There is a pretty big seat of the pants difference in acceleration
between 9 and 11.5psi. I would measure the boost after the overboost
protection valve and verify that the ALDA is seeing 11.5. Adjusting the
WG spring on the T3 is a huge PITA, so much so I'd just as soon get one
of the manual
Rolf and Others,
Thanks for the responses, i will continue to work on this at my normal
snails pace.
Mike
On Aug 4, 2009, at 7:55 AM, Rolf Martin-Hoster wrote:
There is a pretty big seat of the pants difference in acceleration
between 9 and 11.5psi. I would measure the boost after the
Usually the wastegate will fail open and allow no boost pressure. Also
check the overboost valve (bypass it if you wish). This is a common
problem in low boost diagnosis.
Luther KB5QHUAlma, Ark
'87 300SDL (281,xxx mi)
'85 Ford F250 6.9 diesel (x59,xxx mi) BioBeast
'82 300CD (183 kmi)
Benz Hogs wrote:
Usually the wastegate will fail open and allow no boost pressure. Also
check the overboost valve (bypass it if you wish). This is a common
problem in low boost diagnosis.
I can well imagine a wastegate spring weakening enough in 25 years to turn 11.x
psi into 9.0 psi. I
Can some tell me how to adjust the turbo pressure on a 84 300D? I am
currently maxing out at 9 pounds of pressure at full throttle and I
understand it should be at about 11.5. The ALDA is adjusted all the
way counter clockwise. I am trying to squeeze a little more out of
this engine
Check the condition of the fuel lines at the lift pump (on the side
of the injection pump). A dead hose on the suction side will allow
air into the fuel (possibly AFTER the in-line filter) and hence air
and foam in the injection pump. That will result in hard starts, low
boost, low
Check the boost signal hose coming off the back of the manifold, and the
hole where it screws into the manifold. If that craps up, or the hose
is kaput, improper boost signal, low performance.
--R
Michael Esh wrote:
Can some tell me how to adjust the turbo pressure on a 84 300D? I am
Can some tell me how to adjust the turbo pressure on a 84 300D? I am
currently maxing out at 9 pounds of pressure at full throttle and I
understand it should be at about 11.5.
Tells you nothing, by itself. The boost pressure is the
result of a positive feedback system, if there is _anything_
