85 Silverado 5.0 Auto/with O.D.-Cruise, A/C, Gauges(oil,temp,volt)P/W & Locks, 4-wd. Truck is like new, reg. maintenence (until undrivable)Problem occurred at random, ran rough a short distance, then okay slowly becoming more frequent and longer lasting. It has always started easily, ran smooth but now dies at attemps to drive, hard to restart. In park/neutral, no problem. It has been to the Chevy Dealer twice, not resolved, and their solution was $75.00 spark plugs. I know better-their condition was a result of running rich-not the cause. Last time it was driven, it started and ran perfect as usual but didn't get 1500 ft. then choked up and died. Removed air-cleaner, discovered choke fully closed. I started it, removed cleaner, watched choke function as engine warmed, open when expected then closed-up and died. Doors on cleaner open/close properly. Choke light on ONLY after engine dies. Lost qauges except temp. I see what's wrong-Not the cause!! Can NOT find tech. info. Please help?
2006-06-09 12:32:51 · 2 answers · asked by pennyoutback 2 in Cars & Transportation ➔ Maintenance & Repairs
loosing power to elec. choke pull off or bad vacuum pull off
2006-06-22 03:13:17 · answer #1 · answered by The Raotor 4 · 0⤊ 0⤋
If it's a combination electric heater element and manifold bimetallic coil thermostat, then maybe the electric heater element is automatically turning off after a certain timeout interval. By then the engine heat should actuate the bimetallic coil thermostat down on the intake manifold and hold the choke plate wide open. You could verify this by hooking a voltmeter to the electric heater element and noting whether it loses battery voltage automatically after a several minute timeout period. So apparently your bimetallic coil thermostat isn't working properly.
2006-06-09 13:24:40 · answer #2 · answered by bobweb 7 · 0⤊ 0⤋