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1989 Chevy Van 305 stalls


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Anonymous Poster
andy@rocketmail.com

Jun 29, 2009, 1:55 PM

Post #1 of 3 (1734 views)
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1989 Chevy Van 305 stalls Sign In

1989 Chevy G 20 sportsmen with a 305 8 cylinder.

I was driving at about 35 to 40 mph when the vehicle began to feel like it was running out of gas. It began to strain and stalling. I got it home (just barely) and parked it. A few hours later I got back in tried to start it. The vehicle fired up but idle a little rough. I put it in drive and it stays on but if I apply even the lightest touch to the gas pedal it stalled out. The idle is high in Drive and reverse but not in neutral or park. When I put the vehicle in reverse and it slams pretty hard.
I have done a lot of work to this vehicle and the symptoms have gotten a little better the vehicle still stalls. I changed the fuel pump and cleared the line between fule pump and inline fuel filter with an air compressor. Cleared the line between the fuel filter and throttle body. Replaced the fuel filter. I replaced the Throttle Position Sensor, Air idle control sensor, EGR valve. I have checked over all the vacuum lines and air cleaner. I replaced fuel pressure regulator. I replaced the Distributor and it came complete. Cap, Rotor, Spark plugs. The TBI injection system is spraying a even and strong cone of fuel. I have checked the timing and had a mechanic check the timing and it is correct. Any help with this one is appreciated I am at my wits end.


Loren Champlain Sr
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Jun 29, 2009, 2:30 PM

Post #2 of 3 (1730 views)
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Re: 1989 Chevy Van 305 stalls [In reply to] Sign In

The symptoms sound to me as it is over-fueling. This can be caused by a number of things. The coolant temp sensor could be telling the computer that the engine is colder than it actually is. The engine could be running too cool (thermostat missing, stuck open). Gasket between the throttle body/intake leaking, sucking air. MAP sensor could be seeing a drop in intake manifold vacuum or is defective or a poor vacuum source to it. A scanner would be very helpful. Seeing what the computer is 'seeing'. The TBI system uses an IAC (idle air control) solenoid to control idle speed. These can/do get dirty and sticky. It can be removed very easily, and cleaned.
Loren
SW Washington


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Anonymous Poster
andyurban@rocketmail.com

Jun 29, 2009, 6:00 PM

Post #3 of 3 (1727 views)
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Re: 1989 Chevy Van 305 stalls [In reply to] Sign In

wow thanks a lot. I am gonna looking that cooling. Sorry I thought I put down that I replaced the IAC but I missed is in the long list. I have replaced the IAC. A scan tool would make it easier but can seem to find anyone in my area who carries one for 89's.




1989 Chevy Van 305 stalls


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