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RPM drops

  #1  
Old 09-03-2009, 03:36 AM
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Default RPM drops

Hello everybody!

when I'm in a situation like a traffic jam. when i need to apply a little gas and shortly after i need to brake. the rpm drops significantly. it happens every time and it feels like the engine's about to go off. and so - after a few times it does go off. it's like the engine can't sustain it's rpm.
any ideas?
 
  #2  
Old 09-03-2009, 05:09 AM
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what are you working on? year ,make ,etc....
 
  #3  
Old 09-03-2009, 08:03 AM
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k5 of course, 1990 5.7L
 
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Old 09-03-2009, 11:49 AM
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How's your idle and timing set? Do the RPMS fluctuate any at normal idle?
1990 is a Throttle body right? I'd check the spray pattern coming out the Throttle body. Might also be time for a top end cleaning.
 
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Old 09-04-2009, 08:54 AM
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yeah, check spray pattern, or mabey o2 sensors, or the tps. that sea foam spray works pretty good for cleaning throttle bodies
 
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Old 09-05-2009, 11:45 AM
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ok guys, i'll check it out and get back to you. thanks.
 
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Old 09-20-2009, 09:56 PM
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What did you find out?
 
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Old 09-21-2009, 02:16 AM
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actually the truck is out of order for now, i wrote about my broken rear axle.
I'm spending all of my time trying to find me a Detroit locker, it's very expensive in Israel, so as soon as i'll check it out i'll write about what I've found.

Yarin.
 
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Old 09-27-2009, 11:53 AM
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Could be a vacuum leak also.
 
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