jpnMiata

Hey all,

As the title suggests I've been having trouble with my 1992 Miata that cranks but won't start, and I'm running out of ideas of what the issue is. The car cut out as I was backing out of my driveway (engine cut of as if I turned off the ignition) and refused to start back up.

Relevant Specs/Mods:
- Stock 1.6l engine
- Stock injectors
- MSLabs MS3 Megasquirt (the car ran perfectly fine on both the stock ecu and the MS)

Here's what I've done/replaced so far in an attempt to fix the problem:
- Replaced the fuel pump/fuel filter; Both I think were original but replacing the two did not fix the problem
- I managed to get the car to run by jumping F/P to GND in the Diagnostics box in the engine bay, however the car is now reluctant to start with the jumper (Maybe the engine is cold or spark plugs fouled?)
- Replaced the main relay and the fuel pump relay, problem still persists

What else am I missing? There is what looks like an alarm under the steering column, could that be the problem?

I've attached pictures of what I think is an alarm, along with my current tune if that needs to be looked at.

matrussell122

iTrader: (1)

Have you ever drove it with the megasquirt or did it just get installed

jpnMiata

Yup, I installed the Megasquirt in December and I've been driving it on MS for about a month or so

matrussell122

iTrader: (1)

Might be a dumb question but have you replaced your spark plugs? I havent had time to look at your tune ill try to get on my laptop tonight

jpnMiata

The spark plugs haven't been replaced but it wouldn't hurt to replace them anyway, I'll stop by the auto parts store after school today. The thing that is bugging me is that I got to car to run with the diagnostics box before, but now its reluctant to start. I at least know the fuel pump works, but something isn't allowing power to get to the fuel pump since I can't hear the fuel pump prime when I switch the key to ignition.

jpnMiata

Bump for advice!