Bad opti causing code 43(ESC)?
Bad opti causing code 43(ESC)? My car (94 lt1 m6) is missing and bucking when...on the highway at a low rpm and try to give gas, when wot and approaching higher rpms. It is running really rich, puffing black smoke sometimes on acceleration. All this leads me to think my opti is bad. I scanned it yesterday and the esc 43 code would not erase,,,, could this be from the opti or not? Also the snap on scanner said my car was 20* advanced while sitting at 880rpm.
Last edited by 87tpita; Jun 3, 2009 at 09:33 AM.
My car (94 lt1 m6) is missing and bucking when...on the highway at a low rpm and try to give gas, when wot and approaching higher rpms. It is running really rich, puffing black smoke sometimes on acceleration. All this leads me to think my opti is bad. I scanned it yesterday and the esc 43 code would not erase,,,, could this be from the opti or not? Also the snap on scanner said my car was 20* advanced while sitting at 880rpm.
Could be excessive knock retard, don't know what the timing should be.
Might as well test your fuel pressure and clean your MAF.
How old are the plugs, wires, and o2's?
TECH Veteran
Joined: Dec 2008
Posts: 4,148
Likes: 63
From: Little Rock, AR
Code 43 has nothing to do with the opti. It's your knock sensor circuit. The computer will retard timing 10° or more to protect the engine while the code is active. You will probably notice less performance than normal.
http://shbox.com/1/4th_gen_tech2.html#knock_sensor
http://shbox.com/1/4th_gen_tech2.html#knock_sensor
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'
Brett Foote
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
