Miata dies, does not start until like 20 minutes later, no fuel/spark
#21
Fixing those things did NOT help.... Today though the car did buck/hesitate, then died while taking a turn, then picked back up. I heard a click, similar to a relay under the dash when it died. AFR's went lean while bucking too. Makes sense it'd be the fuel relay like you said. I'll be ordering a second one soon. Hopefully, the current one isn't busted.
#23
Welp, those things did not help. Currently sitting on the side of the road... From what I can hear, the fuel pump relay clicks when I turn the key to the on position. The main relay seems to be working and is clean and not warped. No clue what's going on...
Edit: it's not the CAS, I plugged the "new" one in and spun the butterfly and nothing happened.
Edit: Cracked open the main relay.
Is it crooked? I dunno. I'll try and sand the terminal thingy down.
edit 3:
Cleaned up
Edit: it's not the CAS, I plugged the "new" one in and spun the butterfly and nothing happened.
Edit: Cracked open the main relay.
Is it crooked? I dunno. I'll try and sand the terminal thingy down.
edit 3:
Cleaned up
Last edited by Spei; 01-10-2021 at 11:42 PM.
#24
I've had a main relay failure when it appeared to be making contact. You could hear it click when powered, but it just didn't power the car.
I always keep a spare CAS/Main Relay/Crank Position Sensor in the glovebox. That is great insurance against ever needing them in an emergency.
I've gone through a couple since adding my larger fuel pump, but am too lazy to rewire the fuel pump with its own relay since I have the spare in the glove box. I guess when it dies I'll rewire it.
I always keep a spare CAS/Main Relay/Crank Position Sensor in the glovebox. That is great insurance against ever needing them in an emergency.
I've gone through a couple since adding my larger fuel pump, but am too lazy to rewire the fuel pump with its own relay since I have the spare in the glove box. I guess when it dies I'll rewire it.
#25
I've had a main relay failure when it appeared to be making contact. You could hear it click when powered, but it just didn't power the car.
I always keep a spare CAS/Main Relay/Crank Position Sensor in the glovebox. That is great insurance against ever needing them in an emergency.
I've gone through a couple since adding my larger fuel pump, but am too lazy to rewire the fuel pump with its own relay since I have the spare in the glove box. I guess when it dies I'll rewire it.
I always keep a spare CAS/Main Relay/Crank Position Sensor in the glovebox. That is great insurance against ever needing them in an emergency.
I've gone through a couple since adding my larger fuel pump, but am too lazy to rewire the fuel pump with its own relay since I have the spare in the glove box. I guess when it dies I'll rewire it.
#26
I ******* figured out what it is. So tonight I was driving and I went over some bumps and the car cut out for a second. (To me at least) this screamed loose connection. I got home, pulled into the garage and the car died, wouldn't start. I started hitting **** and tugging on stuff. I hit my MS3X a couple of times and it fired right up.
Here's me doing a live test. I'll be cracking this thing open later tonight.
https://www.youtube.com/watch?v=FFGf...ature=youtu.be
Here's me doing a live test. I'll be cracking this thing open later tonight.
https://www.youtube.com/watch?v=FFGf...ature=youtu.be
#29
I ******* figured out what it is. So tonight I was driving and I went over some bumps and the car cut out for a second. (To me at least) this screamed loose connection. I got home, pulled into the garage and the car died, wouldn't start. I started hitting **** and tugging on stuff. I hit my MS3X a couple of times and it fired right up.
Here's me doing a live test. I'll be cracking this thing open later tonight.
https://www.youtube.com/watch?v=FFGf...ature=youtu.be
Here's me doing a live test. I'll be cracking this thing open later tonight.
https://www.youtube.com/watch?v=FFGf...ature=youtu.be
im guessing I need to pull the computer and take a look for bad solder joints?
#31
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Oof, this thread.
I have some experience with this as well. See: https://www.miataturbo.net/megasquir...-diypnp-68814/
All I can offer for advice is... good luck. Before you decide the ECU is the issue, make sure everything, and I mean EVERYTHING is perfect. Troubleshooting my bad solder joint issue was a nightmare, but my ECU harness wasn't hacked to pieces which made it much easier to isolate.
I have some experience with this as well. See: https://www.miataturbo.net/megasquir...-diypnp-68814/
All I can offer for advice is... good luck. Before you decide the ECU is the issue, make sure everything, and I mean EVERYTHING is perfect. Troubleshooting my bad solder joint issue was a nightmare, but my ECU harness wasn't hacked to pieces which made it much easier to isolate.
#33
It’s on the stock ECU for the moment. I pulled and inspected it and all looked great. I recently installed an AEM wideband so I removed, cleaned and tightened the ground at the back of the block. I also swapped out the CAS. I’m placing the extra coil in the trunk just in case it stalls again. I’ll swap that and see what happens.
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10-20-2018 11:15 PM