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turbo stopped turboing 700

posted by  ChampaignTurbo on  Sun Feb 5 07:06 CST 2006
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last visit: Thu May 20 05:47 CST 2010
[RELATED]

I bought my 1990 765 2 months ago, I replaced radiator due to a cracked tranny cooler,put in new wiring harness and speedo/cruise module and all was going good. I put in new plugs, wires, rotor and cap...changed the oil. On the first trip after tune-up, while going up an overpass and passing a semi, the turbo revved, but the power didn't seem to boost. After that, it ran fine EXCEPT the turbo wouldn't kick in...the turbo gage got to straight up, but never crossed in to the white range. I didn't notice any extra exhaust...no oil left behind. I checked the hose connections...nothing undone. Does this have any tell-tale signs. What order do I start ruling out what components?

I read the thread about driving without a functioning turbo and doing/not doing damage...I'm still not sure about the verdict on that one.

THanks,
Mike








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    turbo stopped turboing 700

    posted by  aleekat on  Sun Feb 5 10:56 CST 2006
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    last visit: Fri Oct 24 13:19 CST 2014
    [RELATED]

    First check is the turbo itself. Remove intake hose and see if the shaft spins freely and doesn't have excessive play or hit the sides.
    Waste gate stuck/broken in the open position or the rod to the wastegate has fallen off.







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      turbo stopped turboing 700

      posted by  someone claiming to be Mike Sola on  Mon Feb 6 05:31 CST 2006 [RELATED]

      The wastegate actuator pin was sheared off...I put a washer on and replaced the pin...all is good in Champaign.

      Thanks,
      Mike







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