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Old Aug 19, 2021 | 08:28 PM
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  #21  
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donbrew
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Does anybody see #14?
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Old Aug 19, 2021 | 09:06 PM
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RJ_RS_SS_350
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Originally Posted by donbrew
Does anybody see #14?
Yep
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Old Aug 20, 2021 | 07:03 AM
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Originally Posted by donbrew
I got no idea what MAF sensor voltage you think is right, but it is frequency that it sends to the ECM. Should be between 1700 and 12500 Hz, 65535Hz idicates a short or open circuit.

The DTC disables the boost control and limits the boost to mechanical only.




Yes, and I read it all. Thank you for posting that information that could resolve this problem.
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Old Aug 24, 2021 | 05:44 PM
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tempestram
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From: louisville, kentucky
Cracked IC.
Who sells an oem ic?
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Old Aug 24, 2021 | 07:38 PM
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ZZP has an upgrade intercooler.
Last edited by Oldblue; Aug 25, 2021 at 06:33 AM.
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Old Aug 24, 2021 | 09:28 PM
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RJ_RS_SS_350
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Originally Posted by tempestram
Who sells an oem ic?
You'd really be better off with aftermarket. Lose those crappy plastic end tanks. ZZP makes a nice one.
https://zzperformance.com/collection...c/intercooling

Not sure if anyone has the OE.

EDIT: Looks like Rockauto has it.
Last edited by RJ_RS_SS_350; Aug 24, 2021 at 10:02 PM.
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Old Aug 25, 2021 | 07:55 AM
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tempestram
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From: louisville, kentucky
I purchased the ZZP exact replacement IC. Thank you guys very much for your help. I learned a lot while troubleshooting.
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Old Aug 25, 2021 | 09:29 AM
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RJ_RS_SS_350
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No problemo, glad to help.

Many people have shimmed the intercooler out, to increase clearance between the AC compressor and the TMAP sensor. Here's what I did instead.
https://www.chevyhhr.net/forums/how-...ive-way-62943/

Everything is still working great.
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Old Aug 27, 2021 | 12:40 PM
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Originally Posted by donbrew
Does anybody see #14?
Yes, with interest, thank you!

What does “mechanical only” boost mean?
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Old Nov 1, 2023 | 09:01 AM
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RJ_RS_SS_350
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Originally Posted by donbrew
I got no idea what MAF sensor voltage you think is right, but it is frequency that it sends to the ECM. Should be between 1700 and 12500 Hz, 65535Hz idicates a short or open circuit.

The DTC disables the boost control and limits the boost to mechanical only.


Donbrew, I now have a digital VOM. How do I test for this?
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