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intermittent engine light

 
 
 
 
  #1  
Old 11-18-2006, 12:17 AM
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Default intermittent engine light

ok, i have a 89 full size blazer w/a 350 TBI. at engine speeds at or over 50 mph my light comes on. when i check the codes it comes up 32 and 42. its relates to the map sensor and module not getting a signal. it doesn't idle on its own w/o pressing on the gas when its cold. thing is it runs great. tows 6-7 k fine. i've replaced the egr and solenoid but still having problems. any ideas or common problems with this engine like this? TIA!


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  #2  
Old 11-18-2006, 12:52 AM
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Default RE: intermittent engine light

I believe a common problem is for the throttle body base gasket to blow out. It's a cheap fix to replace the base gasket and it only takes about 1/2 hour.
 
  #3  
Old 11-18-2006, 06:27 PM
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Default RE: intermittent engine light

OK, Thanks i'll give it a try!
 
  #4  
Old 11-19-2006, 11:07 AM
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Default RE: intermittent engine light

An easy way to check your throttle body base gasket is to spray carb cleaner at the base and see if it is sucking it in. I changed mine on an 88 that I had. Hardest part is being very careful with fuel inlet lines. Otherwise was a snap.
 
  #5  
Old 11-19-2006, 05:52 PM
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Default RE: intermittent engine light

should i do a TBI spacer too? do those actually work?
 
 
 
 
 
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