This is my first post.
I own 2000 Santro converted to LPG. Few years back faced clogged fuel pump problem and replaced pump as per mechanic advice, and notice that there was nothing wrong with pump accept clogged sieve, thereafter I cleaned pump and tank myself. Car running smooth from 2008 onward. Recently I noticed when I shift gears and accelerate, car does not pickup instantly and also there was phut phut sound from silencer. So I thought there may be clogged fuel pump again, though it start it on petrol an then shift to LPG every time.
I changed fuel pump sieve, pump was working ok, but problem persist. Then I checked fuel filter, which was also ok. Then I decided to clean injectors and check fuel pressure myself (ultrasonic injector cleaning not available here, only chemical cleaning), after cleaning injectors car is running very smooth with no hiccups. If you like I can post images of my DIY job