Quote Originally Posted by SnowflAIKS View Post
Hi All,

I am seeking help. My fortuner 2010 has LPG installed by Xoom unfortunately they are no longer servicing. currently my unit has issue. When under heavy load the engine stalls. When it is started again it runs fine. unfortunately toyota makati rejected my car since it has LPG went to other shops and rejected as well.

- It doesn't matter if it the morning or after a long trip
- No check engine light.
- Issue happens when AC is On/Of - Not relevant.
- As I see the problem.. when the RPM goes down, it suddenly drops going below 700-800
- Idle is correct it seems 700-800
- Can simulate the issue by having the car on full stop, pressing the accelerator gently on "D" RPM drops suddenly, car shakes and then dies.
- Happens on flat road too.
- Throttle body and spark plugs inspected/cleaned 2 months ago
- engine temp at the normal range - half on the temp meter. Never saw it rise above. Have happened on occasions on very short drives (5 Mins) - when the engine is not that hot as well as on occasions when the engine would have been very hot (Eg : 6 hours of driving)

Thank you guys !
Good afternoon.

I have a 2013 Toyota Vios 2NZ-FE fitted with Zavoli Auto LPG kit, installed by Xoom in 2016.
More or less, I also experienced the issues you enumerated here.

In December 2021, I brought my car to Xoom.
Issue:
Engine starts with gasoline, then when engine is warm enough or at 1500 RPM, it switches to LPG. However, after a few minutes, it will switch back to gasoline while the low pressure/low LPG alarm beeps on despite having ample LPG in the tank.
Solution:
As I saw it, they changed the setting. While driving, when RPM falls below 1500, it switches back to gasoline. When RPM reaches 1500, it switches to LPG. This back and forth switching happens while driving. I went back to Xoom and they put it back to the previous setting (engine runs on LPG while idling) minus the automatic switching to gasoline despite having ample LPG in the tank. I also noticed that when starting the engine in gasoline, it will immediately switch to LPG. So, I just manually set the switch to start with gasoline, then when it’s warm enough, I manually set the switch to LPG.

In March 2023, I brought back my car to Xoom.
Issue:
Even if there is ample LPG in the tank, the low pressure comes ON. Engine shuts down if not manually switched to gasoline.
Solution:
Xoom replaced the LPG Solenoid Valve.

I also experience that, while idling, RPM falls 500 or below, then engine shuts down. When this happens, I manually switch to gasoline while idling. LPG is “harder” to burn than gasoline, this is more noticeable when/while idling.
What I do is clean the throttle body. Usually solves the issue but sometimes, it still falls 500 RPM. I’m thinking, it’s maybe the sparkplugs. Currently, I’m using NGK BKR–GAS (7987). I have also used NGK LaserLine LPG1. I’ve seen an ad about a sparkplug that conducts multiple sparks..maybe I will try that one soon.