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I have a 93 Chevy G20 Van with a 350. I have had a vacume ...
Sent to Car Experts December 13 01:08 PM

I have a 93 Chevy G20 Van with a 350. I have had a vacume problem for some time now but with the last replacement of parts it is working better. Now when the engine is cold the cruise control works fine but when it begins to warm up it will shut off. The system looses the vacume and this is what shuts the cruise control off. What could be causing this. The parts that have already been replaced are as follows. EGR Valve, oxygen sensor, Vacuume resevoir, MAP sensor, and idle control valve. Need to know what would be causing the engine to loose some of the vacuume when the engine begins to warm up. Also does anyone know where and what the turn signal relay looks like.

Optional Information:
1993 Chevrolet G20 Van 350

Already Tried:
So far I have replaced te vacuume resevoir, EGR Valve, Oxygen sensor, IDLE Vavle,Map Sensor, Vacuume lines

Customer (name blocked for privacy)
Status:  Closed   Value: $10
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December 14 1:37 PM (1 day later)
         
Relist: No answer yet.
I have a 93 Chevy G20 Van with a 350. I have had a vacume problem for some time now but with the last replacement of parts it is working better. Now when the engine is cold the cruise control works fine but when it begins to warm up it will shut off. The system looses the vacume and this is what shuts the cruise control off. What could be causing this. The parts that have already been replaced are as follows. EGR Valve, oxygen sensor, Vacuume resevoir, MAP sensor, and idle control valve. Need to know what would be causing the engine to loose some of the vacuume when the engine begins to warm up.
Optional Information:
1993 Chevrolet G20 Van 350

Already Tried:
So far I have replaced te vacuume resevoir, EGR Valve, Oxygen sensor, IDLE Vavle,Map Sensor, Vacuume lines
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