Maxima A32 stall on LPG while driving
07-27-2013, 05:28 AM
#1
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Location: Melbourne, VIC
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Maxima A32 stall on LPG while driving
Hi guys!
Urgent help if someone has experience with LPG.
I have changed spark plugs and coils on my maxima 1996 and it's not stuttering any more, but one problem still appears.
When I am on LPG and slowing down or "gliding?" down the hill, occasionally car stalls. Before it does that, revs are jumping from 300-1000 (when slowing down) and in some point, valve cuts of and car turns of in driving (not a pleasant feeling at all). Also, when I am starting up a car, if i don't depress pedal a little bit, car will stall also as soon as gas valve opens.
As everything else when running on lpg is almost perfect, i reckon that it needs just a little tuning by adjusting one of 3 screws (shown on pictures). What I have find out is that on inlet line is "power" valve, and on converter one is for mixture and other is for sensitivity (didn't figure out which one is for what (1. is smaller and without spring, 2. is bigger and with spring).
Thanks
Urgent help if someone has experience with LPG.
I have changed spark plugs and coils on my maxima 1996 and it's not stuttering any more, but one problem still appears.
When I am on LPG and slowing down or "gliding?" down the hill, occasionally car stalls. Before it does that, revs are jumping from 300-1000 (when slowing down) and in some point, valve cuts of and car turns of in driving (not a pleasant feeling at all). Also, when I am starting up a car, if i don't depress pedal a little bit, car will stall also as soon as gas valve opens.
As everything else when running on lpg is almost perfect, i reckon that it needs just a little tuning by adjusting one of 3 screws (shown on pictures). What I have find out is that on inlet line is "power" valve, and on converter one is for mixture and other is for sensitivity (didn't figure out which one is for what (1. is smaller and without spring, 2. is bigger and with spring).
Thanks
07-28-2013, 12:43 AM
#3
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Join Date: Jul 2013
Location: Melbourne, VIC
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He he, or like in Australia! 
No worries. I've found on other lpg forums that most likely it would be the air flow speed when car is driving above 50 or 60 km/h and when you remove foot from pedal or put it in neutral that creates difference in air pressure and that mess up gas mixture . One solution is to turn the inlet manifold in opposite direction of driving (backward).
My question is: what would happened if i just remove that plastic inlet pipe that goes to air filter box? would i loose power on higher revs or on higher speed?
P.S. it has two air inlet ends, one pointing forward and one down to the ground, at 90 degrees.
Cheers
No worries. I've found on other lpg forums that most likely it would be the air flow speed when car is driving above 50 or 60 km/h and when you remove foot from pedal or put it in neutral that creates difference in air pressure and that mess up gas mixture . One solution is to turn the inlet manifold in opposite direction of driving (backward).
My question is: what would happened if i just remove that plastic inlet pipe that goes to air filter box? would i loose power on higher revs or on higher speed?
P.S. it has two air inlet ends, one pointing forward and one down to the ground, at 90 degrees.
Cheers
07-28-2013, 09:21 AM
#5
He he, or like in Australia!
No worries. I've found on other lpg forums that most likely it would be the air flow speed when car is driving above 50 or 60 km/h and when you remove foot from pedal or put it in neutral that creates difference in air pressure and that mess up gas mixture . One solution is to turn the inlet manifold in opposite direction of driving (backward).
My question is: what would happened if i just remove that plastic inlet pipe that goes to air filter box? would i loose power on higher revs or on higher speed?
P.S. it has two air inlet ends, one pointing forward and one down to the ground, at 90 degrees.
Cheers
No worries. I've found on other lpg forums that most likely it would be the air flow speed when car is driving above 50 or 60 km/h and when you remove foot from pedal or put it in neutral that creates difference in air pressure and that mess up gas mixture . One solution is to turn the inlet manifold in opposite direction of driving (backward).
My question is: what would happened if i just remove that plastic inlet pipe that goes to air filter box? would i loose power on higher revs or on higher speed?
P.S. it has two air inlet ends, one pointing forward and one down to the ground, at 90 degrees.
Cheers
His is just a little different because he had an LPG conversion/injection installed.
08-03-2013, 03:53 AM
#8
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Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 12
Hi guys.
I need a simple advice or an idea. After testing and tuning my car on lpg, seems that ram air effect was responsible for stalling while slowing down or braking. Find out that after removing a snorkel.
Now, it has very significant lack of power and response (warm air i reckon).
I would like to return snorkel back but i have an idea to reduce that ram effect somehow.
My idea is to put something in front of the inlet hole (few cm) so that air doesn't go directly into a snorkel (sticky dense foam or dense wire or plastic mesh).
They solve that usually by installing a balance pipe between snorkl i think and vapourizer, but i that's my backup plan (more work and more money).
Any ideas or advice?
Cheers
I need a simple advice or an idea. After testing and tuning my car on lpg, seems that ram air effect was responsible for stalling while slowing down or braking. Find out that after removing a snorkel.
Now, it has very significant lack of power and response (warm air i reckon).
I would like to return snorkel back but i have an idea to reduce that ram effect somehow.
My idea is to put something in front of the inlet hole (few cm) so that air doesn't go directly into a snorkel (sticky dense foam or dense wire or plastic mesh).
They solve that usually by installing a balance pipe between snorkl i think and vapourizer, but i that's my backup plan (more work and more money).
Any ideas or advice?
Cheers
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