Topics

1

General Buick Tech / Heater valve vacuum problem

« on: April 22 2022, 07:09:40 PM »

Hi,
My heater valve is opening during boost and even light driving affecting my AC air. I'm sure it's the valve as I bypassed the heater core and I get cold AC all the time.
I assume a bad or missing check valve or something else?
There is 1 check valve on the drivers side going to the metal vac line. That one is ok.
Are there others?
Any tips on how to troubleshoot?

Also, when I turn the car off the heater valve maintains a vacuum source for hours.

Thanks

2

General Buick Tech / Running lean. PL review

« on: July 22 2012, 09:49:46 AM »

I'm looking for some Powerlogger review help.
See attached. There are 3 highway wot runs on there with incrementally more boost added.
I have a TT chip and PLX wideband. Fuel is being logged. Running 100 octane.


Why are my BLMs climbing on the 2nd and 3rd run? It's trying to add fuel but my pressure is falling. It's a new Walbro FP and I tried 2 FP regulators.
Are my injectors maxing out? Is the pump being maxed out? Am I flowing to much?
Any comments?
Thanks!!

3

New Member Introductions and Welcomes! / New to forum

« on: July 21 2012, 10:09:35 PM »

First post and just saying hi from hot sweltering  NJ!!