doruk

Merhaba, Geçtiğimiz aylarda 1989 model jeep cherokee xj aldım.
Araçta LPG yakıt sistemi var.
Araç LPG sistemiyle sorunsuz çalışıyor ve bu şekilde uzun mesafeler gidiyorum ancak benzinde 3-4 saniye sonra çalışmamaya başlıyor.
Gaz kelebeğinden map sensörü hortumunu söktükten sonra araç rölantide çalışıyor ancak gaza bastığımda titriyor ve çalışmamaya başlıyor.
Araçta yapılan değişiklikler MAP sensörü değişti, TPS sensörü değişti ve gaza basmadığım halde 0.82v çıkış veriyor, bujiler değişti, oksijen sensörü değişti, yakıt pompası değişti, basınç regülatörü değişti, yakıt basıncı 3.5-4 bar aralığında. Yakıt enjektörleri sökülüp temizlendi ve herhangi bir sorun tespit edilmedi (aliexpress'ten muadilleri alındı ​​ancak aynı sorun yaşanınca orijinalleri tekrar takıldı) Bu sorunla ilgili
bir konu buldum ancak konu sahibi bulduğu çözümü paylaşmamış, yardımcı olabilirseniz çok teşekkür ederim.

Saudade

According to Google translate, this is Turkish. My apologies if this didn't translate correctly.

"Not working with gasoline

Hello, I recently bought a 1989 model jeep cherokee xj. The vehicle has an LPG fuel system. The car works smoothly with the LPG system and I drive long distances in this way, but it starts to stop working after 3-4 seconds in gasoline. After removing the map sensor hose from the throttle, the car starts idling, but when I press the gas, it vibrates and stops working. The changes made to the vehicle are the MAP sensor changed, the TPS sensor changed and it outputs 0.82v even though I did not press the gas, the spark plugs changed, the oxygen sensor changed, the fuel pump changed, the pressure regulator changed, the fuel pressure is in the range of 3.5-4 bar. The fuel injectors were disassembled and cleaned and no problems were detected (equivalents were bought from aliexpress, but when the same problem occurred, the originals were reinstalled) Regarding this problem I found a topic, but the topic owner did not share the solution he found, thank you very much if you can help."

Likely belongs in Modified. Not know how the previous owner converted over to LPG (kit? homemade?) I'd start with checking the fuel pressure on the gas side. I see he has changed the parts, but measurements are needed to verify proper operation.

doruk

I apologize for the translation problem, google translate translated my messages into Turkish when translating what was written on the page. I am writing in English again to make sure the problem is still understandable.

Hello, I bought a 1989 model jeep cherokee xj in recent months.
The vehicle has LPG fuel system.
The car runs smoothly with the LPG system and I go long distances this way, but it stops working after 3-4 seconds on gasoline.
After disconnecting the map sensor hose from the throttle, the car idles, but when I press the gas, it shakes and stops working.
Changes made on the vehicle MAP sensor has been replaced, TPS sensor has been replaced and it gives 0.82v output when the gas is not pressed, spark plugs have been replaced, oxygen sensor has been replaced, fuel pump has been replaced, pressure regulator has been replaced, fuel pressure is in the range of 3.5-4 bar. fuel injectors were disassembled and cleaned and no problems were detected (equivalents were bought from aliexpress but the originals were reinstalled when the same problem occurred)
I found a topic with this problem, but the owner of the topic did not share the solution he found, thank you very much if you can help.


The lpg system was installed with almost no intervention to the engine of the vehicle. There is a breaker in the system for the injectors and there is a breaker that cuts the electricity to the fuel pump. it gives lpg to the engine through the hose at the inlet of the throttle. I don't think there is a problem with the gas system because I was suspicious like you and canceled the system completely and the problem was still the same

measurement values map sensor gives electricity in the range of 1.5-4.5v when I vacuum, Tps sensor gives electricity in the range of 0.82-4v

Saudade

I responded on your other post in English.

No need to keep 2 threads on the same issue going.