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GAS idle problems

General Tech Talk

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Posts: 827
Joined: Thu Apr 28, 2005 7:52 pm

GAS idle problems

Post by F'n_Rover »

i'm going nuts here,

i picked up a recently rebuilt 202 on gas with a vh comodore surrounding it. needed for parts for an engine swap in the landy bla bla bla..

engine specs.
holden 202, 12 port with vk efi manifold. straight gas, stock throttle body and como v6 mixer. landi complex converter.

i need to get this running nice and smooth as the head, lpg and intake manifold are going onto a brand new motor. i dont wont any tuning dramas whilst running in.

i can tune it so it idles very smooth and at low revs no problems, but as soon as i take it for a drive, after about 1 min it wont idle :bad-words:
retune idle mix - same thing happens? (done this many, many times)

when running under throttle the car goes well with heaps of power.

the idle mix screw is very touchy - 1/8 of a turn will be all it takes to go from smooth idle to bag of shit. (same on both converters)

i have changed the converter, this made no differance.
changed gas feed line to the mixer again no differance.

tripple checked for vac leaks ect - all ok
converter is nice and hot

the only thing i can think is the mixer is too big for a 202?
the mixer is a basic ventri type- inline just before the throttle body.

any advice appreciated.
Ex-Army - SeriesIII -186s - NP435 - Maxi rear - megasquirt coilpack ignition - AM FM radio with 2 X speakers
Posts: 3349
Joined: Tue Nov 23, 2004 10:29 am
Location: Not where you are

Re: GAS idle problems

Post by Gribble »

popeye wrote:i'm going nuts here,

i picked up a recently rebuilt 202 on gas with a vh comodore surrounding it. needed for parts for an engine swap in the landy bla bla bla..

engine specs.
holden 202, 12 port with vk efi manifold. straight gas, stock throttle body and como v6 mixer. landi complex converter.

i need to get this running nice and smooth as the head, lpg and intake manifold are going onto a brand new motor. i dont wont any tuning dramas whilst running in.

i can tune it so it idles very smooth and at low revs no problems, but as soon as i take it for a drive, after about 1 min it wont idle :bad-words:
retune idle mix - same thing happens? (done this many, many times)

when running under throttle the car goes well with heaps of power.

the idle mix screw is very touchy - 1/8 of a turn will be all it takes to go from smooth idle to bag of shit. (same on both converters)

i have changed the converter, this made no differance.
changed gas feed line to the mixer again no differance.

tripple checked for vac leaks ect - all ok
converter is nice and hot

the only thing i can think is the mixer is too big for a 202?
the mixer is a basic ventri type- inline just before the throttle body.

any advice appreciated.
First Question, what converter/mixer system are you running?
\m/
Posts: 827
Joined: Thu Apr 28, 2005 7:52 pm

Post by F'n_Rover »

converter = landi LSE97? I've tried with a no-4 and no-6 meter pin ?

mixer = landi for v6 commodore, simple ventri design


thanks

Simon
Ex-Army - SeriesIII -186s - NP435 - Maxi rear - megasquirt coilpack ignition - AM FM radio with 2 X speakers
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