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Hi fellas, I have a 1999 GU TD42T. Just stumbled across this thread. I have had rough idle and smoke at cold start. Checked my glow plugs by measuring the voltage, measuring current draw for each glow plug and found them ok. Actually removed each glow-plug and watch it glow. Cleaning the plugs did not make any difference. My plugs drew about 8 Amps each. They all measured 1.2 ohms. Total current draw was around 48Amps from memory. Eventually removed my injectors and tested them on my injector tester. Found them to be poor performers. Took them to local Diesel Shop where they received new seats and pintels. This proved to be very effective. Reduced the smoke by about 90%, rough idle now only about 7-10 secs with the odd white smoke puff. After 10 secs from cold start, engine runs smooth.
So, I still have a little rough idle and a few puffs of white smoke but much improved. I have also changed my lift pump as I found the fuel is receeding back to the tank.
This move also improved matter for me. Anyhow, that my little bit.
Roland the WOLF 22/8/2015
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