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Old 11-11-2019, 08:56 PM   #301 (permalink)
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Figured I was due for an update since it's been a while since I posted anything here.

Since the Insight doesn't have bluetooth, and I prefer to keep the stock radio, I recently ordered a FM transmitter to be able to stream music from my phone. My sound system has a higher calling than merely playing radio music, especially through those patches in the WV mountains where every station only plays country music. I'm not opposed to country music, but listening to it for a couple hours on end does get old.

Another reason for ordering this is partly from what Daox discovered in his alternator delete thread, namely that the Scangauge isn't completely accurate with voltage readings, something I was not previously aware of. Voltage readings on my Scanguage are slightly lower than actual voltage. The FM transmitter I ordered has a 12V battery voltage readout, fingers crossed that is more accurate. If not, then I'm not really any worse off than I was before.

This will allow me to set the fourth data display on the Scangauge to TPS, so I can keep honing in on my lean burn driving. This will let me view coolant temp, intake temp, engine load, and throttle position all at once, in addition to the 12V voltage readout on the transmitter. If I gain enough momentum on the downhill, and have the throttle right at the very limit of lean burn, I can climb most hills without going out of lean burn or downshifting.

However, my lean burn limit seems to vary depending on day and weather. Some days I can maintain lean burn up to 87% load; other days it will kick out at 81% load. Some days I can get as low as 70-75 mpg before it kicks out of lean burn, other days it will kick out of lean burn if I go below 85 mpg. 5th gear, of course. Hoping TPS can help shed light on this.

Down here at college I only drive once or twice a week, and my longest drive is 11 miles one way. Because of this, the engine spends a decent amount of time not warmed up, even with my full lower grille block. Because of that and all the hills, I do quite a bit of EOC to offset the mileage hit whenever traffic permits. Mileage has been in the 90s down here when the weather was warm (60+ *F). Recently temps dropped to the 40s so mileage has dropped to mid-upper 80s. The two times I didn't hypermile, once due to traffic and another due to running late, were both about 20 mpg lower. I'm guessing my old Civic would've been in the low 40s mpg if I had that instead of the Insight, mostly because I couldn't EOC in it (autotragic).

Probably a solid 10%-20% of my driving is EOC. Between that and the car just sitting most of the time here at college (another reason why I'm glad I deleted the hybrid system), it seems like my 12V may be living a rough life. Hopefully it lasts for a while longer, but if not then I'll be looking into a LiFePO4 replacement that I can easily disconnect and bring into my dorm to keep topped off, and of course reinstall a switch to turn off the DC-DC converter.

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Old 11-11-2019, 09:26 PM   #302 (permalink)
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I'd love to have weather in the 40's. It's supposed to get down to EIGHT here tomorrow.

I want to say the highest load I've seen lean burn hold was around 91%. Would you have any interest in my old ECU? I'm not sure if the plugs are the same, but I have no use for it at least.
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Old 11-11-2019, 11:25 PM   #303 (permalink)
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Quote:
Originally Posted by Ecky View Post
I'd love to have weather in the 40's. It's supposed to get down to EIGHT here tomorrow.

I want to say the highest load I've seen lean burn hold was around 91%. Would you have any interest in my old ECU? I'm not sure if the plugs are the same, but I have no use for it at least.
Crazy cold! Coldest it's been down here so far was 33 *F at 6-7 in the morning a couple days ago. I'd like to be able to keep above 80 mpg this winter, but we'll see. Considering that Michigan already has snow this may be a hard goal to meet, since I was getting in the 70s last December back home in a milder winter.

I've seen lean burn as high as 92% load before, but not very often. Usually when I go above 87% load it kicks out. Maybe when I'm that close to the threshold my foot just isn't steady enough to keep it from deviating a percent or two. IIRC someone on IC posted at what TPS the car will go into lean burn and when it kicks out, so I'm hoping that'll help some.
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Old 11-12-2019, 02:13 AM   #304 (permalink)
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Hopefully your bluetooth device fits in your car better than mine, but it is a great setup. I just put this in my car:

Mpow Car Phone Mount

The CD player did not work the last time that I tried. I believe that I needed to shove a pin in the pinhole to eject the disc. This clamps into the CD player and the weight of the phone makes the sides close in. I have only used it for a couple of days, but it works well. It is just a bit close to the shifter. I may have an automatic, but I still shift. It is great to have the phone right where I can see it so I can see whether or not to ignore whoever is trying to reach me. It also makes it easier to charge.

Part of the appeal of a bluetooth interface is not needing to touch your phone, so I guess that being able to touch it easier is redundant.
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Old 11-12-2019, 10:40 AM   #305 (permalink)
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I'm using something similar in the car right now - goes right into the CD player that I never use. I found that the normal magnetic or suction cup ones would continually fall off unless you accelerated like a granny or took corners at 1 mph.
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Old 11-12-2019, 11:12 AM   #306 (permalink)
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I am going to say your lean burn results are atmosphere related. Possibly note which days are odd, then note the density altitude and humidity. Preparation is always better than just responding.
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Old 11-24-2019, 09:49 PM   #307 (permalink)
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Clutch went out on me halfway through my drive home for thanksgiving break. My dad was awesome and was able to borrow a truck and trailer from a friend to being me the rest of the way.

The car will shift with the engine off, but will not shift with the engine on. Suspecting it needs a new clutch pad - 265,900 miles on the odometer and no clutch replacement indicated on the Carfax so it appears to be the original clutch. There were absolutely no indications of failure prior to it failing, unfortunately.

How much wear does bump starting put on the clutch?

Of the 700 mile trip, the first 200 mile leg is pure mountains; for those mountains I was only at ~73 mpg; by the time the clutch failed at ~330 miles I was up to 79.4 mpg. Was hoping to get above 85 by the end of the trip, but alas.
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Old 11-24-2019, 10:48 PM   #308 (permalink)
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Sounds more like a hydraulic failure to me.
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Old 11-25-2019, 01:03 AM   #309 (permalink)
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Agreed, sounds like a master or slave cylinder issue, maybe lost some fluid or perhaps an issue with the throw-out bearing lever.
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Old 11-25-2019, 07:18 AM   #310 (permalink)
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Any additional usage of any device on the car, whether it be the clutch or any other feature, surely will wear it out earlier than if there is less usage.

So, it saves fuel to stop/start the engine, but it wears something out more than otherwise.

The unanswerable question is: is the savings in fuel more or less than the expenditures in repairs?

Like most things in life, I suppose the answer is: it depends.

It depends on the cost of fuel saved vs the cost of materials and labor and associated aggravations to fix whatever breaks earlier.

It's great to have little choices in life.

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