We just had the pleasure of doing the head gaskets, they had gone suddenly and engine was taking on water and usual symptoms. (113K miles on engine but we found someone has been there before!)
When we started the engine it smoked for a while and we idled it until it quit smoking. Once coolant was completely full we have no more loss. We flushed the oil after about a 10 minute idle. Engine is idling very smoothly and we did put in new platinum plugs.
Problem is on road test it shudders, stumbles at just above 5# boost. If you dont use any boost it runs perfectly smooth- I'm guessing something to do with SC. The car did not have this symtom before the head gasket(s) went.
When it shudders or stumbes you can see the boost guage drop. IS there something we could have hooked up backwards to cause this?
In the driveway with a warm engine you can advance throttle slowly to 4000 RPM without any stumbling or hesitation - it maintains about 20" of vacuum. It's always on road tests when the boost goes to just above 5# when the juddering, missing?, starts and the needle drops back.
There are so many vac line and plugins, it is possible we created this problem. We tried to tag everything and return it to the correct places but may have slipped or interchanged one vacuum hose. Most electrical plugs only fit one place.
Does this sound familiar to anyone?
Thanks.............
When we started the engine it smoked for a while and we idled it until it quit smoking. Once coolant was completely full we have no more loss. We flushed the oil after about a 10 minute idle. Engine is idling very smoothly and we did put in new platinum plugs.
Problem is on road test it shudders, stumbles at just above 5# boost. If you dont use any boost it runs perfectly smooth- I'm guessing something to do with SC. The car did not have this symtom before the head gasket(s) went.
When it shudders or stumbes you can see the boost guage drop. IS there something we could have hooked up backwards to cause this?
In the driveway with a warm engine you can advance throttle slowly to 4000 RPM without any stumbling or hesitation - it maintains about 20" of vacuum. It's always on road tests when the boost goes to just above 5# when the juddering, missing?, starts and the needle drops back.
There are so many vac line and plugins, it is possible we created this problem. We tried to tag everything and return it to the correct places but may have slipped or interchanged one vacuum hose. Most electrical plugs only fit one place.
Does this sound familiar to anyone?
Thanks.............