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Author Topic: high idle, 0507 OBDII code  (Read 2168 times)

Offline ZDan

high idle, 0507 OBDII code
« on: October 27, 2016, 11:29:20 AM »
416c.i. LS3 w/ mild cam, LS2 GTO ECU

Idle is high lately, ~1400-1500 coming to a stop, 1100 stopped.  Periodically getting a 0507 code.  Brief search suggested possible intake air leaks, sprayed around the area with fuel injector cleaner and did not note any response.

Thoughts?

Going to the track Saturday/Sunday.  Should I be concerned?

TNX!
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'94 RX-7 / 6.8 LS3 / T56 Magnum
0-184.8 in 5280'  :)  (with the old 6.0...)

Offline scuter83

Re: high idle, 0507 OBDII code
« Reply #1 on: October 27, 2016, 03:19:50 PM »
Speed density tune or MAF/Speed density stock blend?

If speed density it shouldn't hurt it, if it isn't I don't know if I would run it.  Run the risk of running lean depending on how bad the leak is. 
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Offline ZDan

Re: high idle, 0507 OBDII code
« Reply #2 on: October 27, 2016, 03:36:02 PM »
Should clarify that it was a brief interwebz search that suggested an air leak could trigger that code.  I didn't detect any evidence of one spraying FI cleaner all around the T.B./MAF/intake area.

Going to take it to a trusted friend's shop tomorrow afternoon to investigate...
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'94 RX-7 / 6.8 LS3 / T56 Magnum
0-184.8 in 5280'  :)  (with the old 6.0...)

Offline Donthitme

Re: high idle, 0507 OBDII code
« Reply #3 on: October 27, 2016, 04:03:55 PM »
TB butterfly binding?
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Offline ZDan

Re: high idle, 0507 OBDII code
« Reply #4 on: October 28, 2016, 08:23:07 AM »
Quote from: Donthitme on October 27, 2016, 04:03:55 PM
TB butterfly binding?
Don't think so but will check...
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'94 RX-7 / 6.8 LS3 / T56 Magnum
0-184.8 in 5280'  :)  (with the old 6.0...)

Offline scuter83

Re: high idle, 0507 OBDII code
« Reply #5 on: October 28, 2016, 09:19:07 AM »
Should set a code for the throttle body if it isn't making it to desired position....
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Offline 65imp

Re: high idle, 0507 OBDII code
« Reply #6 on: October 28, 2016, 11:59:42 AM »
possibly cracked the intake manifold, maybe doing some transmission work?
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absolute power corrupts absolutely  :yay:
93 FD widebody - destroked
69 Suburban - positive manifold pressure
72 Blazer - 6.0, 6speed 4wd
65 Impala - 5.7
59 cad  - 5.3
53 spartan - crash pad status
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