Motorhome stalls as we are driving (9 Viewers)

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Sep 24, 2024
1
0
Funster No
106,710
MH
RV - Forest River
Hello everyone,

Nice to meet you all! :giggle:

We have an issue with our engine unfortunately and was wondering if any one of you would be able to help us out as it's such a random issue and we are struggling to get to the bottom of it. I'll explain.

We have a Class A RV (Forest River Georgetown) Ford triton V10 6.8ltr. F53 Chassis 2006.

Last April we installed an LPG system and it works really well.

Anyway, since we had the system installed, we have started having the following issue (it’s probably a byproduct of it as another person with the same engine specs has the same issue after installing LPG).

Intermittently, the RV stalls while we are driving.

Now, there is a lot of confusion about this issue as after many times, it's hard to determine what's causing it as it happens so randomly. I have heard about LPG system might make your vehicle stall while you are slowing down approaching a roundabout.

Though, the issue happens on both system! LPG and Petrol!
It mainly happens at slow speeds(10-20mph) but also once at faster speeds (35-45mph). It seems to be happening as soon as I leave the accelerator, the rpm go down suddenly very low and then it stalls. I put in N and turn the keys on and starts straight the way with no doubts. Last 2 times it happened, it turned OFF and turned ON itself without me doing anything?! It happens when the engine is cold and also when it's hot. It usually happens 3/4 times every 200 miles or so (mainly when we are going slow and always when we leave the accelerator). If we are just idling and going a long (like on slight downhill) it doesn’t happen. Only when I am going fairly slow and pressing on the accelerator, as soon as I leave it it stalls. I tried using manual gears (3,2,1 - American style I guess) and because the rpm when I leave the accelerator stay up and don’t go down, the issue doesn’t seem to happen.

The guy that installed the LPG doesn’t know why it’s happening. We will be going to another mechanic next week.

Do you have any idea of why this is happening? Has anyone of you have ever had this issue and managed to fix it?

Thank you so much for reading and I really hope some of you skilled people might come up with some ideas so that we can present them to the mechanic and he can have a check to all these potential causes.

We really hope to get this sorted soon as it's a bit scary to drive sometimes. Luckily when it happens, the breaks still work, but the steering wheel gets really hard so we are taking curves really slowly!

THANK YOU ALL! :pray2:
 

MisterB

LIFE MEMBER
Feb 25, 2018
6,812
15,652
Essex
Funster No
52,564
MH
Adria 670 SLT
Exp
enough to know i shouldnt touch things i know nothing about ....
My daughter had a similar issue with an LPG engined car, took it up several places but no luck. Eventually I took it to a Polish garage specialising in LPG, they fixed it within an hour!! The garage was on the A13 into London. As I think there are far more LPG vehicles in eastern Europe, they perhaps are more skilled in dealing with issues??
 
Jul 4, 2018
1,363
1,756
Bristol
Funster No
54,738
MH
Weinsberg
Exp
A few years.
Back in the 90's I had converted Range Rovers, great engine shame about the 10 mpg on petrol.

To the point stalling was due to timing on LPG on twice and the gas freezing once. May give your LPG specialist something to go on?

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PeterCarole29

LIFE MEMBER
Jul 23, 2013
1,437
1,617
Colchester
Funster No
27,084
MH
Renault Master Fleetwood
Exp
20 years
I heard yrs ago fuel freezing on the manifold under the carb
Renault’s had a water Chanel through the manifold heating it up
 

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