LQ9 tuning help
Thread Starter
Teching In
Joined: Dec 2017
Posts: 2
Likes: 0
From: Littleton, Co
LQ9 tuning help I am looking for someone in the Denver Co area who is a good reputable tuner. I have a 1990 C1500, LQ9 4L60e, has a LS6 cam, and FAST LSXRT intake with a 90mm Edelbrock throttle body. The issues I have are not severe, It was tuned last summer, Havent been able to do much since then. It starts and idles very smooth, but if you try to tip in any throttle before its up to temp it falls flat and tries to stall. To me it seems like a lean condition at cold startup. When its warm, it runs very good. Thanks for any help.
TECH Addict
Joined: Aug 2005
Posts: 2,305
Likes: 126
From: Monroe,NY
When it is cold it is in open loop not using the 02 sensors. I think you need to do some ve and maf tuning. Hard to say without seeing your tune or a log file. Should be an easy fix for a good tuner.
