The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1990 Chevy Suburban idle/accleration problems

cableguy0 · 08-17-2010, 05:56 PM

Get a can of carburetor cleaner. And spray around the intake and throttle body while the engine is running. The engine will rev if you hit a leak. at that point try to pinpoint where its leaking and fix it. After you do that. Put the timing back at 0. Then unhook the battery and leave the truck sit for an hour or so to make the computer lose its memory. hook the battery up and restart the truck. Remember just because a component is new doesnt mean its actually working. Are you throwing any codes and what are they? Vacuum should be closer to 20 inches but we will tackle that afterward. The other thing to do would be a compression test to make sure that the engine is mechanically sound.

08-17-2010, 05:56 PM	#4
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,950	Re: 1990 Chevy Suburban idle/accleration problems Get a can of carburetor cleaner. And spray around the intake and throttle body while the engine is running. The engine will rev if you hit a leak. at that point try to pinpoint where its leaking and fix it. After you do that. Put the timing back at 0. Then unhook the battery and leave the truck sit for an hour or so to make the computer lose its memory. hook the battery up and restart the truck. Remember just because a component is new doesnt mean its actually working. Are you throwing any codes and what are they? Vacuum should be closer to 20 inches but we will tackle that afterward. The other thing to do would be a compression test to make sure that the engine is mechanically sound. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. Last edited by cableguy0; 08-17-2010 at 05:56 PM.