adamforbes

This is my first post, and I am by no means a noobie when it comes to car mechanics. I've done numerous engine swaps, etc. Only thing I've never done before is a rotary.

But that won't put me off. I'll start with a story, because everyone likes them. My mate brought his RX8 over earlier (by tow), because it won't start.

Tried it myself and sure enough, it's dead. Cranks, but no go. Blasted some No Sweat (Easy Start, whatever you wanna call it) down the servo take off. Cranked and it breathed into life for a few seconds, then died, obviously.

Okay, so it's fuelling, no issues here. The fuel pump DOESN'T prime under ignition, or under cranking. Swapped out the relays incase it was a dud. Still no go, they don't click. Checked the fuse, nothing.

Don't have a wiring diagram so don't know what pin does what. But, guessed, and bridged the pump out. Can hear it whirring now, and guess what - it starts.

Runs for 10 seconds beautifully, then goes into Limp Home. Only revs to 5k, takes 4 calender days to get there, barely pulls up a hill, etc. Remove the key and wait 10 seconds, restart and it's fine, revs for 10 seconds then back into Limp.

Noticed the Oil Light was on - was empty. Filled it up and prayed no damage has been caused. (This wasn't me!) Read somewhere that no oil pressure means the ECU won't prime the pump. Still no go.

Disconnected the battery, can hear the TB doing an alignment, still no go. Revs then goes into Limp.

Engine management light is on, but I don't have a reader to check it out. The rear? lambda sensor cable is showing through the steath, clearly been rubbing on bumps, but since it's under the rear seats (ish), I assume it's not the front one so won't affect it, that much. Yet to go under it yet though. Wires do look intact though.

So, oil pressure is back, but the pump doesn't prime or stay running. Whats your thoughts?!

Oh, I'm Adam btw!

TeamRX8

iTrader: (25)

limp mode typically means an issue with either the oil metering pump or drive by wire throttle system

adamforbes

Okay, so does it need a TBA? Or is there a procedure that will reset the TB?

Thoughts on the priming issue?

dannobre

iTrader: (3)

You need to read the codes...my bet would be the MOP. ...but you won't know until you chec k

adamforbes

Okay, so managed to find a generic code reader and pulled these:

P1688

Pending:
P0031
P0037
P0061

The first one wouldn't clear.

0031 and 7 seem to point to the first Lambda being fecked, so I'll need to look at that. An excuse for limp home?

Also, a data log or whatever it's called, it said Fuelling Problem (probably because the pump was bridged out). I can't remember exactly.