Engine doesnt start smoothly???

[Eddie]

wow,

i thought i was the only guy that has the problem.
mine does it every time. about 4 to 5 crank to start the engine.

i thought it was the battery. now i know it's a common problem

[aaronng]

Well, the TSX guys say that it is to limit emissions coming out when starting.

[EuroDude]

Aaron didnt you earth the alternator or engine or something, and the problem improved in your car?

[aaronng]

Aaron didnt you earth the alternator or engine or something, and the problem improved in your car?

I also started letting my car idle for 10 seconds before turning the engine off around then. I think doing this had more effect than the grounding alone because there has been once or twice recently where I turned the engine off straight away after stopping and I did encounter the hard starting problem. Also, I am now using a 430CCA battery as well.

[EuroDude]

So I guess its an emissions thing after all. I'm having a guess and saying its the exhaust recycling system.

[aaronng]

Nono, the emissions thing is the engine needing about 3-4 crank cycles before it starts (older F22 Accords would start with just 1 crank cycle). The struggling to start (very low RPM that stutters up to idle speed) issue is different. It's the 2nd issue that I "solved" by letting the engine idle for 10 seconds before turning off.

[EuroDude]

Well if you think about it, if the left over exhaust is recycled back into the cylinders during cranking, there will be nearly no oxygen in the intake, resulting in a dodgy initial startup - hence low RPM.
If you idle before turning off the engine, the exhaust wouldnt be recycled during that time, which could explain why the engine starts quicker if you idle for a moment before shutting off the engine.

[blk05gli]

tried the 10 sec idling before switch off, hard starting problem seems to have gone away

[aaronng]

Well if you think about it, if the left over exhaust is recycled back into the cylinders during cranking, there will be nearly no oxygen in the intake, resulting in a dodgy initial startup - hence low RPM.
If you idle before turning off the engine, the exhaust wouldnt be recycled during that time, which could explain why the engine starts quicker if you idle for a moment before shutting off the engine.

What do you mean by recycled? The k24a3 engine doesn't have exhaust gas recirculation (EGR). Only the Accord and CRV's k24a1 and k24a4 have EGR.

[aaronng]

tried the 10 sec idling before switch off, hard starting problem seems to have gone away

Glad to know it works. I am guessing that the idling allows the excess fuel to burn off. When you slow down the car and fully stop, you can actually notice the RPM sitting at about 800rpm before slowly settling back down to 650rpm. So I think that the moment you stop the car with your foot off the accelerator, the electronic throttle actually keeps the throttle open more than needed for just idling, resulting in more fuel being pumped in. If you turn the engine off at this point, the excess fuel is not burnt and it just wets the cylinder/plugs. That's probably why the problem happens only during warm starts but not on cold starts in the morning.

[EuroDude]

What do you mean by recycled? The k24a3 engine doesn't have exhaust gas recirculation (EGR). Only the Accord and CRV's k24a1 and k24a4 have EGR.

hmm u sure about that? I though all K24's had EGR

[aaronng]

hmm u sure about that? I though all K24's had EGR

Yes, 100% sure. On the Euro, only the K20A6, which we don't get in Australia (sold in Japan and Europe) has EGR. Take off your intake manifold cover. You'll see only 1 tube inlet on the "EGR plate". That inlet is for the PCV system. On the K20A6, there are 2 tube inlets, one for PCV and the other for the EGR.