C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

code 32 and 33

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Old Nov 8, 2003 | 11:31 AM
  #1  
89blkvet's Avatar
89blkvet
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From: San Lorenzo Ca
Default code 32 and 33

First i was getting a code 32 (egr), so I changed the EGR valve and the EGR switch. Not only am I still getting the code 32, now I am getting the code 33 (Mass air flow). Is my car possesed or do i have a serious problem.. The MAF seems to be fine, I pulled it off and inspected, nothing is damaged inside and yes, the screens are still on. I changed one of the MAF relays, the power one. what do i do????


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Old Nov 8, 2003 | 11:54 AM
  #2  
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vinnies87
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From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Default Re: code 32 and 33 (89blkvet)

could be as simple as a vacume leak.... check vacume lines.... also..
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Old Nov 8, 2003 | 03:42 PM
  #3  
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Aggravated4life
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Default Re: code 32 and 33 (89blkvet)

Did you plug the vacuum line back in that goes under the TB and to the EGR solenoid?(assuming its the same as mine...this can cause a hard to find vacuum leak)
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Old Nov 8, 2003 | 11:36 PM
  #4  
BILLYD's Avatar
BILLYD
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From: Tacoma Wa
Default Re: code 32 and 33 (Bill's86Coupe)

I just went thru a code 32 on an 85, I changed the switch(most likely cause), replaced the EGR, Solenoid, finally did the complete diagnosis in manual. After having the plenum off numerous times I found the EGR passage into the plenum was plugged. I could have reached the plugged area by removing the throttle body! live & learn
:eek:
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Old Nov 9, 2003 | 12:03 AM
  #5  
65Z01's Avatar
65Z01
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Joined: Dec 2000
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From: SE NY
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Default Re: code 32 and 33 (89blkvet)

You can use the EGR diagnostic method on my site (link in sig. below) to pinpoint the problem. If the code comes at start up the EGR is stuck open; if after cruzin the EGR is not opening (or not being sensed open).

Have someone turn off the ignition as you look into the MAF opening. If the sensor wires don't glow red hot for 2sec after shut off, replace the burn-off relay.
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