Posted by Frank on December 21, 01 at 11:00:25:
OK, here's what I have, 87 3/4ton burb 5.7 tbi with Edelbrock intake, 1" tb spacer, Jet Stage 2 chip, K&N open element, True 2 1/4 duals with blowmasters, th400 and 3.73s
The problem I can't seem to lick is the truck runs great when it's warm and when cold but in between it runs lean. I hooked up an A/F guage to monitor it and when I first fire it up and drive it it runs rich then starts leaning out to where it doesn't even register on the guage. Unless I stomp it then it will switch over to rich and come alive. But once it warm all the way up it seems to be fine, only giving intermitant problems.
Here's what I've replaced, Map sensor, Tps, Coolant temp. But I used a Standard coolant sensor so It could be bad right out of the box.
Any sugestions? I'm stumped
Thanks
Frank