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Nissan CPH025V

Number of messages: 9

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justinm
New York, United States

CPH025V
CPH02-902890 (1988)
H20 engine LPG
vacuum booster power brake

need vacuum diagram for the LPG setup
the dealer could only provide gasoline

any1 have an LPG supplement for this machine?

thanks :)

-------------------------
New York, New York its a heluva town ..you know that The Bronx is up ..and im Brooklyn down

Posted 10 Mar 2009 01:53 PM

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Prentice
Ontario, Canada

Hey justinm, I have one of these units in the shop what do you need to know? Maybe i could take a picture and e-mail it to you???

Posted 10 Mar 2009 10:59 PM

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justinm
New York, United States

well im having an issue where you drop it into gear and it dies
you put a load on with the hydraulics it dies

the spark looks good
the fuel pressure is good (1.5 lbs)

i think it was converted from gasoline
it has a CA50 carb
i have the diaphragm coming in for it

the vacuum reads a lil low and its jumping a little (1 or 2" either way)
this could indicate a problem in the valve train rings or a few other things
i thought this engine has hydraulic lifters
but i dont have anything on that either for this (specs)

-------------------------
New York, New York its a heluva town ..you know that The Bronx is up ..and im Brooklyn down

Modified 10 Mar 2009 11:24 PM
by poster.

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Prentice
Ontario, Canada

I had a problem like this about 10 years ago...... had me very confused...........good spark, good fuel, and good compression. Replaced the ignition coil with and OEM Distributor Coil. Ran Awesome. Suspect the coil was breaking down under load. Let me know

Posted 11 Mar 2009 10:24 PM

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justinm
New York, United States

the coil is new
some1 else was working on it

ill double check that though

-------------------------
New York, New York its a heluva town ..you know that The Bronx is up ..and im Brooklyn down

Posted 11 Mar 2009 10:26 PM

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mrfixit
New York, United States

They do have adjustable valves, .015" hot for ex. and in.

Posted 12 Mar 2009 09:38 AM

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steponmebbbboom
Ontario, Canada

brake servo fault will give hard pedal and/or a steady drop in idle rpm with pedal depressed, if in doubt plug the line...

is the LPG system equipped with feedback? ie vacuum line running from mixer to vacuum solenoid and to atmospheric vent on vaporizer?

in case running the valves doesnt clear it up, also my first guess...

they also have a throttle kicker which bumps the throttle when vacuum drops (ie heavy load at idle) set idle between 7-800RPM and unplug vac. line on kicker and screw it down to 1250-1300RPM, reattach and verify idle drops back down...

if it bags at full throttle try opening up the power valve a bit (7/16 wrench you will see an oval-shaped pointer inline with the vapor port on the mixer, it opens a shutter)

sometimes people lean the truck out for e-test without bothering to see how the truck runs afterward...

lastly set timing to 9-10BTDC

good luck~

Modified 12 Mar 2009 10:11 AM
by poster.

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steponmebbbboom
Ontario, Canada

hey justin, how are you doing with this truck?

Posted 18 Mar 2009 11:46 AM

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justinm
New York, United States

it was the ignition module in the dist
odd 1

seeing it started every time and i could get it to run good i wouldnt have assumed the module
o well
lol

-------------------------
New York, New York its a heluva town ..you know that The Bronx is up ..and im Brooklyn down

Posted 26 Mar 2009 10:57 PM

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