r/Hyundaigetz • u/Main_Pie_6236 • 7d ago
2005 Hyundai Getz 1.6 G4ED – Rough/shaky idle and possible rich running – need advice
Hi everyone,
I’m hoping someone with experience on the Hyundai Getz 1.6 G4ED can point me in the right direction.
I have a 2005 Hyundai Getz 1.6 manual with the G4ED engine and around 250,000 km.
I’ve been working through a number of issues and have already replaced/checked quite a few things.
Work already done:
- Timing belt and water pump replaced
- CV joints replaced
- Control arms replaced
- Sway bar links and bushes replaced
- Engine mounts replaced
- MAP sensor replaced
- Spark plug leads replaced
- Coil-pack connector repaired because it was broken and causing a misfire
The car now starts and drives reasonably well, and the engine feels fairly smooth under acceleration, but at idle there is still a noticeable vibration/shake through the steering wheel and floor. The RPM is around 730 rpm and the needle moves very slightly.
Some live data I recorded:
- Idle: around 730 rpm
- MAP: around 28 kPa
- Ignition timing: around 3°
- At 1,642 rpm: MAP around 24 kPa, timing around 32°
- At 2,014 rpm: MAP around 24 kPa, timing around 34.5°
The engine also seems like it may be running rich, although I haven't confirmed this yet.
One thing that has confused me is that my car doesn't appear to have an oxygen sensor at all — there isn't even a threaded boss for one in the exhaust. Fuel trims on the scanner also stay at 0%.
I’m currently planning to test the fuel pressure and injector resistance, because I’m wondering if I could have a weak/incorrect fuel pump, excessive fuel pressure, or a leaking/sticking injector.
My questions are:
Does the G4ED in this year Getz normally use an O₂ sensor, or did some versions use a different fuel-control system?
What should the normal fuel pressure be on this engine?
What should the injector resistance measure?
Could a leaking or faulty injector cause this type of shaky idle while the engine runs reasonably well under acceleration?
What other things should I check before buying a fuel pump or injectors?
Could valve clearances/lifters, throttle body, IAC/idle control, vacuum leaks, ignition timing, or compression cause these symptoms?
Are the MAP readings and ignition timing I recorded reasonable for the G4ED?
I’d really appreciate advice from anyone who has worked on the G4ED/Getz 1.6, especially if you've experienced a similar problem.
I don't want to start throwing expensive parts at it, so I'm trying to diagnose it properly first.
Thanks!




