95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

99' 4runner enging ping

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Old May 16, 2007 | 04:33 PM
  #1  
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From: nj
Unhappy 99' 4runner enging ping

i have a 99' sr5 v6 stock 4runner with auto trans.
my problem is that my engine pings really bad at acceleration with regular gas and moderately when using the middle grade gas. my check engine lite keeps coming on setting the bank 01 lean code. could they be related?
and does anyone have any solutions?
thanks....
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Old May 16, 2007 | 04:48 PM
  #2  
kevin444's Avatar
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do you have a cel?

Did you do a tuneup?

try a different brand gas possibly top tier gas?

Run some bg44k.
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Old May 17, 2007 | 03:01 PM
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From: nj
cel registers bank 1 lean, i clear it but it comes right back
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Old May 17, 2007 | 03:20 PM
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From: Leadville Colorado
Do more than clear it then. Clearing it isn't a fix. Find out what potential problems could be and trouble shoot it.
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Old May 18, 2007 | 09:24 AM
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iholla's Avatar
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From: Anchorage, AK
Probably an o2 sensor--how many miles on your ride
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