Carrera95

While troubleshooting my no start on a 1990 1.8 no vvt swap with ms3x, I see a rpm not synced in red at the bottom of tunerstudio and believe this is where my problem lies. Any ideas why that would be showing up would be great, thanks!

acedeuce802

iTrader: (1)

Post a composite log.

Carrera95

This one is all i have, not sure if it is long enough.

acedeuce802

iTrader: (1)

That's a regular data log, not a composite log.

Carrera95

Damn, well i guess ill need to throw it in again and figure out how to do a composite log :(

wackbards

iTrader: (2)

Use this tool to create a "composite log" of your crank & cam signal. You have to crank for a long time before it starts recording (20 seconds maybe?). See in the bottom right where it says "0 of 0"? You will get data once it creates about 5 sheets.

Carrera95

sweet, I'll try to get that done tmw!

Carrera95

Ok here is my composite log i took today

aidandj

iTrader: (5)

crank sensor is wrong. check the sensor to teeth gap.

wackbards

iTrader: (2)

I think OP is running a CAS. Claimed it ran ok on stock 1.6 ECU?

stefanst

iTrader: (1)

There's no crank signal. Check wiring and/or the pot settings on your MS3(X)

aidandj

iTrader: (5)

Still need a crank signal

wackbards

iTrader: (2)

Truf.

But the fact that it ran on his OE ECU (stated in previous thread) points me towards a problem with his ECU. Either a pot adjust or maybe he missed a pull-up resistor or something.

wackbards

iTrader: (2)

OP: did you clock your pot?

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ByteVenom

Still need a crank signal.

Carrera95

Yes, Prior to taking that log i readjusted r56 counterclockwise 12 times and then 7.5 turns clockwise and the others were adjusted during assembly according to the instructions on trubokitty.

wackbards

iTrader: (2)

Ok... You mentioned that the motor runs on the factory ECU. Does it throw a CEL code? IIRC, no crank signal is code 2. I don't know why it would run without a crank signal though. Also, have you tried just swapping in a different CAS sensor?

mmmjesse

how do you have it wired up for CAS to the ECU?

Carrera95

No check engine light but the car runs rich at all times according to my wideband but i doubt that its anything major. I daily the car so i don't want to risk any major downtime of switching out parts when they should be working correctly if the car is running fine. I haven't done anything to the cas wiring except i believe i had to extend the wires when i swapped in the 1.8. I also just remembered i think i used a smaller or larger gauge wire than the factory wiring, could this cause the sensor voltage to be out of wack and not have the megasquirt pick it up?

Carrera95

I'm not sure how sensitive the ms3 is.