Dj

[djamesdavino]

95' buick riviera 3.8L w/supercharger. Car runs extremely rough when cold started and won't stay running under a load,but after 15 min. she's OK. Had everything done to it, plugs,cap,rotor,wires,air filters, pcv valves, etc... Is this a common problem for this vehicle's year? I'm running out of money

[maxwedge]

Scan it and look at coolant temp sensor inputs, fuel trims, ambient sensor inputs, no quick answer for this.

[Tech II]

Check the gasket between the super charger and the lower intake.....have seen the gaskets crack, and create a vac leak.....as the engine warms, and things expand, it could possibly seal.....

Best way to check this, is start the car cold, let it stabilize a few seconds, then spray carb cleaner all around the joint between the SC and the lower intake....if the idle changes, that is your problem....

[djamesdavino]

Thanks Max, I'll give it a try and I'll let you know. My friend is at work today,but will check it out hopefully tomorrow....

[djamesdavino]

Thanks to you also techII. I will let you know the outcome as soon as the vehicle becomes available..