LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Codes 32, 48, 64, may have found source of skipping and hesitation inside...

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Old Mar 26, 2004 | 05:53 PM
  #1  
Robbie's Avatar
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From: Greenville SC USA
Codes 32, 48, 64, may have found source of skipping and hesitation inside...

Well got a buddy to scan my car and we found these codes. They are as Follows.


32= EGR

48= MAF sensor circuit

64= Right bank 02 sensor circuit (lean condition).


Since installing longtubes a couple years ago I blocked off the egr pipe inlet but left the egr vavle itself on with the vacume line running from it to the intake manifold. I had no problems until lately. I know my intake manifold is leaking and has been getting worse. What I think is goin on is that my egr valve is acting up, plus the vacume leak from the bad intake manifold leak is causing the MAF code to pop up because there is air entering the engine that isnt being accounted for. Also maybe the extra air entering the engine and not being accounted for is making the MAF not add the extra fuel causing the lean condition on the right bank 02 sensor. All in all I think the bad intake manifold leak and faulty EGR valve is causing my fluttering/skipping problem. Will repair these 2 and let you know the rest. What do you guys think? Sound logical?
Old Mar 26, 2004 | 09:13 PM
  #2  
Injuneer's Avatar
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From: Hell was full so they sent me to NJ
I'd look at the MAF first.... DTC 48 generally means that the sensor isn't getting power, or is damaged and not producing a signal. Pull the harness connector off and check for +12V on the pink wire in the harness connector (key on, engine not running).
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