Spark issue after megasquirt?
Hi Everyone,
Having a spark issue after installing Megasquirt and was suggested to post in this section.. UPDATE: Megasquirt, wideband, and everything else re-installed (suggested by other members). Car just cranks, but won't turn over. I posted the current tune in a reply down below, but i will re-post it up here when i get home tonight Long version - scroll down for "straight to the point" version lol I drive a 1991 Miata SE with 90,xxx original miles. It was running good until I tried to install an Innovative wideband (DB Series Wideband Kit - Blue Part #: 3795) and MegaSquirtPNP G2 ECU at the same time. Followed the instructions for everything the way they read, but after installing the required maps/settings after all was done, the car would turn over, but it would have trouble staying on and just die down. It would also drain my battery for some reason and i eventually had to keep using jumpers to another car every time. After trying to adjust the timing and what not in the Megasquirt program, timing belts, new fuel components, i gave up and completely removed ALL wiring and components (like O2 that came with the wideband kit, replaced oem ecu, etc..) and put everything back stock. At first i had to jump the car but eventually the battery charged up a bit. It would just crank and not fire for a while and eventually after replacing the parts below (most parts suggested by others and some searching but problems is still here obviously) the car now turns on and will idle about 900 but not steady. It feels like its a cammed rotary motor. Like the video below, if i remove spark plug wires # 1 or #3 the car still stays on and runs the same but if i take out #2 or #4 the car shuts off. Checked the spark by simply pulling the wire out slightly and realized 1 and 3 have very little to no spark and 2 and 4 have strong spark. Also after leaving it running for a bit (more that 5-10 min) the car will begin to leak coolant looks like out the cap and the middle parts of radiator. Like i said i'm not sure what it could be just need some advise. I've been researching for months. All parts listed below are NEW. SHORT VERSION My Miata is running as if only 2 cylinders are firing. If i remove spark plug wire #1 or #3 the car will continue to run the same, but if i remove #2 or #4 the car immediately dies down. like this guy Parts Replaced ECU Fuse Fuel Pump Fuel Filter Fuel Pressure Regulator Fuel Injectors Fuel Pump Relay Spark Plugs Spark Plug Wires Coil Pack Ignition Switch Coolant Temperature Sensor (back of motor) CAS (Cam Angle Sensor in back of motor) PCV Valve Throttle Dampening Valve MAF Box ANY advise or suggestions welcome! Thanks, Mike |
Just like in the other thread, show your spark plug wires. Coils are paired 1&4, 2&3. Sounds like you've got them 1&3 2&4.
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Originally Posted by gooflophaze
(Post 1305959)
Just like in the other thread, show your spark plug wires. Coils are paired 1&4, 2&3. Sounds like you've got them 1&3 2&4.
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Follow Miata Ignition - and if that doesn't work, swap the pairs, either 1&4 and 2&3 or 2&3 and 1&4 across the coil packs.
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Originally Posted by gooflophaze
(Post 1305971)
Follow Miata Ignition - and if that doesn't work, swap the pairs, either 1&4 and 2&3 or 2&3 and 1&4 across the coil packs.
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did you buy the MS new?
looks like it's not firing spark B. use the output test mode and try firing Spark A and Spark B. |
Originally Posted by Braineack
(Post 1306421)
did you buy the MS new?
looks like it's not firing spark B. use the output test mode and try firing Spark A and Spark B. MegaSquirtPNP G2 http://www.good-win-racing.com/Mazda-Performance-Part/61-0342.html Innovative A/F gauge with O2 http://www.diyautotune.com/catalog/innovate-standalone-gauge-kit-lc2-blue-db-gauge-3795-p-153.html GM Open Element IAT Sensor http://www.diyautotune.com/catalog/gm-open-element-iat-sensor-with-pigtail-p-62.html When you say try firing spark A and B do you mean within the Megasquirt program? I'd have to put the MS back in (currently on stock ecu). Sorry im new to the tuning element. |
Yes - those settings are under the CAN Bus / Test Mode menu in TunerStudio. If Spark B won't fire, contact us directly at support@diyautotune.com for warranty repair.
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26 Attachment(s)
Originally Posted by Matt Cramer
(Post 1306825)
Yes - those settings are under the CAN Bus / Test Mode menu in TunerStudio. If Spark B won't fire, contact us directly at support@diyautotune.com for warranty repair.
Opened the Tuner Studio and hit "Create new Project" https://www.miataturbo.net/attachmen...ine=1455485340 Then i turned the accessories on and hit "detect" and this popped up. https://www.miataturbo.net/attachmen...ine=1455485340 "Accept" https://www.miataturbo.net/attachmen...ine=1455485340 "Next" https://www.miataturbo.net/attachmen...ine=1455485340 "Next" https://www.miataturbo.net/attachmen...ine=1455485340 "Finish" https://www.miataturbo.net/attachmen...ine=1455485340 "File" - "Open Tune" - Selected the 91 Miata 1.6 "V3 3.1" Tune from MegaSquirtPNP by DIYAutoTune.com https://www.miataturbo.net/attachmen...ine=1455485340 Tried to load it anyway. https://www.miataturbo.net/attachmen...ine=1455485340 Error essage popped up https://www.miataturbo.net/attachmen...ine=1455485340 Error list from map V3 3.1 https://www.miataturbo.net/attachmen...ine=1455485340 When i tried the same process with the V3 2.5 map This is the error list popped up. https://www.miataturbo.net/attachmen...ine=1455485340 https://www.miataturbo.net/attachmen...ine=1455485340 Here what it looked like when i was cranking the engine (didnt change the IAT settings to the gm yet) https://www.miataturbo.net/attachmen...ine=1455485340 Sorry for the novel just trying to be detailed. |
cool, now do output test mode and test for spark a and then spark b.
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1 Attachment(s)
Originally Posted by Braineack
(Post 1307694)
cool, now do output test mode and test for spark a and then spark b.
Coil A - Spark on coils 1 and 4 Coil B - Spark on coils 2 and 3 Have the wires ordered like below (1.6) https://www.miataturbo.net/attachmen...ine=1455567501 Does it matter that when i uploaded the tune i got the error saying the signatures don't match? |
no.
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Originally Posted by Braineack
(Post 1307972)
no.
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This will sound weird but try pulling the windshield wiper fuse.
I have not figured out why but it corrected a similar situation in my car. Might not work but it's easy to try |
Originally Posted by 90 Turbo
(Post 1308026)
This will sound weird but try pulling the windshield wiper fuse.
I have not figured out why but it corrected a similar situation in my car. Might not work but it's easy to try |
Could i possibly be loading the wrong type of file or megasquirt need to be updated?
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post the msq that's running on the car currently. (i hope youre using that v3.1 basemap)
post a datalog of the car idling on that msq. |
2 Attachment(s)
Originally Posted by Braineack
(Post 1308180)
post the msq that's running on the car currently. (i hope youre using that v3.1 basemap)
post a datalog of the car idling on that msq. Here is the file currently on the Megasquirt. (yes i used the V3.1 basemap) but i can't datalog it idling just yet because it just cranks and wont turn over. |
so what changed? Your first post says running on 2 cylinders but now it says just spins over and doesnt run?
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Originally Posted by mmmjesse
(Post 1308713)
so what changed? Your first post says running on 2 cylinders but now it says just spins over and doesnt run?
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