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Thread: Turbo/boost problems?

  1. 3rd December 2024, 05:47 PM #71
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    Noise is my second name! I might cut the cat out and weld a plain pipe in there. Bonus, the cat would be worth a bit as scrap.
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  2. 4th December 2024, 11:56 AM #72
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    Checked, mine does have a cat. I'm away for a couple of weeks, when I get back I'll make some noise.
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  3. 4th December 2024, 06:41 PM #73
    Graeme
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    Quote Originally Posted by V8Ian View Post
    ...it ran smoothly but struggled to rev above 3,000.
    From memory, 3000 is maximum rpm when the injectors haven't been coded correctly or haven't been coded at all. Can this be checked?
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  4. 4th December 2024, 07:59 PM #74
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    Not by me, my Nanocom seems to have died. But on the way east this morning it did seem to be improved, revving to almost 3500 rpm, but I wasn't pushing hard. Still doesn't like hills.
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  5. 4th December 2024, 08:42 PM #75
    shack
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    Quote Originally Posted by Graeme View Post
    From memory, 3000 is maximum rpm when the injectors haven't been coded correctly or haven't been coded at all. Can this be checked?
    Correct, if they haven't been coded at all you should get a pretty hard cut at 3k rpm.
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  6. 4th December 2024, 10:27 PM #76
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    Obviously that's not the problem then. I've also been running a diesel fuel system cleaner, for the last ~8 refills. That has made no difference.
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  7. 4th December 2024, 11:51 PM #77
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    SF has probably nailed it. I was going to suggest a blocked exhaust or a failed turbo next. Decat it.
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  8. 4th December 2024, 11:52 PM #78
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    Oh, and I thought all your names were 'noise'.
    ​JayTee

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  9. 5th December 2024, 09:41 PM #79
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    Quote Originally Posted by sierrafery View Post
    IMO the discussion went all over the place in this long topic and seems that two simple tests i recommended at the beginning(page 2) were missed while i think it's relevant:

    2. if no overboost a     simple check if you can afford some noise where you live would be to undo partially the exhaust downpipe from the turbo as to release some flometimes the rattle would stoow there and see how it goes that way cos a quite common issue on facelifts is clogged catalyst then the boost can't rise due to the exhaust's restricted flow
    This jogged my memory. I had an issue many years ago with intermitent power loss. I could hear a bit of a rattle in the cat. Some times the rattle would stop and I would be low on power.
    In my case it was turn off engine alowing what was causing the blockage to fall away.
    Some times it needed a good kick to dislodge it.
    Dave.

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