Quote Originally Posted by scian_ph View Post
Solenoid is an electromagnetic valve used to close and open the LPG flow in the copper pipe. When the electric current is charge, the winding will create a magnetic force to left up the valve to open. And when the current is disable, the spring will push the valve to close. So, the solenoid doesn't open partially. Cold starting is normal even in the gasoline mode. But too much hard starting always happens when: there is a premature clog on the system, dirty LPG Mixer and air filter. And when the engine is hot, the clog will reach its melting point(it will become soft), causing a continues LPG flow.

In a carb type engine when changing from Gasoline to LPG vehicle should be at rest. Press the LPG Changeover Switch to neutral mode, it will close the both petrol and LPG solenoids to consume all the petrol inside the carburetor, then the engine will shut-off. Press to the LPG mode then start the engine. When you switch directly, at a moment the engine will consume both petrol and LPG, causing insufficient supply of air in the combustion chamber because it was displaced by the amount of LPG. As a result why you experiencing like drowning.

l.
Thanks for the info sir. my lpg kit is emulator type, so normally i start the engine with petrol and switch to lpg pag half ng yung temp gauge ko and while the car is in motion unlike sa carb type.

I went to speedy fix last week to have my car diagnose kasi nga i have problem at cold starts parang palyado ang makina then it will be normal after 2 minutes.

napansin lang ni Migs ( speedyfix) pag naka gas ako may konting palya yung engine compared when running on LPG even when the engine is already warmed up.

he suggested to make a full tank and run on petrol for a while, he suspects the cars petrol injector is somehow malfunctioning dahil siguro 99% of the time i use lpg.

so now im monitoring my car and for the meantime petrol muna para ma check kung mawawala yung problem ko during cold starts.

thanks to migs, very accomodating