DEFENDER2.NET - View topic - High speed crank sync lost fault + Injector 3 open circuit

↓ Advertise on Defender2 ↓

Home · FAQ · New Posts · My Posts · PMs · Search · Members · Map · Calendar · Profile · Donate · Register · Log In

NEW! Links to correct engine oils: click here to view
Round DEFENDER2 stickers now available! £2+P&P. click here to buy
You are currently viewing DEFENDER2.NET as a guest - Register to take part or Log In
NEW! Links to correct engine oils: click here to view

Home > Td5 > High speed crank sync lost fault + Injector 3 open circuit

Page 1 of 1

Print this entire topic ·

Chizzle

Member Since: 13 Aug 2024
Location: London
Posts: 5

High speed crank sync lost fault + Injector 3 open circuit

I HAD a problem with my throttle completely cutting out after a high acceleration. Narrowed it down to dodgy wiring from the Crank Position Sensor.

Put a new sensor in + Loom from Empire tuning.

Managed a 5 hour motorway drive (x2) no problems. About a week later, I drove for 10 minutes on the Motorway, suddenly starts to run really rough, MIL light + black smoke out the back. (was going 55mph)
Turned ignition on and off, runs and idles fine. No sign of a misfire (also no misfire code)

Did a code read and got these:
- High speed crank synchronisation Lost fault
- Injector 3 Open Circuit Detected.

Starts perfectly & runs perfectly at low speed/low temp.

Not had problems with Injectors before. Could this be a dodgy Crank Position Sensor? Or is there something worse going on?

I'm running a 2006 Def 90 TD5 @ 178,000

Cheers,
Charlie

24th Mar 2025 5:41pm

MadTom

Member Since: 10 Sep 2013
Location: Olomouc
Posts: 658

Check wires between ECU and injectors. Often pins in connector of the injector loom went bad, loosing contact. I have repaired several of these just by tightening these pins. Bad contact leads to open circuit.
This has no direct connection to crank position sensor. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo

25th Mar 2025 9:34am

Chizzle

Member Since: 13 Aug 2024
Location: London
Posts: 5

Thanks, I will take a look

25th Mar 2025 12:31pm

Page 1 of 1

All times are GMT + 1 Hour

Jump to

< Previous Topic | Next Topic >

Posting Rules

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum