stanls400

Thank you everyone for your input (and info from the other related threads). The P0307 issue is resoved. I updated the 1st post with the result as well. After replacing the spark plug and wire, that resolved the issue.

I replaced spark plug #7. But I still get P0307. Other suggestions? if the wire got wet, would that eventually dry out or still cause P0307? Could an air vacuum leak "somewhere" cause a P0307?

Since I found this diagram on the site, I just want to confirm the spark plug order. When I am standing in front of the car, looking at the engine: - driver side, starting in the front, the spark plug numbers are 1, 3, 5, 7 - passenger side, from the front, the numbers are 2, 4, 6, 8 Is that the correct spark plug sequence?

FYI - I just added the symptom comment to the original post - feels like a 'rough idle.' The receipt that I have (from the previous owner) shows the plugs (and other items) were replaced at 125k (now at 141k). It does not say anything re: the distributor cap. So, I will keep this in mind as well. But I will start with plug #7. Thanks.

The maintenance that was done recently, was the changing of the power steering fluid. I used a hand pump to suck out the old fluid. Unfortunately some PS fluid squirted out and I ended up wiping the excess, spraying a degreaser (simply green), and hosing it off. The PS is another story, which I will save for another search / thread. The symptom that I feel is a "rough idle" (yes, the 'check engine light came on' and the p0307 code). Also, on the freeway, sometimes there would be a vibration that felt like my alignment was out. So, it's possible that something did get wet. However, that was about 1-2 weeks before the P0307 appeared. Yes, I am fairly new to the LS family and forum. So, the things I should check or is there a sequence that these items should be checked: 1. clean and/or replace spark plug 7 - done 2. clean the MAF - done 3. clean and/or replace coil #7 - NA for my year. 4. changed oil & filter - done. 5. check / test or replace spark plug wire - done. -------------------------- (inserting result) For my issue, after replacing the spark plug and wire that resolved the P0307. -------------------------- Or maybe my question should be 'what causes a P0307?' I use 91 gas. Thanks.

Almost forgot to reply ^_^ The issue was the battery cable bolts. When AAA came by to give me a jump, then checked the cables to ensure they were tight. Then I checked and what I found was the clamp around the post was tight, but the bolt that locked the cable to clamp was loose. Once I tightened those bolts, every worked just fine I'm not sure what the 'light burning' smell was, but everything works fine. I had the charging system checked out and everything is working fine. landar thanks for your input.

Thank you for the "safety soapbox" reminder - I rather "hear it again, than not" :) 2 years old - bought it from AAA (3 yr warranty). So, I plan on taking it to Autozone which does a free charging system test - alternator, battery, starter. If it is the battery, free (or prorated) battery. I am guessing the battery is not the best quality, but it filled the void at the time.

I will this weekend. But I jumped the car and it started just fine. Then I charged the battery. I noticed today that the car died when i was trying to start it - the engine was just starting to turnover, then all of a sudden, everything shut off - as if the battery was 100% dead. After this happened today, I thought I would check the battery, connections, & cables. (as you suggest Landar - thanks). It sure seems like something is shorting out, meaning tripping the battery power "off". I plan on hunting for a potential loose wire (maybe the wire sleeve is burnt through - the initial smell - exposing the bare wire). Also, when I jumped the car (first time via a tow truck, second by me), the tow truck driver said there was some 'draw' on the battery when he jumped it because there was some sparks when he connected the positive jumper clamp. I thought maybe the lights were on. But when I jumped it yesterday, there were sparks as well (not as bright, popping loud as the tow truck).

[my subject title was cut short = Electrical burn smell inside '96 LS400 after turning the car over (attempting to start the car) ] When I arrived home one evening - my '96 LS400... I was driving around all day taken care of errands (mix of <5mi, or >30mi). I guess I can be thankful that I made it home vs. this happening somewhere else. When I turn the key to ACC, the steering wheel auto moved (as usual), the dash / everything lights up. But the moment I turned it "on", everything shut off - no headlights, no dash, no interior lights, etc. When I stepped out of the car, I had to manually lock the door. After about 20 min, I tried the remote unlock and it worked, When I opened the door, the interior light came on. When it turned the key to ACC everything lite up. When I turned the key 'on', poof everything shut off again. I tried the 20min wait again, but nothing this time. When I first sat in the car, I could smell a hint of an electrical short / burning smell. Maybe a wire attached to the ignition key is shorted out. Or the motor for the steering wheel burned up. I did not have a chance to look at the fuses (this evening). Any thoughts re: the burning smell? Or any other suggestions?

(moved to new thread)