[mattie170]

Hi all,

Had an Aem ems installed and mapped yesterday but got a some questions about started. It takes more to start it now when warm about double the time but when cold this morning I wasn't sure it was going to start and when it did manage to fire I had to give it a couple of revs to keep it going. Is this normal?

Cheers

Matt

[MB]

Hi Matt,

Try this method. Turn the key until the speedo flicks all the way back to zero, then push the start.

I think all AEMs are like this.

If you try and start too quickly, it does t like it. Suspect it's due to the time it takes to power up.

[mattie170]

Mark,

I have read you said that before and it makes no difference. This morning I let the cluster reset to zero and it still took about 10 seconds of cranking for it to fire! It use to fire immediately.

Matt

[MB]

That isn't healthy then. I'd contact the mapper (mase I guess)

Should start perfect every time whatever the weather.

Did you just have the AEM fitted or had you had it a while?

[mattie170]

I'm half tempted to just plug the original ecu back in. Yeah it was, just waiting to hear back as there is a judder in the map at around 3k on slight throttle whilst slowing. Made nice power tho, 214.5hp.

Matt

[mattie170]

He brought it over with him (new unit)

[Suits]

I have the same AEM and it does the same thing.

It's a characteristic of them apparently.

Romain mapped it first and told me about the firing issue.

Then when MASE mapped my car I told him about the issue and he told me it was a characteristic also.

In the cold weather its much worse, I often have to try and start it twice, but in the summer it will be perfect and fire every time first time (on the second turnover though).

[Kitesurfer s2000]

My crappy greddy emu starts fine, i cant beleve its good at something :-)

[mattie170]

When i started it this morning it was like starting a old car with no choke. If this is how it is then I will change the ecu. It wasn't even cold this morning. It takes twice as long as it use to even when the car is warm. What revs does yours go too when first started and cold?

[S2000_FUN]

It's a characteristic of the AEM ecu. In order to syncronize the ECU, the whole crank must turn one time completely every time you start the car while in the OEM ECU it does not need this. It's perfectly normal. Mine does the same. As far as the difference with the weather is true on cold weather it gets worst. There are many variables with the AEM ECU to make the engine start easier. Tell your tuner to check all these

[Suits]

 mattie170, on 22 January 2012 - 11:43 AM, said:

When i started it this morning it was like starting a old car with no choke. If this is how it is then I will change the ecu. It wasn't even cold this morning. It takes twice as long as it use to even when the car is warm. What revs does yours go too when first started and cold?

I think it's about 2000rpm, but I never really checked as the car runs very smooth.

It is a pain, but that's the only downside to it.

Try putting your foot on the clutch when you start it, the reduce pull might be enough to start it easier for you. I have to do this as my car is a JDM anyway.

[mattie170]

Mine is only at 1600, use to go to 2k. I always start it with my foot on the clutch anyway.

[MB]

IMO its not right. 10 cranks is too much. Mine fires almost straight away with Romain map, and same on my old Mase map. It's a bit more than OEM but not much.

[D2 TEX]

Mine starts pretty much straight away no matter what the weather. Obviously needs the one rotation but it fires up a treat then

[mattie170]

Did a little video this morning of it starting. It was better than yesterday morning. Video is really bad as on my phone and forgot to put my lights on. Once started it was ticking over at 1600 rpm. The coolant gauge does funny things also is this normal, this morning it told me is was warm after about 20 seconds of being in the car then it went back to cold!!!!

[eSeM]

That is only slightly longer than my car takes to start up in the morning.

[MB]

Mine starts in a few turns, so IMO yours isn't right.

The coolant should aslo act as normal, unless it's not been calibrated correctly. I have a V1 AEM so I have to use a seperate piece of hardware, but it's perfect. IIRC the V2 does the coolant display on the S2000.

If your coolant is playing up, it will probably have an effect on the fuel starting trims, which could be your problem.

Send Mase a log file (if he mapped it) and he might be able to sort it out.

I'm surprised this wasn't left perfect though Not the first time i've heard of things not being right.

[S2000_FUN]

One more reason why your car does not start up quicker is that your battery is not in the best condition and does not have much cranking power. Your dash should not flash on start up. This is an evidence that your battery is not in good condition and does not have enough power to maintain the rest of lights in the car on start up. You will get dimm lights on start up due to a lot of current being drawn from the battery but not flashing dash

[KingRevo]

Aaaaand this is why I wouldn't get my car mapped by somone who's in the country 4 days a year.

Hope you get it sorted.

[MB]

S2000Fun, I had also though the battery may not be good, but that should have been picked up during mapping start tests? I guess if it's been on the dyno, the battery will be taking a lot of load and therefore fully charged though. So if it's only a starting issue from cold, and not a hot restart issue then the battery could be to blame. Coolant temp issues make me think there might be a setup issue though.

Either way, log file to Mase will tell you.

[S2000_FUN]

 MB, on 23 January 2012 - 04:59 AM, said:

S2000Fun, I had also though the battery may not be good, but that should have been picked up during mapping start tests? I guess if it's been on the dyno, the battery will be taking a lot of load and therefore fully charged though. So if it's only a starting issue from cold, and not a hot restart issue then the battery could be to blame. Coolant temp issues make me think there might be a setup issue though.

Either way, log file to Mase will tell you.

Yes it should have being picked up on the mapping start tests but i doubt the tuner did any serious mapping start tests. A simple battery current measurement after a whole day without moving the car will show the condition of the battery. The coolant temperature problem is normal with AEM. He has to buy a modifry coolant temperature fix and calibrate it.

[MB]

Not on the V2 AEM, it's compatible with the S2000 coolant temp without Modifry IIRC.

[S2000_FUN]

 MB, on 23 January 2012 - 05:19 AM, said:

Not on the V2 AEM, it's compatible with the S2000 coolant temp without Modifry IIRC.

You are absolutely right I am sorry for the wrong info. I never realized the topic was for AEM V2 . As i am not so familiar with V2 i do not know if you have to calibrate the cooland temperature from the AEM softtware or it is ready fixed calibrated from the factory

[mattie170]

I did also think about the battery but the stock ecu would fire in under half a turn the morning before, so it must be the ecu! Lesson learned hey, I was told to stay clear of the aem but everyone raved about it so gave it ago.

[S2000_FUN]

 mattie170, on 23 January 2012 - 05:44 AM, said:

I did also think about the battery but the stock ecu would fire in under half a turn the morning before, so it must be the ecu! Lesson learned hey, I was told to stay clear of the aem but everyone raved about it so gave it ago.

It's also your battery. And as far as the AEM there are many people who are using it without any issues, me too. You just have to find a good tuner and all you problems will be solved.