Hello, new i3 owner with broken Rex

[Rusty911]

Hi fellow i3 folk. Thanks for having me!

I've not long bought a poorly i3 Rex that came up for sale local to me. Storm-Trooper on standard wheels, 66 plate / 94ah. Nice spec.

Love driving it and really appreciate the engineering that's gone into it.

I bought it with what seems a common Rex problem: misfires on 1 and 2, multiple misfires detected. Have done fuel pump relay and plugs (genuine), tested coils, new premium fuel and a compression test (fine) and that's as far as I've got to date!

Anyway will have a surf around here and if anyone has any tips I'll gratefully give things a try. Have ISTA btw.

All best,

Barry

 

[3rigel]

Hi Barry,

I'm new on here too, first thing that springs to mind if you've done the basics is timing. Any error codes from cam sensor?

Cheers, Rob

 

[werdnam]

Hi fellow i3 folk. Thanks for having me!

I've not long bought a poorly i3 Rex that came up for sale local to me. Storm-Trooper on standard wheels, 66 plate / 94ah. Nice spec.

Love driving it and really appreciate the engineering that's gone into it.

I bought it with what seems a common Rex problem: misfires on 1 and 2, multiple misfires detected. Have done fuel pump relay and plugs (genuine), tested coils, new premium fuel and a compression test (fine) and that's as far as I've got to date!

Anyway will have a surf around here and if anyone has any tips I'll gratefully give things a try. Have ISTA btw.

All best,

Barry

Barry, how did you make out with this quest? I'm in a similar situation with a fairly unpredictable REX that is showing misfires among others. I'm always curious to know how others make out with these things. Thanks!

 

[Stevick]

I had misfires and REX shutdowns on the used i3 I bought. Scanner showed crankshaft position sensor implausibility fault. Dealers want $2k or more to replace the ~$50 sensor because the REX has to be dropped to reach it. My research showed a few instances where it was replaced by shops/DIY without dropping the REX - either through contortions or lowering the REX on loosened motor mounts, or some combination of both. Then I found a great YouTube video of a DIY where a hole was drilled in the CF bulkhead behind the rear seat to reach it. I went that route with great success! No issues since.