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1995 Chevy Silverado 5.7l doesn't have spark

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1995 Chevy Silverado 5.7l doesn't have spark

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  #11  
Old 02-10-2011, 07:48 AM
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When you set the timing did you unplug the electronic advance wire?
 
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  #12  
Old 02-10-2011, 11:19 AM
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That would be the coolant temp sensor , located beside thermostat housing.
Clean those grounds in that are while your at it.
 
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  #13  
Old 02-10-2011, 11:22 AM
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Have you checked your fuel pressure? How old is the air filter? And fuel filter?
 
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  #14  
Old 02-10-2011, 11:32 AM
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Maybe the throttle body could be leaking causing the hissing? A vacum leak will cause bad hesitation on acceleration on the low end.
 
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Old 02-10-2011, 11:34 AM
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Originally Posted by RUFFNECK4LYFE View Post
Maybe the throttle body could be leaking causing the hissing? A vacum leak will cause bad hesitation on acceleration on the low end.
This is true
 
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  #16  
Old 02-10-2011, 11:48 AM
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The hissing is starving for fuel , more air than fuel.
 
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  #17  
Old 02-10-2011, 01:29 PM
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Originally Posted by RUFFNECK4LYFE View Post
Maybe the throttle body could be leaking causing the hissing? A vacum leak will cause bad hesitation on acceleration on the low end.
This is what I'm thinking it definitely sounds related to the TBI. Possibly an injector leaking? (bad o ring?) I haven't checked the fuel pressure but the air and fuel filter are brand new. I will also clean the temp sensor terminals.

Shamrock, I did not unplug the advance wire when i set the timing.

Also, I've noticed the RPM'S dropped at idle and sit at about 800 now
 

Last edited by fstcarsnguitars; 02-10-2011 at 02:19 PM.
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  #18  
Old 02-10-2011, 07:52 PM
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Shamrock knows those TBI set ups pretty good. I have heard them leak from the flaps or base, I cant remember.
 
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  #19  
Old 02-10-2011, 09:45 PM
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The injectors have a sort of "spattery sound to them and almost like a constant clicking, like a diesel motor. Is this normal?
 
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  #20  
Old 02-10-2011, 09:49 PM
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yes that is normal the click is the injector opening and closing and the other sound is the fuel spraying out......sound like they are working but I would run some cleaner through just because. never hurts to be safe and clean them
 
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