hey had a browse but really cant find anything that helps much in the issues im having.

car is a 96 te exec.
3 litre v6 with 336660 k's on it

the car is duel fuel, had a weird intermittent miss every now and again on both fuels.
im planning on taking the dizzy cap off for inspection tomorrow.

leads and plugs were done shortly after i got the car. and they have done just shy over 20 thousand k's already since march.



other issue, more prone on petrol than on lpg.
it will struggle to hold idle (INTERMITTENTLY) properly in gear (auto) and stall, starts straight away with no issues bar crap idle.
turn the a\c on and its then turns to a constant issue.
oh and im not loosing coolant either so i can rule out a leaky heatercore ontop ecu at the moment

just looking at things to inspect and clean first as its the first v6 i have had and its drawing a blank on whats causing it as im more knowledgeable in ea to ed falcons

or lastly is it worth taking it somewhere to get it put on the scan tool if it can be?

any ideas??
had a bit of a look and everything was fine so i had a go with some carby cleaner to clean the isc.
made it worse. it now rev's higher than normal. and adjusting things doesnt seem to be helping.

ran out of time to pull the distributor cap off to inspect under there this arvo.

methinks my isc is dead, and the accumulated crap was blocking it and its stuck on the mode if i had the a\c on.
so if i load it up it drops down etc.
as last thing i want is to do serious damage

I think you are probably right.

ISC problems can be identified easily if you state what speed the car idles at:
(a) When cold. 1,200 - 1,500 rpm.
(b) When hot, in neutral - 800 rpm.
(c) Hot, in gear - 600 rpm.

RPM numbers are rough, cars vary a bit.

Putting on the headlights or A/C should up the RPM a bit. Shouldn't drop, anyway.

ISC problems wouldn't account for a random misfire. I would start with a compression test, at 337,000 km a valve may not be seating.

ISC problems can be identified easily if you state what speed the car idles at:
(a) When cold. 1,200 - 1,500 rpm.
(b) When hot, in neutral - 800 rpm.
(c) Hot, in gear - 600 rpm.

RPM numbers are rough, cars vary a bit.

Putting on the headlights or A/C should up the RPM a bit. Shouldn't drop, anyway.

ISC problems wouldn't account for a random misfire. I would start with a compression test, at 337,000 km a valve may not be seating.

isc would vary between 1,500 and 2,000 rpm hot or cold and stutter and try to stall in traffic.
that was in neutral and drive.

comp test will have to wait till i next have the plenum off


well with the more load i had on it it was helping it drop a little.
and a little bit of random, it didnt care if i unplugged the maf

well for those interested..

found the gremlins.
ISC was just that. and as my isc bolts wouldn't come out, i fitted a complete replacement throttle body off a th executive. i just blanked the 2 extra vac holes that i didn't need.
idle is now functioning correctly, and any stutter\hesitation has gone

DISTRIBUTOR had a closer look under the distributor cap, didn't like what i saw. it had evidence of arcing out and crossfiring.
got lucky and found a new dizzy on a car at the wreckers too. so i got it and refitted it.
missfire is gone also

and considering i couldn't get to the bolts to get the t\b off in the car, lpg mixer was stuck on well.
i removed the plenum and replaced the back rocker cover gasket and tube seals.


goes rather well now, but i have to stick the mixer back on tomorrow.
but driving it before and after. a major difference