I have a 1997 dodge ram 1500 it runs on lpg and gas and it has a weird problem lately.
when i am driving and coming to a stop it won't go under 1250 rpm for some reason so it doesn't really wanna stop i think its a vacuum problem because i drive on lpg most of the time and it is really sensitive on that kinde stuff.
But cant find any leaks.
Had this problem bout 6 monds ago and when i tried to fix it the problem was gone nothing thil a few days ago.
So if there is any one that nows how to fix this i could use a helping hand

 

I have no knowledge on lpg systems on trucks. Someone who does might chime in soon

 

Getting any codes? Cleaned the throttle body lately? Pintle on IAC may not be able to close off properly. Check that first. Aside from that, gotta be a vacuum leak somewhere. Checked the INSIDE of the plenum??

 

Are they setup like a gasser?

 

I think so..... Isn't it just a gas manifold above the throttle body, or some such??? Never had to work on one. At least, not in the last 30 years or so.

 

I never knew or saw one thought they might have been limited in numbers lol

 

Mostly fleet vehicles.

 

Ahhh that makes sense

 

Nope no codes and the throttle is cleaned i have checkt almost al of the vacuum lines but cant find any leaks but the plenum i can check thanks for the reply

 

Mine is set up derectly in the air intake en de gasoline is shut of whit a valve