I purchased a 2001 8. C/K 1500 2500 Silverado 350 / 5. . I have a 2001 Chevy Suburban 2500, 2WD w/ 6. . I have done a tune up including oil and filter, fuel filter, spark plugs, wires, cap and rotor. . Silverado 1500; Silverado 1500 Hybrid;. A fouled spark plug can cause a rough idle. Step 2: Locate the port for the OBDII reader. When you first start it u need to give it throttle for a few seconds to keep er running and when she does stay running she idles really low, then if your not giving her gas and you cut the wheel shell cut out. #1. I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. 1988-1999 Chevrolet & GMC C/K GMT400 Platform. <b>Chevy Lumina 1991, Camshaft by Melling®. Customer complaint bad gas mileage and a surging condition at idle, sometimes. At start up it was 30+psi and as the engine warmed it dropped to below 10psi. This is a great informational site. The truck sat for 2 weeks without being started. new tune up,. . I got it cheap because it wouldn't go into reverse, took it to the trans shop. 0 305 engine,has a rough idle,wants to stall at stop signs and bogs down when accelerating. If your Chevy Silverado is having any of these problems, you can get a replacement coolant temperature sensor from O. . Tighten the six bolts in a crisscross pattern to 132 inch-lbs, and then again to 22 ft-lbs. They used about 12 different calibrated options. They used about 12 different calibrated options. . Right for your vehicle and lifestyle Made from high-quality materials for ultimate durability. rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get. 1991 CHEVROLET SILVERADO. Chevy Silverado. . . 1994 Chevrolet K1500. 11-09-14 01:12 PM - Post# 2497312 Hi all I have 1991 chevy silverado 5. 04-15-2006, 01:51 AM. - Idle Air Controller (IAC) - Coolant Temp Sensor. I've had to replace the ignition module that sits at the base of the distributor a few times, but the failure mode was always that it would start and run, but wouldn't apply any advance, run a little rough, and would throw a trouble light. C/K 1500 2500 Silverado 350 / 5. SOURCE: 1997 chevy silverado 1500 350 vortech, new fule pump not working. .