How to know if your Miata has no start?
If good, strong spark observed at each cylinder, continue to Step 4. Also, while plugs are removed, visually inspect them for damage, excessive buildup, oil in the plug wells, or other obvious issues. Check to see if they are wet- if not, fuel is not reaching the cylinders. Inspect the spark plugs.
Where is the room fuse on a Miata?
Remove the access panel under the driver’s dash and locate the fuse box. Check the 10A “ROOM” fuse in the bottom left of the box. This supplies a constant 12V to terminal 1A of the ECU. If the fuse is good, check for bad wiring by checking for power at ECU 1A. Check the Main EFI 30A fuse in the underhood fuse/relay box. Check the Main EFI Relay.
Where is the circuit opening relay on a Miata?
The Circuit Opening Relay is a likely cause of failure here- it is located under the dash. Pull the access panel to locate it (photo, diagram). It will be up under the dash, toward the side of the car (above clutch pedal).
How big is the primary coil on a Miata?
Primary Coil: .78-.94 Ω Secondary Coil: 11.2-15.2 kΩ Primary Terminal to Case (insulation check): greater than 10M Ω Spark plug wires should be in good condition and securely fastened to the coil packs and spark plugs.
What to do if your Miata has no power?
Check for +12V at the L/R terminal with the FP/GND jumper in place and the key in “RUN.” If no power detected, there is an opening in the circuit to be found. If power is detected, the pump itself is most likely at fault. If the pump is good but fuel is not reaching the cylinders, check the connections to the injectors.
Remove the access panel under the driver’s dash and locate the fuse box. Check the 10A “ROOM” fuse in the bottom left of the box. This supplies a constant 12V to terminal 1A of the ECU. If the fuse is good, check for bad wiring by checking for power at ECU 1A. Check the Main EFI 30A fuse in the underhood fuse/relay box. Check the Main EFI Relay.
The Circuit Opening Relay is a likely cause of failure here- it is located under the dash. Pull the access panel to locate it (photo, diagram). It will be up under the dash, toward the side of the car (above clutch pedal).
Primary Coil: .78-.94 Ω Secondary Coil: 11.2-15.2 kΩ Primary Terminal to Case (insulation check): greater than 10M Ω Spark plug wires should be in good condition and securely fastened to the coil packs and spark plugs.
How to bypass fuel pump relay on Miata?
MIATA NO START SOLVED! FUEL PUMP RELAY BYPASS FOR FREE – YouTube If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer. An error occurred while retrieving sharing information.
How to test the relay in a Miata?
To test this relay in the car, jump terminals FP and GND- this will bypass the AFM contact points and the ground group under the brake booster- and turn the ignition key to RUN. The fuel pump will be difficult to hear, so perform this test in a quiet location, and you may want to listen in the fuel filler if you can’t hear the pump elsewhere.
How can I tell if my Miata has a failed EFI relay?
Check the Main EFI Relay. Putting the key in “RUN” and unplugging/plugging the relay to see if it clicks is a very basic test here, but a failed relay can still click a little bit (mine did) and lead you astray.
If good, strong spark observed at each cylinder, continue to Step 4. Also, while plugs are removed, visually inspect them for damage, excessive buildup, oil in the plug wells, or other obvious issues. Check to see if they are wet- if not, fuel is not reaching the cylinders. Inspect the spark plugs.
Where can I get an ignition coil for my Miata?
Fortunately, we found a coil assembly from Mazmart in Atlanta for only $125. Now the car runs fine. The point is, don’t do a compression check without either pulling the connectors from the coils or keeping a spark plug in the wire while turning over the engine.
What should the spark plug gap be on a Miata?
Spark plug gap out of spec. As spark plugs wear, the gap between the electrodes tends to get a bit wider. The standard gap on the Miata’s spark plug should be 1mm. A wider gap may result in misfiring due to the voltage not being quite high enough to cause a spark across the electrodes. Warning on Compression Checks
What should the idle RPM be on a Miata?
Factory spec for the Miata specifies standard timing as 10° before top dead center (10° BTDC) ±1° at idle speed(850 rpm). If your timing is advanced more than this, you may experience pinging under some conditions. Dirty spark plugs Metallic burr in cylinder
Where is the fuel pump located on a Miata?
It’s on the passenger side fenderwell and it’s pretty loud. you should hear it in the cockpit of the car. Then, move on to: 1. Pull the access panel in the package tray so you can get to the fuel pump assembly. 2. Disconnect the electrial plug to the fuel pump and gas gage sensor. 3. The plug will have 4 wires.
How to diagnose fuel delivery problems in a Miata?
A multimeter — you’ll need this to be able to measure resistance and DC voltage. Check the fuses with the meter. You want continuity. Check (listen) for the main relay clicking in when you turn on the switch. It’s on the passenger side fenderwell and it’s pretty loud. you should hear it in the cockpit of the car. Then, move on to: 1.