Quote:
|
Originally Posted by FastRegalWE2 I logged a warm and cold idle file. Ever since I put on my 200AMP alt, when I hit the brakes (PM) or turn on the heat/AC the engine dies down for a second. I havent gotten any response to the PMs I sent asking about the alternator. 
If someone can take a look at the 2 Id be forever in debt, wait I own a Buick, so I already am  |
alot of times OLD Buick wiring (grounds) will cause what you are experiencing. The ECM is probably seeing a blip on the TPS or MAP sensor causing it to add/pull fuel. Create a dash and log the TPS, MAP and engine rpm as well as actual A/F ratio at 20 frames/sec and tap the brakes to see what they are doing. Post back the results.