for real.


cause mine only fires on one and four. there's fuel on two and three, but no spark (verified via timing light). all four fire on the stock ecu.

 

Is this a new ECU or a new problem on an old ECU? The first thing I would check is the coils. It'd be pretty easy to swap them and see if the problem swapped cylinders or not.

 

its a new ECU. since the car runs fine on the stock ECU, i dont think its the coils.

 

details on the ecu, did you build it? did you buy it used?

could be alot of things even software, post up your MSQ and the details on where it came from what options it has ect.

 

brain built MSII w/launch control, bought it new from Scott. MSQ attached

 

Switch the coil outputs, so the 1&4 signal fires the 2&3 coils. If it does actually do this, than it is indeed the MS, and not anything between the MS and the coil. Don't always blame the MS.

 

One of the transistors that controlled 2 injectors had the legs bridged on my MS. Yeah, it took quite some time to find this.
DSC_0054.jpg?t=1305090889

Also, what Curly said. I swear every time I have my engine out for a significant period of time I route the plug wires incorrectly and spend hours trying to figure out why its only running on 2 cylinders with soaking wet plugs.

 

I dont understand how this is going to help. I know that the coil will send a spark and fire cylinders 2 and 3 on the stock ECU, and not the MS. How could it NOT be a problem with the megasquirt?

 

Ah, I must of skipped over that part. Sorry, next time I won't contribute. So all you're doing is unplugging the stock ecu, and plugging in your adapter harness and MS?

 

pop the cover and look at the 4 holes next to the word BOOT



follow the wires on IGN1 and IGN2 and tell me where each goes.

 

i have an MS2, and board looks nothing like that. i dont see anything labeled ign

 

Take pictures of the top and bottom of your board, especially the prototype area, and post them up.

Have you tried just reflashing firmware and .msq? I've had that clear up strange issues multiple times.

 

yea i upgraded to the newest firmware, and reflashed the msq


how do i get the bottom cover off?

 

i wasnt trying to be a dick. sorry if i came off that way

 

I'm glad you posted this as I'm having the same problem.

I'm running COPS though, with a harness that worked on the old MS1. Even ran temporary dedicated wires to my triggers and no dice...

 

Take the little nuts off that are on the serial connectors, remove the bottom screws and slide the board out.

 

thanks

 

I would check that my double dong wasnt in the runners.


Sorry I am drunkish.

 

 

my double dong is in my ******* where it belongs.