Hi again everyone. My daughters TN has developed a bit of a misfire I think. Well it sounds like it's running on 3 Cyl anyway.

As it had been standing for a few months, I figured it was just fouled plugs or something simple. We have had it running for a 3 -4 days OK, then it started the misfire. Anyhow, I got 1, 3 & 4 out OK, but No 2 took near an hour to get out. I didn't want to break it in there. When I finally got it out, along with half the alloy thread, it looked like the plug had rusted and was eaten away on the bottom.

There is no loss of coolant, no trace of water in oil and no bubbles in radiator. Baffling, isn't it.

I thought that as the car was dual fuel, maybe the LPG caused moisture build up in the cyl and when left to stand it just corroded the plug.

I am sort of preparing myself for the worst and figure if I have to, I will change the entire engine. As this one is a carby version motor and auto trans, what I would like to know is what is involved and what do I need, if I get an EFI motor to fit?

I know I can get engines at a reasonable price over here, and no I cannot convince her to get another car. She really likes her first gen wagon. I tried doing a search for engine conversions, carby to efi etc, but really could not find the answer I need. So if you can let me know what is needed to do this, it would be a great help.

Cheers,

find a mobile service/ mechanic or other

that can helicoil the number two cylinder spark plug thread

helicoil is thread replacement method

all without rebuilding or swapping the motors

use compressed air to clean out the number two cylinder

etc ..with a new set of plugs the motor should run ok

to convert from carby to EFI = approx $ 2000 and 4 days or DIY
use the same motor and head
needs- front wiring loom ,fuel pump,EFI inlet and exhaust manifolds, computers
the member Deanimus has done a conversion from carb to EFI a TR 2.6

Me no likee spend that much :nuts: Car is only worth that with the LPG fitted. Not sure if there is damaged valves or not as yet, haven'y had time to do compression test. From my apprentice days, if reading was low, we used to squirt a bit of oil in low reading cylinder and I THINK, that the way it worked was if pressure increased, then it was rings, if pressure did not change, then it was valves. Also, from the same era, when we compression tested an engine my boss always said, have your foot flat on the accel pedal to the floor and crank over for at least 3 to 5 good sealed revolutions. Can anyone confirm this.
Cheers,

all the above is correct :D
take the coil lead off at the coil while cranking

Wow $2000.00 plus labour.

I gather this is buying all parts brand new from Mits?

Go grab an old TP or TN, swap it all over. If you have not done it before, fairenough 4 days, I would generally strip out the donor car and then fit out the keeper.

You would be best to trans over dash and interior harness as well as then there will be no splicing at all needed

As for comp test, pretty much spot on, make sure you also remove your coil lead and use a dummy spark plug to carry away the voltage, these newer systems can throw a heap of voltage back down the line to the ECU if there is no where for the spark to go

I converted my spare carby engine to EFI using the parts from my buggered old EFI engine. But I think it was easy for me because I the car I put it into was already EFI... if that makes sense.

OK more simply I put the Carby (which I converted to EFI) into my EFI car. Yeah that works.

It was the first time I'd done an engine conversion and took 4 days, that included swapping parts from one engine to another, replacing welch plugs, somehow getting the dizzy jammed in the motor and not being able to get it out and and running down to a wrecker to buy a new one... But yeah it wasn't quite as bad as I was expecting actually, but was very fiddly in some spots, and splitting the auto trans from the engine was a real pain in the ass...

but like Madmagna said, if you can buy a pretty cheap donor car with a good engine, use that and strip it for parts aswell. Thats kinda what I did altho my donor car was my old magna that someone had written off so nicely for me grrr...


good luck with what you choose to do anyway mate, hopefully its not a whole engine you need to replace.