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Mamba Still On Top
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I wonder if the cruising condition actually has anything to do with it or if that's just when odds are that you'll see it. Obviously you spend much more time at a cruising throttle than at WOT and even if it was under WOT, I'd tend to think you'd blame a WOT stumble on the tune or something else. Reason I mention it is because if it's a stumble that happens anytime than I'm sure AEM cares about it. However if it's a stumble that happens just while cruising, than they likely don't. In browsing their tech support forum, I've seen them say many times "the Infinity is designed for motorsports use, not for street driving". In other words they will likely dedicate precisely zero resources to fixing this until it affects "motorsports" based customers.

Not trying to start a conspiracy here but AEM support comes across a little fishy sometimes. I have serious doubts that the defective ECU that I sent back to AEM for repairs is the same ECU I got back. I sent away a brand new 506 box that was in flawless condition and received back one that looked like it had been used for years and was covered in grinder marks, yet the serial number remained the same. Despite them claiming that nothing was wrong with my ecu, once I got it back my problems were magically gone. I've talked to 2 other people now who have reported nearly identical interactions with AEM. Point is when they say "we've never seen this before", I don't really believe them...
People for years have been skeptical that AEM replaces boxes and claims "no fault found" and returns units. I too have had a "no fault found" box returned and it magically worked right again. In my instance, the method for determining the box had an issue was hot-swapping it with another unit to confirm the box itself was bad. Same firmware, same tune, just swap the box and the issue was there.

By doing this, maybe they feel it helps to prevent consumers in tight knit car communities from claiming them unreliable. A perception ploy.
 

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I'm running a 508 box and having the issue, it has happened at idle, light cruise and a couple times under boost.

Now, I put more miles on my car then most so the chances of me having it happen under boost are more likely just for the fact that we spend 95% of our time crusing and at idle V.S. the 5% chnace the issue pops up under boost (FYI it is scary as fuck under boost)
interesting, I'm wondering if more will chime in with experiences at WOT. Although it's annoying, it's not the end of the world during cruise conditions but if it's happening at WOT it could be the end of an engine. I don't like the idea of playing Russian Roulette every time I take the car out.


People for years have been skeptical that AEM replaces boxes and claims "no fault found" and returns units. I too have had a "no fault found" box returned and it magically worked right again. In my instance, the method for determining the box had an issue was hot-swapping it with another unit to confirm the box itself was bad. Same firmware, same tune, just swap the box and the issue was there.

By doing this, maybe they feel it helps to prevent consumers in tight knit car communities from claiming them unreliable. A perception ploy.
I concur. It also would help reduce customer complaints about people looking for reimbursements after incurring extra costs. Being in Canada, I had to pay duties when I bought the ecu, then a couple months later had to pay for shipping to AEM then duties a 2nd time when they shipped it back to me. Now I'm out a couple hundred bucks and feel that I was the dumb one for shipping a "non-broken" ecu back to the manufacturer in the first place. Not a great way to do business.
 

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506 in my car, I haven't noticed it under boost but it seems to happens about once every 10 miles. It has happened a few times with no throttle, no idle fuel - rolling down hill, in gear, no throttle at ~3k rpm under engine braking. No burble when the injectors are shut off but the tach still jumps to 0 very briefly and the logs show the same spike in crank signal.
 

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I have the 506 box as well with same issue. Cant wait for a fix to this annoying problem.
 

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Two years to the month since this thread was started and still no solution from AEM. I truly feel for you guys. There are some kick ass cars and owners in this thread. What I mean by that is, this isn't a thread of owners and tuners not knowing what they are doing. My buddy Mike Davis' car (MDSUPERSTAR) is damn near perfect so, knowing how he is, and what he went through to get his car to its current state of perfection, I know how something like this will eat at his ability to fully and completely enjoy his chariot and the fruits of his labor. I'm sure everyone else is in a similar position.

Not that what I say or think matters, but I do hope you guys get this squared away. Although my issues were not EMS related, I went through a long period of chasing ghosts with my red car. We finally got everything squared away and all is right with the world. I wish for the same great outcome for you guys that I have had and hope this experience becomes a dim memory for you going forward.


Ken.
 

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Garage Queen Club
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I've been running the 506 on my Z4 and I honestly never noticed this issue. I drive the car quite often, street, to the store, cruises, and track. I did start with a base cal, but run the VVTI setup. Custom built the entire wiring harness, wire by wire. I did have ignition issues in the beginning (tach jumping, noise on my can-bus), but they went away when I moved to Resistor-style spark plugs.
 

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Boost Addicted.
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My Supra with VVTi setup using 708 with all new engine harness (made by a close friend) and all new sensors since 2 years now without noticing this issue !
I was just having an issue setting up Nissan 350Z DBW throttle and got help from Vlad, then since that its running perfectly.
 

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I have to admit that the issue I was having went away when I installed the PHR digital cam and crank sensors. This seems to be a solid upgrade if you are not running a VVTI motor.

Vlad suggested that I do this and I am glad that I did.
Good to know. I plan on doing this upgrade.
 

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Discussion Starter #70
Nope.


AEM swapped my entire ECU, as they said I had an early adopters version. didnt fix it.
brand new wiring harness. didnt fix it.
tons of new grounds. didnt fix it.
changed sensitivity on the cam and crank sensors. didnt fix it.


this drives me absolutely fucking crazy. it makes me not really want to drive the car. It is especially annoying when you have someone riding in the car for the first time and it happens. shit is embarrassing.

Im open for other ideas if anyone has them..
 

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I have PHR digital cam and crank sensors sitting waiting to go in... will report back once theyre installed however the cars being put away for winter soon so wont be driving it until the spring.
Even if it fixes the issue, I am not at all impressed and probably wouldnt buy another AEM product in the future.

I have a friend that just installed an infinity and did some street tuning last night, his car is a JDM VVTI model and said he didnt have the hiccup.
 

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I have PHR digital cam and crank sensors sitting waiting to go in... will report back once theyre installed however the cars being put away for winter soon so wont be driving it until the spring.
Even if it fixes the issue, I am not at all impressed and probably wouldnt buy another AEM product in the future.

I have a friend that just installed an infinity and did some street tuning last night, his car is a JDM VVTI model and said he didnt have the hiccup.
This was my next step. Ill wait on hearing back from you before buying the PHR kit. I hope it fixes the issue.

Thanks
 

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I have the phr kit, hope to have the car running in a few weeks.
 

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I have PHR digital cam and crank sensors sitting waiting to go in... will report back once theyre installed however the cars being put away for winter soon so wont be driving it until the spring.
Even if it fixes the issue, I am not at all impressed and probably wouldnt buy another AEM product in the future.

I have a friend that just installed an infinity and did some street tuning last night, his car is a JDM VVTI model and said he didnt have the hiccup.
My engine is a JDM VVTI, it has the hiccup. I'm sure your friend's does too, he just hasn't felt it yet.
 

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Anti-Socialism 2016
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I know for a fact there was some issues with these boxes in the past. I sent mine back and they said they did a couple things to the box but wouldn't elaborate on what they did. Now the issue I have was the issue with the car completely dying. I think that issue has been resolved but the hiccups I think could be a result of noise.
 

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Space for sale
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I know for a fact there was some issues with these boxes in the past. I sent mine back and they said they did a couple things to the box but wouldn't elaborate on what they did. Now the issue I have was the issue with the car completely dying. I think that issue has been resolved but the hiccups I think could be a result of noise.
Who do I email to ask about getting mine fixed?
 

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I have this issue for the last 3 seasons, ive replaced the stock ignition system by a r35 coils conversion and the cutting is over !! Engine runs way smoother in lower range and idle !
 
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