MSPNP2 - Swapped a 1.8 from a 1.6 wiring
 

Hello all,

I'm helping my friend finish his 1.8 swap into his NA. He had a tired 1.6, and bought a lower mileage 1.8 and put some of the turbo pieces on and put the motor in the car.

I wrote a 1.8 basemap to the vehicle, but am having issues with the car starting (and running like garbage) I'm hoping you guys can suffice.

From my understanding, he purchased a FM swap kit, and is running the 1.6 coils, firing order of the 1.8, on the MSPNP2 harness that was wired for the 1.6

The car has trouble starting, but when it does, runs like garbage and does not hold an idle. (I think the idle is due to the tps being unplugged. currently has a 1.6 pigtail on it, need to source a 1.8 or tap holes for FM's TB adapter)

Would any of you guys be able to give me any advice as far as the wiring/swap for the megaqsuirt? I'd like to help get it to idle, and then have him take it to a reputable tuner.

Thanks!

Edit: Would like to rename the thread and take out the "wiring" portion, but no worries. If a mod can clear it up great! If not, so be it!

See if it's running on all 4 cylinders (pull one spark plug wire at a time, if you ever pull a wire and the engine does not change at all, that cylinder isn't firing). If all 4 cylinders are firing, then it's likely the tune, and we'd need the tune file and a log to help you.

I was sure that pulling a plug on a wasted spark ignition system would kill both paired cylinder... and also risk damaging the coil since it has nowhere to discharge

Pulling a plug wire would not affect the other paired cylinder, it will still fire. I never really thought about risk of damaging the coil, I know several people who have used this method of diagnosis without issue, should wear gloves for shock protection but I have done it several times with no repercussions.

I'm not an expert by any means but if this image correctly represent the miata coil and plugs system, if you pull a plug wire the only way I see the other will discharge is arcing between the coil terminal and the head.

https://cimg7.ibsrv.net/gimg/www.mia...24a3b83e2a.jpg


If you have a more logical explaination I'm all ears.

I don't have a more logical explanation. If you're not comfortable with it, then find another way to figure out if all cylinders are firing. Then post .msq and .msl.

Attached are the msl and msq files

Update: got the vehicle to start and erradically idle, I think the engine was getting too much fuel. I changed the cc injector min to 205, and altered the fuel ve table from the previous tune to 5 less than what it was.

Waiting on TPS pig tails