Boost Question

[Bernard Littau]

Hi Mike,

[snip]
> My question is, how can you tell if the turbo is good
> if you can't drive the car? Just sitting at idle, the
> boost gauge shows 0.1 or 0.2. If I disconnect the hose
> to the ECU it shows 0.9, so I think the gauge and ECU
> are OK. If you punch the throttle, you can see 0.6 to
> 0.7 very briefly. Does this mean that the turbo etc.
> are OK?
[snip]

Your observed behavior sounds normal, so that is good.

Pull the big hose off the front of the turbo, and rotate the turbine by
hand.  If it moves freely, then the turbo is very likely ok and working.

The usually have some play radially (up-down or left-right), but should be
tight axially (fore-aft).

Best,

Bernard Littau
Woodinville, WA
'88 5ktq