lookin4dsm
15+ Year Contributor
- 179
- 11
- May 30, 2005
-
Oswego,
Illinois
I've had this problem ever since I rebuilt the engine.
I am running rich (black soot on spark plugs and exhaust), slight miss and low vacuum at idle. When I ground timing in DSM Link and check with timing light, I get 5 degrees BTDC.
I've fixed several boost leaks. I still, however, slowly lose pressure and hear hissing from inside the valve cover. From what I've researched, this is normal when doing a boost leak with a cold motor (compression is 180 across the board, new valve seals were installed when head was rebuilt, new OEM pcv valve checks out okay).
Everything I've read about the problem points to timing being off. Before I continue diagnosing this, I want to be able to eliminate a timing problem. Is it possible to still be off a tooth on one of the cams and the timing light show 5 degrees BTDC?
Thanks
Mike
I am running rich (black soot on spark plugs and exhaust), slight miss and low vacuum at idle. When I ground timing in DSM Link and check with timing light, I get 5 degrees BTDC.
I've fixed several boost leaks. I still, however, slowly lose pressure and hear hissing from inside the valve cover. From what I've researched, this is normal when doing a boost leak with a cold motor (compression is 180 across the board, new valve seals were installed when head was rebuilt, new OEM pcv valve checks out okay).
Everything I've read about the problem points to timing being off. Before I continue diagnosing this, I want to be able to eliminate a timing problem. Is it possible to still be off a tooth on one of the cams and the timing light show 5 degrees BTDC?
Thanks
Mike
