Auto-LPG Conversion Thread

[ghosthunter]

Ironically, venturi-type LPG kits are not affected by oily LPG due to its crude design.

[vinj]

Ironically, venturi-type LPG kits are not affected by oily LPG due to its crude design.

Just like old-school smoker diesels can survive with really low-quality diesel.

I went to Greenfuel today to have my kit checked as the warranty is just about to lapse (one year). All seems a-okay.

[n5110]

try to use 1 step colder plugs, ito ang kinabit ko last march and until now gamit ko pa rin, 1 time lang ako naglinis ng plugs ko. very good ang experience ko sa lpg ngayon after greenfuel replaced the broken vaporizer. mag eexpire na rin ang warranty ko next month kaya papa check ko din system ko.

pataas na naman ang gas ha.. lapit nako matg ROI

[paolorenzo]

Question lang to our resident conversion shops... Has anyone tried converting a big body corolla (1.6 GLi A/T) to LPG only? So LPG tank will be placed where the gas tank is usually located? I know it is recommended to retain your gas system, but I'm toying with the idea of having a purely city car. As it is, mga 98% of my use is LPG na. I'm thinking of getting a big body corolla as a daily drive, na LPG only. Venturi kit yata ang big body.

Appreciate your input. You can also PM me your quotation for the LPG only conversion.

[number001]

^I think you still need a gas tank (even just a small one). AFAIK vehicles equipped with LPG, still need to start up using gasoline and until the engine warms up a bit. Only then can the fuel system be shifted to LPG (from gas).

[n5110]

Question lang to our resident conversion shops... Has anyone tried converting a big body corolla (1.6 GLi A/T) to LPG only? So LPG tank will be placed where the gas tank is usually located? I know it is recommended to retain your gas system, but I'm toying with the idea of having a purely city car. As it is, mga 98% of my use is LPG na. I'm thinking of getting a big body corolla as a daily drive, na LPG only. Venturi kit yata ang big body.

Appreciate your input. You can also PM me your quotation for the LPG only conversion.

magandang idea yan, pero to remove the petrol gas tank and replaced it with a lpg donut tank might need further modifications kasi iba naman ang shape ng gas tank. parang mahirap mag rely purely on lpg kasi minsan aabutan ka ng trafic ( like recently INC) naubos ang lpg ko buti may 1/4 petrol pa ako.

^I think you still need a gas tank (even just a small one). AFAIK vehicles equipped with LPG, still need to start up using gasoline and until the engine warms up a bit. Only then can the fuel system be shifted to LPG (from gas).

not sure how the (TAI taxis) do it but according to them they totally remove the gas line. hinde ko alam kung pano nila napapa andar ang kotse from a cold start.

[ghosthunter]

^I think you still need a gas tank (even just a small one). AFAIK vehicles equipped with LPG, still need to start up using gasoline and until the engine warms up a bit. Only then can the fuel system be shifted to LPG (from gas).

not sure how the (TAI taxis) do it but according to them they totally remove the gas line. hinde ko alam kung pano nila napapa andar ang kotse from a cold start.

I do it everyday (cold start on LPG). I use the venturi type LPG kits. It just takes a few more seconds to crank the engine before it starts, otherwise it starts normally.

Only SGI-LPG kits need to start with gasoline but even then, I also have managed to start our car on LPG back when the gasoline fuel pump wasn't functioning. You just have to crank once and then wait for the LED light to tell you the LPG system was on "lpg".

[webmiester]

Only SGI-LPG kits need to start with gasoline but even then, I also have managed to start our car on LPG back when the gasoline fuel pump wasn't functioning. You just have to crank once and then wait for the LED light to tell you the LPG system was on "lpg".

Nah, SGI systems can always start on LPG too, and they can run on LPG even when the engine is cold. It's just that starting on gasoline and running on gasoline is "more efficient" and gives more power than LPG while the engine is cold, and gas may give some added engine protection during start-up (due to the additives of gasoline). The only drawback is that the SGI system will AUTOmatically switch to gasoline mode every few minutes, kaya if you dont have gas, mamamatay ka when the system does that.

[ghosthunter]

Nah, SGI systems can always start on LPG too, and they can run on LPG even when the engine is cold. It's just that starting on gasoline and running on gasoline is "more efficient" and gives more power than LPG while the engine is cold, and gas may give some added engine protection during start-up (due to the additives of gasoline). The only drawback is that the SGI system will AUTOmatically switch to gasoline mode every few minutes, kaya if you dont have gas, mamamatay ka when the system does that.

The switching to gasoline every few minutes can be programed out.

[paolorenzo]

Thanks sa input guys. GH, I was thinking of the torpedo tank (biggest variant), kasi nga LPG only, so I'd need the biggest one possible. I've seen many taxis with the gas line disabled, so I know puwede cold start on LPG. Kung pure LPG, wala pang compromise sa air-fuel mixture. Tuned to optimal LPG settings pa.

About running out of LPG during traffic, those who are still using gas only (unconverted) also face the same problem naman eh. Ingat na lang. Kung matindi ang traffic, patay makina na lang. I remember my officemate travelled from Makati to Laguna for 12 hours. Mga 8 hours sila sa Sta Rosa highway to Tagaytay. This was last INC day.

I'm hoping to hear from our installers, if they can do the custom job of mounting the LPG tank where the gas tank is supposed to be located. I'll PM bigMIKE na lang rin.

[ghosthunter]

Thanks sa input guys. GH, I was thinking of the torpedo tank (biggest variant), kasi nga LPG only, so I'd need the biggest one possible. I've seen many taxis with the gas line disabled, so I know puwede cold start on LPG. Kung pure LPG, wala pang compromise sa air-fuel mixture. Tuned to optimal LPG settings pa.

You can optimize the engine to run on LPG. You'll get better power and acceleration since you aren't compromised having to run on two different fuels.

As for positioning the tank under the car, I don't think you have enough clearance under a standard sedan for cylinder tanks. Best is the donut type tank but even then, the bigger donut tanks might be too tall to fit under the car.

I'm hoping to hear from our installers, if they can do the custom job of mounting the LPG tank where the gas tank is supposed to be located. I'll PM bigMIKE na lang rin.

bigMIKE is busy with other stuff so he might not be checking this thread as often as before. Best to give him a call. (check the contact info list if you dont have their landline number.)

[Mile2]

Any local installers who have torpedo tanks?

Medyo mahirap yata sa torpedo ay yung fuel level sending unit or the torpedo tank would have ribs or chambers isolating the floater so that when the fuel is sloshed it will still be consistent, sa toroidal medyo may sabit, mabilis magchange sa 3/4 down to 1/4, wala kasing isolated chamber para floater.

Yung gasoline tank ng Innova nung nagpalit ako napansin ko may sariling chamber yung floater kaya very consistent yung fuel level kahit tumatakbo, sana ganun din sa LPG tanks.

[bigMIKE]

Paolo Renzo
I read your inquiry I think your suggestion is possible the only problem might me the placement of the torpedo tank where the gasoline tank is originally located.
There might be constraints on the tank shape.
We have done big body corollas that are purely run on lpg as most owners would like their gasoline line condemned.
If you have any questions kindly call me 5359080

[bigMIKE]

The first time it happened, I immediately brought the car to Greenfuel. They did the bleeding, and told me just what you said about choosing filling stations. Since then, I've never gone to any station other than Total in Alabang or the one in Makati.
I thought the problem was solved until I did another long drive and the same thing happened, as I described in my first post.
Don't get me wrong... my LPG kit is also a year old now, and I never regretted getting it. Except for this problem which came about only over the last few months, the kit is practically trouble-free during my normal daily drives.

sorry for the inconvenience caused. If you have time please bring your vehicle to our shop so we can check or still we can have our mechanic see you to check on your vehicle. Please give us a call at 5359080

[paolorenzo]

Paolo Renzo
I read your inquiry I think your suggestion is possible the only problem might me the placement of the torpedo tank where the gasoline tank is originally located.
There might be constraints on the tank shape.
We have done big body corollas that are purely run on lpg as most owners would like their gasoline line condemned.
If you have any questions kindly call me 5359080

Thanks bigMIKE. Maybe GH is right. Will the largest donut type tank fit? I'll give you a call soon.

[daneklog]

I posted months ago of having my lpg kits removed but yet due to economics, i continue using it until BAD things happened last saturday (my vehicle is not yet working at the moment, diagnosis and works are still on the way). My lpg conversion is a year old already.

The vehicle gasoline fuel system is not working until it completely stalled. During the time that the gas fuel system is not functioning, i run the vehicle using purely lpg. But when the complete stall happened, even the lpg kit is not functioning.

From the diagnosis and check ups by a reputable Mitsubishi authorized shop electrician/mechanic, the malfunctioned gasoline fuel system was brought by an overheated fuel pump which almost burned the entire vehicle (Mitsubishi Adventure gasoline). The entire fuel asssembly was burned which prompted me to replaced it with an OEM materials. The worsiest thing discovered is that the computer box was also damaged because of the electrical damaged at the fuel pump assembly.

Buti na lang, the worst thing did not happen to me and my family. God Blessings.

What prompted the gas fuel pump to overheat? Maybe sir Mike and other lpg conversion gurus can help me.

Is the fuel pump remains at "ON" mode even when we are running on LPG? According to the LPG mechanic who visited the vehicle when it stalled, he mentioned that they are presently installing relays so that the fuel pump will only function when in gas mode.

I hate to think that these worst things happens because of my conversion. I ended up losing a lot than saving a little. At present, im looking for a computer box for which we know will cost a lot.

[ghosthunter]

What prompted the gas fuel pump to overheat? Maybe sir Mike and other lpg conversion gurus can help me.

Is the fuel pump remains at "ON" mode even when we are running on LPG? According to the LPG mechanic who visited the vehicle when it stalled, he mentioned that they are presently installing relays so that the fuel pump will only function when in gas mode.

In general the fuel pump still runs even when the LPG kit is running. But there are options to disable the fuel pump when the LPG is running by adding a relay.

My NAIADSS kit disables the gasoline fuel pump whenever I choose LPG. I guess since it's based on the venturi kit used on the carb LPG kits, the fuel pump relay was part of the system.

[eikichi]

I'm also experiencing problems with my car. I've had days when hard starting occurred repeatedly. Last night, I filled up my car with LPG and this morning, I did have this hard starting issue again. I tried starting the car and pressed on the gas pedal slightly and when the engine ran, it sounded like a drowning engine. Similar to the sound when a carb engine is flooded with gas but mine is fuel injected. Switched to LPG and got the same result. Was advised to let the engine run for a couple of minutes while stepping on the accelerator pedal to burn the excess gas.

I asked my cousin who is also a mechanic on the probable cause. He mentioned that the solenoid may not be shutting down properly while I am using gas. Is there a way to check this on my own? I use LPG on my car 99% of the time. I only use gas for starting and before turning off the engine.

[aejhayl17]

hindi ba 100% running on LPG ang mga LPG converted vehicles? i thought converted vehicles don't rely on gasoline anymore cause it is being fueled by LPG already.

ask ko lang po: LPG's main purpose is to lessen the cost of a vehicle's fuel consumption since it is way cheaper than gasoline, how about the performance of a converted vehicle? lakas pa din ba makina sa arangakada at asa rekta? abot pa ba ng average high speed ng auto mo before ma convert ito? how about kung loaded ka, puno sasakyan, lakas pa din ba hatak?

mga haka-haka kase sa LPG conversion is humihina daw makina kase LPG is in stable/constant pressure while gasoline is pressurized by the fuel pump in an increasing manner while stepping on the gas pedal.(mga naririnig ko lang po)

[ghosthunter]

hindi ba 100% running on LPG ang mga LPG converted vehicles? i thought converted vehicles don't rely on gasoline anymore cause it is being fueled by LPG already.

It's 100% LPG as long as you don't count starting the engine. It's still easier to start the engine with gasoline although it is possible to start with LPG.

But since Auto-LPG fuel stations aren't available outside metro manila, most cars still have their gasoline system in case on long trips outside the city.

ask ko lang po: LPG's main purpose is to lessen the cost of a vehicle's fuel consumption since it is way cheaper than gasoline, how about the performance of a converted vehicle? lakas pa din ba makina sa arangakada at asa rekta? abot pa ba ng average high speed ng auto mo before ma convert ito? how about kung loaded ka, puno sasakyan, lakas pa din ba hatak?

Generally performance will be the same for those using SGI-LPG kits. Those with Venturi type LPG kits, there will be a slight performance loss at the top end but top speed isn't that affected since I still get 165kph for either gasoline or LPG as fuel. My car still climbs like a goat on steep parking ramps like those found at Shangrila Mall.

mga haka-haka kase sa LPG conversion is humihina daw makina kase LPG is in stable/constant pressure while gasoline is pressurized by the fuel pump in an increasing manner while stepping on the gas pedal.(mga naririnig ko lang po)

Those complaining about LPG giving much less power are the same people trying to adjust their Auto-LPG system to give better fuel mileage by leaning out the air-fuel mixture.

BTW, for those using venturi type kits, keeping the air filter clean is a must. A dirty filter results in poor performance. This might be done as often as every 2000-2500 km depending on how dirty the air is in your area. Fortunately you don't need to replace the filter, just using compressed air would be enough.