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Hyundai Sonata Engine Questions

48 messages,  Last post on Mar 08, 2008 at 8:32 AM

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What is this discussion about? Hyundai Sonata, Engine, Sedan

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#9 of 48 Re: Engine breaking during gliding. [snakeweasel] by donx1 Oct 10, 2006 (10:56 am)
Replying to: snakeweasel (Oct 10, 2006 4:58 am) I cruise at 30 mpg for a while and then anticipating some stopping ahead I take my foot off the gas. I checked this morning and the car is in 4th gear. As soon as I take my foot off the gas, I can feel the car engine breaking but it doesn't show any downshifting taking place. If I manually down shift to 3rd the engine breaking becomes significant.   I did a little test. It takes about 14 seconds for the car to slow from 35mph to 25 mph when it is in gear with my foot off the gas. If I throw the car into neutral immediately after removing my foot from the gas, it takes over 35 seconds to effect the same slow down. A look at the RPMs shows the difference as well, 1500 dropping to about 1000 rmps with my foot off the gas versus an immediate 800 rpms in neutral. I assume that's gas saved but I didn't know if the amount is significant.   Your right my '95 Sable does show some effect but not nearly as significant as the Sonata. I wondered if it was a breakin thing or if that is permanently how cars behave these days?   Replies to this message: mamamia2 (Oct 10, 2006 11:38 am) snakeweasel (Oct 10, 2006 12:14 pm)
#10 of 48 Re: Engine breaking during gliding. [donx1] by mamamia2 Oct 10, 2006 (11:38 am)
Replying to: donx1 (Oct 10, 2006 10:56 am) No, not a break-in issue, and again, this is how most, if not all newer cars behave.   And again, if you drive an Accord, you'll feel it even more... Actually in the Accord's case, the NEWER Accord has this a bit less pronounced than the older Accord... My '95 Accord was almost annoying the way it would down-shift the second I lift my foot of the pedal, at around 30-40 MPH. Our '05 Accord is more smoothly doing it, but still more noticeable than my Sonata. It's called something like "downgrade logic"...
#11 of 48 Re: Engine breaking during gliding. [donx1] by snakeweasel Oct 10, 2006 (12:14 pm)
Replying to: donx1 (Oct 10, 2006 10:56 am) I did a little test. It takes about 14 seconds for the car to slow from 35mph to 25 mph when it is in gear with my foot off the gas. If I throw the car into neutral immediately after removing my foot from the gas, it takes over 35 seconds to effect the same slow down.   All cars will have a similar effect. When you put the car into neutral you completely disengage the engine, your RPMs should go to an idle rate. But if you keep it in gear the engine is still engaged and will slow the car down significantly.
#12 of 48 Re: Engine breaking during gliding. [donx1] by lightfootfl Oct 10, 2006 (1:39 pm)
Replying to: donx1 (Oct 09, 2006 11:58 pm) I read on another posting yesterday I think it was:...it is possible in some situations and vehicles, that you can "tap" the accelerator pedal after you left off the gas, and it will "disconnect" that drag. I haven't tried it yet on my vehicle, but I am certainly going to give it a try. It can't hurt anything to try. Who knows? It may be a definite asset, or it may never work at all.
#14 of 48 Re: Engine breaking during gliding. [donx1] by osaka75 Jan 24, 2007 (11:44 am)
Replying to: donx1 (Oct 09, 2006 11:58 pm) I had the same experience with my GLS V6 when new. I also wrote to this board and someone wrote back that it might be the torque converter locking as it should. After slowing down for several seconds, I felt that the "engine braking" freed up and the car would then slow as expected. I have no idea what it was but after a few thousand miles I stopped noticing it. I think it just went away, at least enough that I don't notice it in my everyday driving.   I'll also add that I think that the transmission is supposed to learn our driving over time. I like how mine performs now better than when new. Perhaps these two items are related.
#15 of 48 Idling Problems when car is HOT by 95sonatav6 Mar 25, 2007 (11:23 pm)
95 Sonata, V6 auto. 90K miles. My car starts right up/idles fine on the first start of the day. Car is used for pizza delivery. At a customers house I stop the car, collect the money and restart the car within 2 minutes, it starts fine. But after returning to the pizza store, I might wait 10-15 minutes before I go out on the next run. At this point the car will not hold the idle and dies. I must restart the car 5-6 times as well as revving the engine for about 10 seconds before it will hold(barely). This scenario is the same for each run. What's interesting is that I had this problem in the Fall but it disappeared when winter set in. Now in March, with temps back in the 70s and 80s it's reappeared. Also,if the engine is off for an hour, then it starts fine. Hopefully I've given enough details for someone to make an educated guess. Thanks.
#16 of 48 Question, re "pop-up id of contributor" by lightfootfl Mar 26, 2007 (5:22 am)
TO: Administrator ???? I have noticed recently that as my mouse goes over the name of the contributor that I get "info" about them. This is fine, except that I haven't figured out how to get rid of that info to read some of the comments under the "tag". I have tried going up and down, etc.. and I can figure out how to read them, but couldn't that "pop-up info" be made to disappear in a few seconds?? I am really more interested in the comments than the info about the contributor. Please consider an adjustment of sorts. Thanks, van Replies to this message: pat (Mar 26, 2007 6:46 am)
#17 of 48 Re: Question, re "pop-up id of contributor" [lightfootfl] by pat HOST Mar 26, 2007 (6:46 am)
Replying to: lightfootfl (Mar 26, 2007 5:22 am) It's supposed to disappear if you leave the cursor on the name of the poster for a couple of seconds. As a workaround, try that when it won't go away.   Meanwhile, the place to talk about this is here: Forums Software.   You are not alone in your feelings. I'm beginning to like them, but that's because I figured out how to get rid of them when they show up unexpectedly.
#18 of 48 OIL V6 engene by franmart Apr 11, 2007 (5:44 pm)
how many gts of oil do you use for a oil change Replies to this message: bhmr59 (Apr 11, 2007 6:38 pm) hotrod54 (Apr 12, 2007 3:35 pm)

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