A place for general chat about the Jimny. Please make sure you post in the correct section on the site, this way it keeps the site tidy AND ensures you get a more relevant answer.
Suppliers/Dealers or anyone selling with a commercial view in mind CANNOT post here unless responding to a specific request of a member in a "wanted" post.
Suppliers include people "breaking for spares" on a regular basis, when purchasing spares members should ask a supplier what they contribute to the running of the forum particularly if contacted by a Private Message
Suppliers or Members who have contributed to the forum can be identifed by the
Seems I have a bit of a ghost in my engine. New spark plugs, pcv valve, coil packs, battery, oil, coolant.Charger good, vacuum good, charging system good, oil is clean, piston/valve leaks fine, only minimal smoke here and there on start ups. Struggles to maintain idle under load often dipping to near stalling from things like aircon, lights or stereo, and can sort of feel it additionally at gear 4+ on open road lagging as well.
Seems to be when I last got some one that looked into it, it magically fixed it, so my guess is on possibly old vacuum lines. I am keen to hear if anyone else has had to deal with any simillar and the G13BB
How old, what sort of condition is the exhaust/catalytic converter in? They disintegrate with age and shock cooling from water crossings and the bits block the rest of the system especially if it has a second one under the passenger compartment. It tends to be more noticeable with more revs but it depends how bad it is blocked.
Temeraire (2018 quasar grey automatic)
Pavement princess or back road menace?
Bellerophon (2024 grello van daily)
ADORJ Attention Deficit Ooooh Race Jimny!
The following user(s) said Thank You: UpsidedownOJ
But if you still suspect vacuum (wich may only explain the idle problems) a dusting of starter fluid spray around the intake would reveal a leak. If you spray the leak the vacuum would pull in the starter fluid and the idle would rise.
138K km on ODO, seemed to have live a somewhat chill life in Japan, though light dust under the carpet, like it's been on gravel; Before being shipped to NZ 2022.
Seems to have a lot of original gaskets and parts, had starter repaired, and timing belt done on schedule.
I have not been driving it agressivly yet in NZ, as I ahve been slowly bring it back to spec, along with repairing it ready for rough 4wd'ing not just gravel cruising.
Seems to run really well when I brought it, but with time things have changed. It seems to be only under extra load the engine can not manage along with it's usually running, and may need a small amount extra gas to stable at g4+... on idle it dips low, and does it also does it when the window stops winding up, at idle
Still wish we knew what got magically got fixed on the last mechanic trip.
Last edit: 23 Mar 2026 07:48 by UpsidedownOJ. Reason: spelling and extra note
I have a G13BB and for a long time I was fighting a hesitation under load, iddle was fine, the way I manage to "fix" it was with a longer vacuum line between the MAP sensor and the intake
My issue with my engine is valve stem worn out, they pass a bit of oil steam into the intake blocking the MAP sensor with oil, so the longer vacuum line did the trick but after a few months still come back and after a quick clean it would go back to normal, so I installed an oil catch can and now it just runs fine
1999 Suzuki Jimny
1990 Toyota Celica garage queen
1996 BMW e36 touring track car
2007 BMW e61 520d touring
1998 BMW Z3 Drift Car
The following user(s) said Thank You: UpsidedownOJ
We use cookies to give you the best online experience. Please let us know if you agree to all of these cookies. Accepting the Cookies also accepts the Disclaimers for the website.
logo.
