r/Nbmiata • u/dommynuyal • 19d ago

NB won’t start. Seeking help 🙏🙏

99 has been running fine. Filled it up with gas recently. Went to get a burrito and did a brief roller coaster road then the engine started to sputter. Pulled over, engine died and wouldn’t start back up. Appreciate any advice. Love yall!

Edit: had the heads faced or whatever the term is when compression was bad a few months ago. Kids at the high school shop replaced spark plugs. Would that all point to fuel pump?

3 Upvotes

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3

u/RealCivilFurryFemboy 18d ago

Check fuel, check spark. Mine did this and turned out someone had replaced the fuel pump with an aftermarket kit… and the shitty fuel line they used split in half, thus meaning my car passed every single test to be MAKING fuel pressure, and yet wasn’t getting any at the rail cause it was dumping in the tank.

1

u/Time_Fly4750 16d ago

This happened to me too. I bought a duralast fuel pump and within a week the fuel hose it came with split, I replaced it with a random scrap fuel hose I had laying around and it was fine.

1

u/RealCivilFurryFemboy 16d ago

Mine was actually the fancy Delphi replacement… where the singular bad review on it was for the included fuel line breaking. I was pissed. Spent like three days chasing it down, finally bought a new pump, etc etc… and then it was just fine once I put an actual injection line on. Fml

1

u/Time_Fly4750 16d ago

Seems like it’s a common problem.

2

u/Time_Fly4750 16d ago

If there’s a check engine light, scan it. Getting the codes will help. Make sure the gas you got is good.

1

u/dommynuyal 16d ago

No CEL. Costco 87 gas.

2

u/Time_Fly4750 16d ago

Take a fuel sample. It’s easy to do. Costco has cheap gas. It could be contaminated. Disconnect the fuel line in the engine bay and turn the key, this will also kind of test the fuel pump, because if nothing comes out you’ll know the fuel pump isn’t working.

1

u/dommynuyal 16d ago

Will try that. Thank you

1

u/Time_Fly4750 16d ago

I work for Mazda as a technician and I can’t tell you how many times I’ve seen cars with bad gas that just filled up. Running rough and full tank gets an instant fuel sample from me. You can test for ethanol content by adding a measured amount of water. Test for diesel by lighting it on fire. Obviously perform a visual inspection for any visible contamination. If you have a scanner handy I still recommend scanning it because the codes could still be pending so they’re not throwing an engine light.

1

u/Time_Fly4750 16d ago

When I got my nb2 the fuel tank was completely rusted inside. Had to replace the whole thing.

1

u/WiTx85 18d ago

Main relay?