Anyone know the AEM EMS fairly well? I'm not able to start my car.

[1997 GA16DE]

Quick rundown, Nissan VQ35DE engine with AEM standalone. AEM is coming on and connecting to my laptop. Looking for some ideas.

The car has run for almost 2 years great, never a real issue. I was coming home last night, came up on a long empty straight and decided to open it up to, say for example, top of 3rd gear. I then slowed down rather quickly (just brakes, not engine, clutch was in) I have pretty large brakes and grippy tires. I looked down and the engine had stalled during slow down. I made sure all the electronics were on and popped the clutch in 2nd or 3rd, I read some RPMs on the dash, but the engine didn't kick over. Reset all of my electronics/ECU, tried to pop the clutch again, same thing, RPMs read, but the engine wouldn't hold its own, didn't help to press the gas.

I also tried clutch in and start with the key, just cranking, no starting. Alternator was running fine at 14-14.5V, new battery. Engine cranks fine, but no start, every so often, I get a LOUD backfire when starting, which is actually somewhat normal on my setup, I have header to resonator to dump.

I pulled out the plugs to check them out. I only pulled 2 plugs so far, will pull the rest once I remove my manifold. They were a tad bit loose for my taste, but they looked fine/average worn. I put the boot on, grounded the plug. I am getting a spark, but it looks very weak. Keep in mind, I have individual coil packs. I'm getting +/-12V to the coil and a negative trigger signal. I run a wasted spark, 3 drivers, 6 cylinders, I can't tell if I'm getting both because the spark looks kinda weak. I still think the engine could start on this spark.

I could smell gasoline in the 2 cylinders and a poof of air when I crank. Once I get the I.M. Off I'm going to replace all the plugs and check the compression. What else should I check while I'm at it? A test light confirmed I'm getting a signal for the injector and a signal for the spark, but I only tested 1 cylinder so far, more to do.

I checked the AEM EMS software on my laptop, I don't know it that well, but I am reading about 150RPM when I crank, the injector signals look fine according to the software, but I didn't do a data analysis. Also, someone already suggested to check for 'Sync OK', I'll do that tomorrow.

[bvh]

drew at dark side can help

[1997 GA16DE]

drew at dark side can help

I finally got it fixed. I had figured that all timing was taken care of by the Cam angle sensors. Turns out, when I hit the brakes, the car decelerated so fast it dislodged the crank pos sensor. The crank sensor was half way out and it was only getting a weak signal off of the flywheel.

Anyhow, it's running fantastic, now. Better than before.

[senor honda]

Thanks for posting what you found. That's how we all get smarter.-Bob