MX5Ireland

Hey

First Gen Mx5, 1994 1.8

We are painting the weld-in rollcage in the car so we have taking out the dash, disconnected the Dash from the Loom etc, we changed the TBelt also

Q: The car wont start , she turns over but wont fire up; would taking out the dash cause this?

The Fuel pump is not priming and the no spark, check all the fuses , all are fine, all engine sensor connections look good, nothing is loose

the 2 plugs on the coilpack - make sure you have pluged them into the right sockets - its easy to plug them into the worng ones - hence it will crank and not fire

Still doesn't explain the fuel pump not priming

Does the CAS Sensor go via the Tacho in the Dash, maybe this is why it is not firing

The Dash is still out

Wonder did the fuel pump relay under that dash shake loose?

Plug in the dash clocks temporarily and check

Did you make a note of what you did while disconnecting the dash?
Just follow this procedure in reverse.
I take it the car started before this?

Latest updates, spend about 8 hrs on her yesterday

The little MX has electrical problems!
You could say the MX5 has 2 engine looms , one half of the loom is attached to the Dash and the other to the firewall, to make things easier for us we disconnected the loom from the Dash and took the dash out of there so we could trace and diagnose issues a lot easier.
The only items not connected are the two footwell lights (either side of the centre console) and cigarette lighter (all three are integrated to the dash) but these will not cause the car not to start.
Issues
Early morning Scenario
· The fuel pump was priming and we had dash lights, looks light an earth was disconnected over in the passenger dash area
· no spark
· Could not find any continuity within the harness between the ignition coil loom pins and the corresponding ECU loom pins ( forget the wire colors but I can get them)
· No relay clicking
· No revs on the tacho when trying to crank her

Current Scenario
· In order to trace the wires for the ignition coil we removed the dash and harness from the dash, reconnected everything minus two footwell lights (either side of the centre console) and cigarette lighter
· Now we have no dash lights, Charge, Brake .. but it will show the symbol if we turn on the headlights, indicators
· No fuel pump working

Any advice, we are thinking a relay is gone, fuses are all fine , inside and out plus all grounds are triple checked.