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

Help with codes please.

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Old Jul 11, 2004 | 02:58 PM
  #1  
97WRAITH's Avatar
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From: ontario,canada
Help with codes please.

I scanned the car with datamaster last night becasue I still have a part throttle miss/stumble I can't figure out.The ses light is NOT on.Here are the codes I got.

MALF13-Left o2 fail
MALF 48-Malf system fail
MALF66- A/c press sensor open/short

Can some one explain this it looks straight forward just want some feed back.Thanks!

Rob.
Old Jul 11, 2004 | 03:53 PM
  #2  
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From: Little Rock, AR
I guess you are OBD-I converted?

Just to be sure, you might clear the codes and see if they all return. You might have burned O2 wires, a poor power connection to the MAF (fairly common-check the pink wire for 12v with the key ON), poor connection/wiring to the a/c sensor or bad sensor.

As always, check fuses.
Old Jul 11, 2004 | 04:02 PM
  #3  
97WRAITH's Avatar
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From: ontario,canada
Yes OBD1 converted. Sorry forgot to mention that the a/c is removed but I have never gotten that code before.I'll clear the codes and check fuses.Did you mean to check for power to maf sensor? Thanks Shoebox.

Rob.
Old Jul 11, 2004 | 04:07 PM
  #4  
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Just an FYI If you use Tuner from CATS you can disable all the AC codes very easily.
Old Jul 12, 2004 | 08:58 PM
  #5  
97WRAITH's Avatar
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From: ontario,canada
Well did some checking and it seems like I have this stumble miss problem after the car warms up.When its cold it runs fine.Opti maybe?
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