I have a 91' z28 1LE, 305 tpi w/ 5-speed manual. the car seems to have like 1/2 the power it should. it's just slow now. i hooked it to my friends auto x-ray EZ-link , to the onboard computer. it said it had a code 43 spark controll failure. i have replaced the plugs, wires, and cap and rotor. it still runs the same, i am suspecting the distributer is bad. the owner before me put in a jacobs performance ignition, it's fairly new, could he have installed it wrong or do you think the distributer is the prob. any one who knows about this code 43 please help me out

 

Code 43 on your year is a knock sensor problem, check the wiring going from the knock sensor, to make sure it is not grounded out. Should be a dark blue/white wire.

nick

 

C-P,

Welcome Aboard!

The Jacbos box is a nice unit - if it is installed correctly. Do as 89-Blue suggested with your detonation sensor. If the sensor checks out, and the wiring is good near the sensor, check the wiring at the ECM. Your '89 should not have a separate ESC control, so there are no extra connections to check other than at the ignition and ECM.

 

where is the sensor located at? i have never messed w/ one before. i'll check out the wires on it.

 

It threads into the block on the pass side, behind the starter, just above the oil pan.

 

I noticed you lived in Rockford..i live in elgin..not too far from ya..just thought i'd throw that in

 

ya, i'm up in elgin once in a while, used to chill w/ this girl up there, anyway if ur ever in rockford or plan to come down some week end, e-mail me or send me an IM @ sbcsixtythree@aol. there are bout 2-3 bad *** 3rd gens, alot of new ws6's n 96-02 ss camaros. we cruise together sometimes, we had like 6 z28's n one vette tonight. so let me know if u plan on cruis'n down here.

 

whoa, behind starter, that's a bitch to get to, is this an easy do-it-urself job? i doesn't sound like it, should i just take it somewhere.

 

Sorry, I guess "behind" was the wrong word to use, Try between starter and engine mount. If you are just checking the wire its easy to get to, but changing the knock sensor can be a pain and when you get it out coolant will run out of the block.