Thread: L67 Intercooled Oldsmobile Silhouette Minivan

Originally Posted by Scottydoggs

double check the plug wires, we all cross em up time to time. or just maybe yo cracked more then one plug installing them.

you replace them injectors? if it was pouring raw fuel out the dp, id do a oil change asap. that might have fouled the plugs too.

I checked all the injectors and replaced the two that were stuck open, changed the oil, and changed all the spark plugs. The old spark plugs were crazy fouled and had huge gaps, I'm surprised it even ran. I tried to check all the plug wires today and I'm pretty sure they are correct but I'll definitely double check them tomorrow, however the van had plenty of power and sounded fine when giving it some throttle so I'm not sure if that is the culprit. It kind of sounds like there might be a little miss at idle, but smooths out when given some gas. It did this while the engine was stock as well though, but with no CEL, and it was a little less prominent because of the stock intake I think.

I guess I'll start by checking the plugs and all the plug wiring first tomorrow. Definitely possible one is cracked. Thanks for all the help and advice Scottydoggs, it's definitely appreciated.