Outer Limits 4x4 Board

I fitted a GU ZD30 box to my 95 GQ, I had to cut the bonnet reinforcement underneath in that corner, i did it very carefully with the angle grinder and a thin cutoff wheel. only needs a 4 inch square cut out, being careful not to go through both layers of steel closer to the very side of the bonnet ...

After all the basic mods i did to my TB45 auto , by far the best thing I ever did was the gas injection, i got a significant economy increase of almost an extra 100ks/ tank of gas depending on driving style and a massive power increase. I was very happy with the results, High flow sports exhaust ...

Have you installed a boost gauge? I think you will find that the GU ZD30 ECU controls the boost level, it does this with consideration of how much exhaust gasses are re circulating. When i blocked the EGR valve on my mates i saw the boost level drop off under load, i believe it substitutes boost ...

I've seen someone use smooth peanut butter before. Use a cloth and rub it in, circular motion. Natural peanut oil apparently does the trick.

The pic was taken on a dead straight, level section of road at cruise speed.
The pic tells you several things. You can see from it that I was cruising at 110kph on a flat road. That I was not coasting and therefore showing an lower EGT than normal. It shows my boost level. It shows my EGT.
We have ...

Thanks heaps Northside for going to the effort, I found your dorky graphs most informative. I can now see and understand a problem I have been having with surging around 2800rpm range. 95 GQ coilcab with BB turbo, large FMIC, 3 inch straight through exhaust, fuel turned up nearly 1/2 turn standard ...

I found when doing these exact same mods in standard form the ZD30 ECU controls the boost level by a control valve in the front of the engine bay via a vacuum hose to the turbo. Originally the ECU will substitute some boost pressure with exhaust gasses from EGR. It is important that when blocking ...

Gq 1995, TD42, originally non turbo, 500,000ks. Water cooled BB Garret turbo, 3inch strait through exhaust with pyro probe post turbo. Large FMI, fuel pump turned up 1/2 turn. Exhaust temp never goes over 500deg, And I do push it hard at times.
A mate has a ZD30 GU, all the anti grenade mods are ...

After installing 80% reduction gears in my GU Auto i replaced the oil with Dextron 3. Red stuff came out when i cracked it open. Done many hard core trips without any problems. My GQ I was told by a reparable mechanic to put gear oil and 1 Cup of Dextron. GQ runs smoother now.

I recently fitted the cheaper drop boxes to a mates GU, they required trimming a small lip off from bellow the original mount for the arm, its non structural and is necessary for the drop box flange to fit snug against the original mounting point. Its easy to see once you have them in front of you ...

Mate, just over a year ago I added a turbo kit to my TD42 GQ, had 500,000 on the clock at the time, Ive done 25,000 since. Like you I'm not sure if its true k's or not. So far I have done several long trips and many abusive week ends in the bush, all I added was a boost gauge and an EGT gauge. I ...

I had a set of the older ST, 315/16. On my lifted GU wagon. I was very happy with them, they were not very noisy on long trips compared to mates with other mud terrains, I deflated them down to about 18psi for sand and also did very steep rutted hill climbs in high country Vic, followed my friends ...

Mate, sounds like a turbo problem, I have a GT35 with a .70 on my td42. Not ideal I know, but I got it very cheap, spools nicely from 1800 rpm and is easily boosting at 13 psi at 3000rpm through a massive front mount ic, standard pump wound up 1/4 turn. Cheers.

My 4.5 when standard never got over 300 K's to a tank of LPG. Installing iridium plugs and an sports exhaust with extractors gave me extra 30-40 K's. But by far the best decision I made was throwing the old mixer system gas and installing gas injection. Heaps more power and was getting 400 K's every ...

I had a full 2.5 inch sports system with pacemaker extractors no rear resonator + high flow cat fitted to my tb45 gu, duel fuel. Made it run smoother at traffic lights, had better response, reved out more while on gas and gave slight noticeable power increase with on average 30 - 40 more K's per ...

I have also heard of the middle most cylinders getting majority of the LPG. I believe this is because the LPG falls from the intake into the manifold and continues falling to the closest ports as lpg is heavier than air. Thus the main reason gas vapor injection for efi vehicles have a massive gain ...

Unfortunately not as easy as a fan belt or pulley. Noise does not change relative to engine speed, noise does coincide with the road speed. Gets quiet down to a squeak when slowing down through a town. And makes no difference what wheels/tyres I'm using.

Hi there, I am in need of some help diegnosing a loud squealing noise coming from underneath my 95 td42 coil cab GQ. I purchased the vehicle about 8 months ago, during a return trip from Alice to Melbourne recently a loud squealing noise developed, coming from underneith the vehicle it gets louder ...

Connects directly to vacume shut off valve thingie on my fire wall then through to the fuel pump throttle actuator. 95 St coil cab. When the air con pump turns on, this increases the idle speed. I found this while trying to diagnose why my truck was idling fast. Hose had come off. I'd say just plug ...

My friends TB48 injected gas is quite loud if your outside the car. Sounds like something is wrong, he was advised this is normal. It is not noticable from inside with the windows up. They are mounted on small rubber blocks.

If it's all stock check if there are any head lamp realays in the engine bay, normaly located in a fuse box with a plastic lid. These realays can fuse shut when they get old or get muck in them, happened to me once. When you flick from hi to low beam you should be able to hear the realay clicking ...

My friend has a gu tb48 and yes it is very quick. Since he has had it put on gas we have had nothing but trouble. Engine warnins, starting problems and many sensor issues. I have heard this a lot with other tb48 owners who have mucked around with this engine. It has way to many sensors and other ...

My Tb45 has 310000 now with LPG from new, i change the oil every 10000 and adjust valve clearances when it becomes noisy, i also keep the coolant in order. I give this engine hell!! The only thing i have replaced recently is the front main crank seal, cost about 10 bucks and an hour work with the ...

My friends tb48 has bigger brakes, 15 inch rims dont fit, but my tb45 and another friends 3ltr diesel are the same (smaller).

A friend of mine had the very same problem with his gu III. His is a TI model with TB48 motor. His problem started just after his LPG conversion. We took it back to the gas fitter and demanded they fix it or else. It took some convincing but they had it at an auto elec for a few days, it cost them ...

I have Cooper 315/16 on my S1 TB45 GU with 3 inch spring lift, they fit no probs, i needed a bracket available from ARB to fit the spare on the back properly. My friend has the same with 15 inch rims and they fit just clear of the brake caliper with no problems so far. Another friend has a TB48 TI ...

My 4.5 on duel fuel has 300,000 ks and i have had very good reliability. Only replaced front engine seal, was easy. Now needs rear axle seals (not so easy) at 300,000. i have a factory fitted gas system stamped same date as vehicle manufacture. I get about 300 ks around town with standard size ...

where do you plug it in but? i didnt think the TB45 had any plugs for testing


There is a grey colour plug for diagnostic testing down low under the steering columb near to where your knees would be.. I always warm up my gu before drivig, it's an auto so it doesn't stall but does run like crap if ...

I went halvies with a mate in a diagnostic hand held device we bought off ebay, it cost about $300, he was having trouble with his tb48 (later model). I pluged it into my gu to see if it would work on the older model and it come up with the knock sensor code that i was un aware of. This devise also ...

I recently had the same problem with my tb45, it was very bad while on gas, i had a diagnostic test done and found a knock sensor error was displayed on the machine, after re setting the error code it was like i was driving a new car. I can only guess i must have been driving with this sensor not ...