So the story goes the car ha been in the body shop for a little work and they washed it when it were finished with absolute zero awareness of the delicate nature of our cars and jet washers….
Subsequently car won’t start, it turns over (loads of charge in the battery) fuel pump primes (loads of fuel in the tank) I have 12v at the coil but no spark. I’m not really smelling any fuel which is a surprise.
I have a fairly reliable ob2 scanner and it’s showing 0 rpm when cranking, would this indicate a faulty crank sensor? If it were faulty would that stop fuel or spark or both?
I’ve swapped coils, leads, plugs look fine and are pretty new.
No engine speed would stop spark and fuel.
All the Exige’s have the same bulkhead as an Elise. Unfortunately an Elise has a boot hinge bolted to the bulkhead just under the rear window. The Exige, not so much, but does have a couple of holes. It can allow water into the cabin behind the bulkhead trim, and all over the fuses, relays and ECU. If you pull off the trim between the seats and check the fuses for a start. If OK, check for any corrosion on the connectors at the back of the fuse and relay box. Have seen a couple now where there are broken wires going in or out to these.
Worked fine before the wash…I did peel the trim behind the seats back to see if there was any sign of water ingress, nothing obvious but will get the seats out and have a proper look…
Sounds like you a have a fault to investigate further, which is good! If there is a CPS fault, the Rev counter won’t move when cranking either.
Unlikely to be a water ingress issue, but could the garage have damaged some of the wiring? It could also be a coincidence. The CPS is wired into the ECU, so have a good look at the wiring from the sensor to the bulkhead connector.
The CPS is an inductive pick up a connected to the ECU via a twisted pair. So if you spin the wheels you would see a small amplitude square wave generated. You would see this on an oscilloscope, and should be able to see a small AC signal using a multimeter. The size of the signal depends on how close the sensor is to the pickup, but I’d guess it’s around 0.5 - 1V.
However while at home i’ve gone to fire the car up and it’s not wanted to fire, after a couple more attempts it’s then kicked into life…. Good job these cars are pretty
