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[Z06] Where is the ECU/computer located?

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Old Sep 5, 2006 | 03:59 PM
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Default Where is the ECU/computer located?

I am trying to figure out if the previous owner of my 03Z had a tune/chip installed. Where is the ECU/computer located for me to verify?
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Old Sep 5, 2006 | 04:28 PM
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If you mean the Powertrain Control Module, it is inside the passenger-side front wheel well. However, knowing that won't help you as these cars don't use pluggable chips. Tuning is accomplished via external software uploads thru the OBD-II port.
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Old Sep 5, 2006 | 06:21 PM
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Originally Posted by Major Smoke
If you mean the Powertrain Control Module, it is inside the passenger-side front wheel well. However, knowing that won't help you as these cars don't use pluggable chips. Tuning is accomplished via external software uploads thru the OBD-II port.
Exactly, you will not be able to get any info from looking at the ECM
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Old Sep 5, 2006 | 09:07 PM
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I am thinking that I possibly have had a tune since the Vette won't force me to do the 1-4 shift, no matter how easy I drive. No mention even comes up on the dash. This is good news, but has me wondering if the PCM has been tampered with.
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Old Sep 6, 2006 | 12:13 AM
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Originally Posted by Ryan L


I am thinking that I possibly have had a tune since the Vette won't force me to do the 1-4 shift, no matter how easy I drive. No mention even comes up on the dash. This is good news, but has me wondering if the PCM has been tampered with.
It's ironic you state this. I was going to respond to check the same things you mentioned until I scrolled down and read it. I had no idea my car had a tune until I had it dyno'ed. The car looked bone stock, but the A/F ratio was way to perfect for a stock tune. Then, I realized there was no "skip shift" light on the dash, that was just another hint of a custom tune. However, with what you stated, I'm almost positive you have a custom tune. I didn't like the idea of not knowing who tuned my car(even though the A/F looked good), so I had A&A tune it after I added an intake.

Last edited by 03 Z-oh-6; Sep 6, 2006 at 12:18 AM.
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Old Sep 6, 2006 | 12:21 AM
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I am finding more and more mods every day. I tried to lower the Vette this weekend, but the front was already maxed out since there is a 0.5" gap between the top of the spring and locking washer. If it was untouched, the locking washer should've been flush against the top of the spring, correct?
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