We had the same problem with our 5 Series Toyota. Ordered a new Impco regulator for $50 off e-bay. It starts and runs like a champ. Thanks for the Videos.
Try again, what is a power ram on the side of a impco c250a vaporizer. I know that it is controlled by a vacuum line to the manifold. I assume that it has nothing to do with stopping flow through the regulator. That is the lockoff job. There is no stop valve within this regulator , It just flows through.
Check the lpg injector, if it has one,,,they stick,,,if no start in cold weather add heat with heat gun ,,60 sec plus,,,,if that don’t work could be faulty, remove ,plug back up, ground, turn key on,,should vibrate, and see some movement in the end of it,, if none it’s bad,,,
Fan of your videos bro keep it up 👍🏽 i got a qs, in an old nissan like from the 80s , you think this could be the problem if it runs good on a cold start but ones it warms up it shuts off? Another qs do both the mixer and regulator gotta get hot? Thanks for your time
When it shuts off you have to figure out what is missing. Two suspects would come to mind, fuel and ignition. If the level of coolant is low the vaporizer would not be able to efficiently convert the liquid propane to vapor. With ignition, sometimes the ignition coil tends to fail when it gets hot.
Is it possible to bypass the solenoid valve for testing? mines not starting unless i spray the intake - its not clicking when i apply 12v but there is current cos it sparks lightly on jumper wire.. or can u bench test the solenoids?
Yes, It would be in the liquid form until the lock off opens since it is still under the same pressure as the tank. Once it reaches the regulator primary and the pressure is reduced, it should vaporize almost instantly.
Hi. I have a hyster 30 and I have this problem, my vaporizer freeze when I'm operating the forklift. Can you please help me withis problem. The freeing goes all the way to the carburetor and after 10 - 15 minutes of use start shutting down. Please help.
I have a hysterectomy 40XL and it looks like there are 2 vaporizers in there??? the one close to the tank looks like it ices up after a few minutes, running the forklift it feels like "an empty tank" it does when the rpms come down and it won't hold idle well ..... do you think I need a new vaporizer ?
@@forkliftgeek10 coolant low, radiator cap defective and water pump shot .. there is no hat water going thought the vaporizer but when the forklift runs for more than 5 min the radiator boils .... so I git a new water pump, thermostat etc .... on order ... thanks
if you ever need to know anything about welding - hit me up or watch any of my videos .... I might not be the best at forklift repair but I like to think I am ok good at welding
Curious why you didn't check fuel pressure at the primary test port on the vaporizer with it still on the truck first? That would have pegged the gauge immediately and told you the vaporizer is the culprit right away.
+JD10 when I did the first video propane was coming out of the vaporizer when cranking which for the older impco vaporizers would already indicate that it was already faulty. But forkliftfrank indicated that this is normal for this system. The service manual for this truck had no info on what pressure is to be expected. On top of that, there were other work that was needed to be done on the engine so the fuel system was already off.
I was meaning a gauge on the vaporizer with the system fully installed when you first diagnosed the truck. There's a primary test port for testing pressure on the vaporizer, remove the plug, install gauge. As soon as you keyed unit on the pressure would have pegged gauge.
I have a Yale GLC050 2.4l It just has a vaporizer to a fuel rail with injectors, not sure what year it is. I put a brand new vaporizer with lock off value on, and it will only run if I barley crack the propane tank open. Any thoughts? Thanks. Edit -It was no start excessive fuel before I changed it just like this one.
You are describing a next generation fuel system. The fuel system in this video is a single point throttle body injection system. What you are describing is a multi point Intake rail system. This is like comparing apples to oranges.
I have a 1998 Toyota 42-4FG25. To get it to start, I have use a shot of starting fluid. Once it's started, it runs fine. I don't even know where to start diagnosing this. Is there a separate circuit that controls the propane at startup?
Yes, there's a vacuum line that goes to a diaphragm (vacuum valve?) If I removed the hose engine dies. I inadvertently fixed the starting problem. Wish I knew what I did. I had a feeling it wasn't getting enough vacuum at crank to open the vacuum valve and once the engine got running with starting fluid, there was enough vacuum to open the vacuum valve. Maybe the diaphragm or something in that vacuum valve was stiff and messing around with it was enough to free it up.
I have this Korean car, Renault Samsung SM5 which runs purely on LPG full injection. It starts and runs smoothly, but with time the engine dies out. I have changed the fuel pump but the dying out time has reduced. The stop valves are working perfectly. What might be the cause?
Hey great job I appreciate your videos greatly. I have a question for you I got a Toyota 7fgcu25. That just smells like lp out of the exhaust. The regulator doesn't respond when I turn the mixer screw it wont idle up or down any suggestions ??
Not sure it had a vacuum leak so I put a hose and it started much better but then it idled too high so I tried to adjust it from the vaporizer n it would do anything. Just worked on it yesterday a few minutes. Going to take a better look today. I was just lost when the vaporizer wouldn't make a difference in the idle
+AIMone3WP if it has an injector then it would have a map sensor. If the map is reading low vacuum then the ecm would interpret that as a request for more fuel and pulse the injector longer. Check your map sensor reading.
I know my reply year late. But on these regulators notice the “tamper proof” Torx screws. Probraly no more rebuild kits, you have to buy brand new regulator. Reason why is the EPA compliant bull shirt rules.
Hey dude, I have a Hyspter Space Saver 50. You start it and it runs but when you go forward or reverse it feels like it's being held back. In your experiance would it be a brake issue or transmission issue ?
where do you hook up the fault reader? I have a 2005 komatsu FG25-ST-14 with a hard start and no power with sputter idle. I have looked all over but can find where to hook up a code reader.
@@forkliftgeek10 Yes thanks I watched that video but I can't find the connection port. Where would it be located on the lift? It's normally under the dash on a car but I have looked all over this lift and I can't seem to find it.
@@forkliftgeek10 still can't find it. Had a no-start condition so I rebuilt the vaporizer and now it runs but no power. The ECU failure warning lamp stays lit. Any ideas? It's model FG25ST-14 serial 589426. Thanks for your time.
