Does this look like a crank sensor alignment issue or something else? I only get the issue at ~3500 rpm. The 99 crank sensor is a credit-card thickness from the tooth, maybe I need to pick up new feelers since the old ones were lost int he move. I'm guessing the swap between going high and low tells the story.

Thanks for the help.

 

OP is a caring lover, 10/10 would hire again

 

Did you get lost? This is not the cycling section.

 

[Insert Mel Gibson quote here]

 

 

Does it happen both when warm and cold?

 

Not to threadjack, but I've been having intermittent sync loss on my 2000 miata when the car is cold (below ~70c water temp). Does the car being cool indicate a specific issue?

It seems like it usually happens under light acceleration and I typically get somewhere between none and 5 counts until the car warms up. I keep messing with the crank sensor gap without any luck.

 

Yes. I remember previously that fouled plugs would whack-out the tach on a 1.6, but I believe I now have the tach driven from the CKP. Regardless, I'm changing plugs today, measuring gap on the CKP tomorrow and putting it at .030". I don't know what causes the logger to swap from high to low like that.

 

Are the pots adjusted correctly? And space the sensor with a business card. That's close enough.

 

Pits? Arm pits? Like your av?

I've done the credit card adjustment, no deal.

 

he meant to say pots. the pots inside the ms. he might be right. doesn't sound like it's a spacing issue, so either it's the unit, the sensor, or the wiring.

id check wiring and pots adjustment first (free)
then replace the sensor

 

Thanks a ton. I should note I had no problems before the car sat four years, but open to trying anything at this point.

 

Yes pots. What kind of megasquirt is it? If it's an mslabs unit then nvm.

I've got a spare sensor or 2 I could loan you. Would just want it replaced if it fixes it.

 

this is hustler you're talking to. ms labs was still swimming in rev's loins when he built this thing

 

Yep, ~2012 MSLabs MS3. Thanks for the offer but I think there is a spare sensor somewhere, in some box, from the move. I'm sure it's something super simple I overlooked. I can't remember most of what I need to from so long ago now that I'm a spandex clad bike saddle sniffer.

 

Maybe @Matt Cramer or @Ben might have some insight on why the logger flipped like that.

 

OMG!
The prodigal son hath returned.

 

In most cases, it's sensor failure.

 

Okay, sensor is .030" from crank teefers and I still have the same log, how do I check a CKP if it's faulty when it seems to work well at low RPM rather than high?

 

borrow known good one and test