can 87 octane cause KS failure?

[captainluigi]

totally spaced out the other day and pumped 17 gal. 87 into my 96Q. realized it when i hung up the pump nozzle. thought i would just drive her really easy till i could put some 93 in her or locate some toluene. she immediatly started running like crap! the ususl bucking & jerking. i finally got some 93 into her + a quart of toluene and a bot. of isoheet. she still aint rite. its as if i randomly turn the key off. is it possible that a marginal KS would finally fail because of the 87 octane? service records do not show any KS replacement in its 110k miles, although this Q has had all its service done by an infin dealer till i got it at 98k. im rite in the middle of my busiest fishing time, it is impossible for me to undertake on a project of this size at this time. on an earlier post someone mentioned installing a 500 ohm resistor. i fully realize that this is a desperate measure, well maybe im that desperate. wher would one install this? it would be a tempoary jury rig till august when ill have time to do all the proper things including all the under the devil plenun items. would i just be better off driving as is? sorry for the longggg post.

HELP ME PLEASE

[qship96]

bad knock sensor will throw a obd2 code-look at ecu or get codes read at autozone etc my 96q with 176,000 miles still is on original k/s with no problems or codes

[captainluigi]

thanx for the respnse Qship. i have a client flying in to KW on the 10th. i can go to the autozone after that days end. can you still have codes thrown with out the check cel lighting up?

[Q45tech]

KS fail only from overheats or more than 7 years exposure to Southern heat and some times from expose to coolant leaking/spraying under plenum in combination.

The resistance is 550,000 ohms [470k +100k in series are suitable] not as easy as you think to jury rig, as you have to find the one and cut up the harness - careful the coolant temp to ecu runs in the same harness.Whatever you do don't bypass both of them in Summer heat

[elwesso]

Even with 87 octane and bad KS it should still run OK... It should still run smooth with no driveabilty problems except being a little slower.

Im wondering if the MAF conveniently went bad at the same time?

[Q45tech]

The 96 seems/acts up more severely with KS codes than the OBD1 ecued units. Some 94-95 engines with dirty plugs, etc seem worse than 90-93 units.It varies and we have never bothered to look for exact reasons.

[captainluigi]

finally got to autozone. no codes given. my understanding of the ecu is limited but i thought any time your vehicle farts, coughs or hicups that the ecu would throw a code and then that code corresponds to malfuntion. where is my thought process flawed? also, if any time a code is thrown does that cause the CEL to illuminate? mine says OK. i cant even pass the tourists on the seven mile! where do i start trouble shooting with no codes? thanx as usual.

[Q45tech]

Did the 87 octane have ethanol?............water ........isoheet after the fact can only absorb 10-11 ounces and you might have gotten significantly more water. Call the station and ask if others have had problems?

What is WOT fuel pressure?