AM.
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