Welcome to the Michigan FBody Association website.
The Michigan FBody Association is a centralized website for FBody enthusiasts to discuss what's going on in the Michigan area. MiFbody.com was created to allow for an easy one-stop place to find out what's going on in Michigan as far as FBody events, to find out what clubs are available in your immediate area, and for an easy place to post classifieds for items you want to sell! Our goal was to create a more close-knit community of FBody enthusiasts in the state of Michigan, and to bring Camaro and Firebird enthusiasts alike together for some amazing FBody events!
The most important thing to know about the Michigan FBody Association is that we are NOT a club! The Michigan FBody Association is open to everyone, and is a community. Thus, we will have get togethers, casual cruises, events, and such like that, but this is not an exclusive club and it's 100% free to join this site! So what are you waiting for? Register now!
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supercharged lt1 dosent want to go into closed loop
supercharged lt1 dosent want to go into closed loop
have a procharged lt1 that over the last year seems to be slower and slower to go into closed loop,and also seems to be running richer than it used to during first start up,part throttle and idle suck now,but at wot it runs good,any suggestions.
mike m71vega@yahoo.com
already has heated 02's,was tuned by vecter performance a few years ago and it ran great,but recently wont idle,tryes to stall or hesitates then takes off,fine at wot.this started to happen ocassionaly but now its all the time,yes both 02's are new (tryed bosch and delco ,no change)new wire new plugs,have a lt1 scanmaster on it,no dtc codes ,any other numbers on the scanmaster that would be helpful?.yes the 02s are heated.
thanks,mike
02's are not used at WOT so it sounds like 02's but...
clean the maf
are you using 02 extensions? does the car come up to temp like before? t-stat stuck open?
Is it a 1993 engine? I've got Datamaster that we can data log with but I only have a cord that is for OBD1s with an OBD2 plug (1995 model year) though I can rig it up to work on an OBD1 plug with some jumper wires.
already cleaned the maf,not using a thermostat,just a resrtricter(using elec water pump),car was origanally built by automotive performance engineering in mt clemens.,it ran great for a long time and slowly got worse,so somethings going bad.i know most of the electronics are newr than 1993,lot of custom wiring,has lsi maf on it ,couple of guys at katech were also invlved in building ,going to go back to vector and get a hold the origanal builder. isnt the scanmaster lt1 kinda act like a cont monitoring device(kind like data logging)
thanks for the input so far.
mike
Haha kidding aside, yeah it definitely sounds like something's going bad. Steve might be able to figure it out - he works at Vector Performance now and is a sponsor on our site for his tuning business he does on the side. Datamaster will let you output the logs to a computer for review later - does scanmaster do that? I've heard scanmaster a lot but I always thought it was just a gauge for in the car, not necessarily to log to computers for later review? If Scanmaster functions like like Datamaster program I use, you should be able to watch the o2 sensors and see what kind of readings they're getting and also see if they're updating consistently fast or if they're getting slow and laggy to change values.
actually i guy that worked for ape ,it was his personal car(mike fortuna),i cant say anything bad about them,had the car for 5 years,went 10.85 on street tires,pump gas and drive the car almost everyday back and forth to work(25 mile each way) and this is the only issue ive had
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357ci LT1, cammed, stalled, and driven. 
Problem solved.
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