Originally Posted by
4 l-bodies
I remember a father at SDAC-14 in Waukegan that was so pround of his son's SD. After talking to him for 10-15 minutes I went over to look at his son's vehicle. I noticed the AIS motor had a cut off wiring pigtail and asked him about that. He said yeah we fixed that idling problem. We just cut the wires to it and controlled the idle with the set screw. Works a bunch better now. His son's entire engine bay pretty much was like this. Just about every other sensor was snipped off and eliminated. I looked at it and said yeah you guys fixed it all right (lol)! To his credit the vehicle was there though. I don't know if it was driven or towed to the hotel. My point is there is fixing it and there is FIXING it.
I am aware that he is attempting to run a 1 piece intake with 4 wire AIS motor. Explain to me how a logic module designed for a 2 wire AIS motor will control a 4 wire AIS properly? That is what I meant. On 86, you have red 22 AIS close signal (N-2 circuit) and red 18 AIS open signal (N-1 circuit). That is it. A 4 wire AIS motor needs those in addition to red 16 (N-4 circuit) and red 20 (N-3 circuit) to function properly. These two are open or blank in the 85-86 log manifold LM. So you guys just hook the wires to a blank circuit and expect them to function? Sure the vehicle will start, but will it control idle as it should with 50% of the circuits not functioning? Like Dr' Phil says, "how's that workin for yeah"?
I agree, plenty of LM cars out there that run fine. 87 LM wiring will do the job. If you have a 88/89 harness available that is close to a plug n play, and you really only need to match up the 50 pin bulkhead connector wiring, that IMO, isn't a ton of work. It seems like six of these and half dozen of those to me. Since you guys seem to think that less is more, why even bother changing out the one wire o2 circuit? 85-86 LM cars used a 1 wire. That will still function just fine with a 1 piece, 2 piece, log manifold, or any sort of manifold you put on there. Run a 18mm tap through swingvalve so it gets a good ground and be done with it. The 3 & 4 wires were done for emission reasons and for better grounding of o2. The OP seems to be slightly lost with the wiring mods (who wouldn't be without a FSM) so why change the o2 wiring out if he doesn't have the proper tools (FSM) to do it correctly?
Todd