Hi!
I've been home some troubles lately with my '94 NG900 (B204L, GT17 Turbo) and hope you guys can give me some advice.
1) Leak from exhaust manifold
First of all i noticed significant oil losses - there is oil between the engine block and exhaust manifold.
I checked the compression, results are:
Cylinder 1 - 11,2 Bar
Cylinder 2 - 10,8 Bar
Cylinder 3 - 9,6 Bar
Cylinder 4 - 10 Bar
The result for cylinder no.3 seems to be corresponding with solid oil leak from exhaust manifold - what are the possible causes?
2) Overboost
Since two weeks ago i have a problem with overboosting - until now the boost was running as it should, not exceeding the orange range of APC indicator.
Right now when i push throttle the boost goes far into red area, then there is sudden drop of acceleration (for about 0,5 sec) and then the turbo goes into read area again.
One thing i tried is to switch BPC from another NG900, but it didn't help at all.
Any ideas what should i try next?
3) Fuel mixture too rich (?)
While checking the compression i took a look at my spark plugs and it seems as though the fuel mixture is too rich - there is a lot of white build-up on spark plugs 1,2 and 4.
Spark 3 looks quite different from the other ones.
Any ideas what can be the cause? I checked other threads around here looking for answers about rich fuel mix and some suggested faulty MAF, but as far as i know MAF wasn't present in NG900?
Thanks in advance for any hints!
I've been home some troubles lately with my '94 NG900 (B204L, GT17 Turbo) and hope you guys can give me some advice.
1) Leak from exhaust manifold
First of all i noticed significant oil losses - there is oil between the engine block and exhaust manifold.
I checked the compression, results are:
Cylinder 1 - 11,2 Bar
Cylinder 2 - 10,8 Bar
Cylinder 3 - 9,6 Bar
Cylinder 4 - 10 Bar
The result for cylinder no.3 seems to be corresponding with solid oil leak from exhaust manifold - what are the possible causes?
2) Overboost
Since two weeks ago i have a problem with overboosting - until now the boost was running as it should, not exceeding the orange range of APC indicator.
Right now when i push throttle the boost goes far into red area, then there is sudden drop of acceleration (for about 0,5 sec) and then the turbo goes into read area again.
One thing i tried is to switch BPC from another NG900, but it didn't help at all.
Any ideas what should i try next?
3) Fuel mixture too rich (?)
While checking the compression i took a look at my spark plugs and it seems as though the fuel mixture is too rich - there is a lot of white build-up on spark plugs 1,2 and 4.
Spark 3 looks quite different from the other ones.
Any ideas what can be the cause? I checked other threads around here looking for answers about rich fuel mix and some suggested faulty MAF, but as far as i know MAF wasn't present in NG900?
Thanks in advance for any hints!
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