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1st August 2015, 06:53 PM
#1
Tb42 duel fuel carby issues
Gday i recently bought a 88 gq tb42 carby fed duel fuel lwb for a nice price. Just lately i noticed it stall on both gas and fuel . Could this be flooding or in need of a tune ? Im able to rev to about 4000rpm before it seems to sputter not sure about lpg systems and dont know where to look .
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1st August 2015 06:53 PM
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1st August 2015, 07:38 PM
#2
Nasty Dog - Moderator
Hey mate, slip over here http://www.nissanpatrol.com.au/forum...-Introductions and post up an introduction, it is something we like all new members to do before asking for assistance so we can welcome you, that way everyone gets a nice warm fuzzy feeling
If any members require assistance in anything regarding this forum, just let me know via a PM and I will help you in any way that I can.
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2nd August 2015, 04:22 PM
#3
Dribble Master
I know nothing of dual systems apart from they seem to be a pain in the arse....... there's a few threads on here that might help you out, or gove you some ideas
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2nd August 2015, 04:36 PM
#4
Patrol Freak
check that its not duel fuelling. test lamp at solenoid if it lights up while ur on petrol you got a electrical problem
next thing to check is air leaks on the manifold to the mixer. spark timing and advance vac/mechanical not sure which or both
if its worth doin its worth over doin
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2nd August 2015, 06:36 PM
#5
Legendary
Read previous threads by me. I had these issues for years and fair bit of it is documented and fixed with the help of forum gurus here.
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2nd August 2015, 07:18 PM
#6
Patrol Freak
well mate, what sort of Gas system is it?
is it a Vapour ring
63mm-LPG-CNG-gas-Mixer-for-autogas-conversion-tradtional-system-in-gasoline-EFI-or-carburetor-Ca.jpg
Sprint type
Sprint Gas.jpg
or the old Plate type that fits under the carby?????
your mixer
is it an Impco type,
Impco.JPG
OMVL
OMVL.JPG
or a Vialle
Vialle.JPG
none of those pic's will be what you have, just using them to illustrate the variety of types available
my first piece of advice would be
get yourself a crimping machine, a whole load of new plugs and go around the WHOLE lot, and replace all of the crimped joiners and plugs - over time they stretch and get dirt and such into the joins and dont work 100%
2nd pice of advice
get it in for a Gas service
(I used to empty my petrol tank, and take it in for a service - if they charge you for petrol or ring and tell you you have no petrol, that means they know diddly squat about the Gas and will not do it properly)
tell them thanks, but you suck, so I will take it elsewhere
if you take it to get the Gas tuned - as you will use that more often - AND they do it properly - you are on a winner
if they know what they are doing
- you will get the correct type of plugs
- you should get the correct leads you need
- they should tune it to how you want it
- economy - can get 600Kms out of an 80L tank, but you will never get over 60km/p/h driving
- power - get maybe 250 - 350 out of a 80L tank, but with speed you will also get close to 140km/p/h - if it was legal................
then let us know how you get on..............
Last edited by Bigcol; 2nd August 2015 at 10:10 PM.
Tidy Whitey - 99 GU TD42Ti - Diesel Gas, (GUIV Turbo & Intercooler 8Lb boost), 33" Micky T's Baja MTZ's, Dual Batt's, Cargo Barrier, rear draws, HID Super Oscars, winch, Grinch & witch attached and more goodies to come
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2nd August 2015, 07:19 PM
#7
Patrol Freak
you also dont say if you have electronic ignition
or
if you have extended the rotor button on yours
Tidy Whitey - 99 GU TD42Ti - Diesel Gas, (GUIV Turbo & Intercooler 8Lb boost), 33" Micky T's Baja MTZ's, Dual Batt's, Cargo Barrier, rear draws, HID Super Oscars, winch, Grinch & witch attached and more goodies to come
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2nd August 2015, 09:06 PM
#8
Im not sure about the ignition system and gas ill have a further look ill have a look 2morro i do have an impco mixer type for the gas
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2nd August 2015, 10:10 PM
#9
Patrol Freak
just asking as, with the electronic ignition, it gives a better spark when required - good gear
I ask about what type of system,
as the Gas mixer is sometimes a real pain in the ar$e if its playing up
the best I have found (as in most trouble free - ) is the Sprint type
the Vapour ring ones are a real pain to sort depending on the air filter on top
the plate ones that go under the carby - same as the Vapour ring, but underneath - are same - a pain to sort
I've had 2 Patrols with Petrol/Gas
MK with L28 and Vapour ring
GQ with TB42 and Sprint type
like I said, first port of call is to go around and replace / repair all of the little plugs on ALL the relays and such for the Gas system
1 step at a time
Tidy Whitey - 99 GU TD42Ti - Diesel Gas, (GUIV Turbo & Intercooler 8Lb boost), 33" Micky T's Baja MTZ's, Dual Batt's, Cargo Barrier, rear draws, HID Super Oscars, winch, Grinch & witch attached and more goodies to come
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2nd August 2015, 10:14 PM
#10
Patrol Freak
Originally Posted by
bohall
Im not sure about the ignition system and gas ill have a further look ill have a look 2morro i do have an impco mixer type for the gas
what I would suggest, is get the numbers off the Impco Converter and start fact finding on Google
can you get a kit to re-build it - or is it a throw away type and get a new one
is it the right one for my 4.2L 6 cylinder -( have heard of a few that were for the wrong size engine)
it may just be old and dirty and need a cleanup
Tidy Whitey - 99 GU TD42Ti - Diesel Gas, (GUIV Turbo & Intercooler 8Lb boost), 33" Micky T's Baja MTZ's, Dual Batt's, Cargo Barrier, rear draws, HID Super Oscars, winch, Grinch & witch attached and more goodies to come
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