chevy 305 how

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  #1  
Old 01-12-09, 03:58 PM
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chevy 305 how

I have a 95 chevy silverdado with a 305 engine, for the last month it has been sputtering when i step on the gas, the truck has new pick up coil, ig module,ig coil. I am wondering if the fuel pump is either going bad or clogged some how? ideas,please. thanx
 
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Old 01-12-09, 04:05 PM
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I would start by replacing the fuel filter. It's a cylinder shape located on the frame rail. If that doesn't fix it, I would check your fuel pressure. Chevy's have been known for bad pumps too.


 
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Old 01-12-09, 04:13 PM
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i forgot to mention that i had replaced the fuel pump. i can hear the fuel pump run when the key is turned on, but somehow the the fuel is not getting to the tbi constantly.
 
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Old 01-13-09, 04:49 AM
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Check the fuel pressure, the fuel pressure regulator on the throttle body could be going bad. Also make sure the vacuum line is hooked to it, and has vacuum when the engine is running, high pressure could drown the plugs, low pressure could cause your stumble. I can not recall the fuel pressure spec. for throttle body injection maybe one of the other guys will check in and add that for me.
 
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Old 01-13-09, 07:01 PM
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chevy 305

Fuel press 12-20lbs You will need an adapter to check press as I dont believe there are test ports onTBI RW
 
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Old 01-13-09, 07:06 PM
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chevy 305

Disregard above message if you have TPI press on them is 60 lbs
 
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Old 01-14-09, 02:51 AM
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You didn't mention replacing plugs and wires. That would be my first thought based on the same problem with my '93 Silverado.
 
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Old 01-14-09, 03:26 PM
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Does this only happen when you slowly accelerate from a stop? If so unplug the vacuum line at the EGR valve and see if the problem goes away. I've seen a few EGR's cause that problem.
 
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