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4.3 feels gutless to drive

  #1  
Old 12-31-2018, 11:51 PM
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Default 4.3 feels gutless to drive

Gday all
My 99 LS 4door Blazer has lost its grunt. Car starts,runs & drives well in both 2 & 4wd. Has NO warning lights flashing
on the dash but its gutless under acceleration. I pull plugs out & engine seems to be lean as.
Any advise on where to start checking is greatly appreciated
 

Last edited by MadMerritt; 01-01-2019 at 10:06 PM.
  #2  
Old 01-01-2019, 12:23 AM
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Could it be the transmission or torque converter?
 
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Old 01-01-2019, 12:53 AM
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It appears to be running lean? Have you checked fuel pressure?
 
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Old 01-01-2019, 01:10 AM
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Trans shifts & downshifts like normal

Not yet as didnt really know where to start lookin. But will check fuel pressure in next day or 2

Cheers
 
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Old 01-01-2019, 03:07 AM
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Check out the sticky at the top for fuel pressure checking, also check the cat for a partial plugged condition, is the outflow good or does it feel weak ?
 
  #6  
Old 01-01-2019, 07:22 PM
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Originally Posted by odat View Post
Check out the sticky at the top for fuel pressure checking, also check the cat for a partial plugged condition, is the outflow good or does it feel weak ?
Outflow does feel a little weak so ill drop the cat out today & check it

Cheers
 
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