Autos unite and help...
05-13-2004, 05:31 AM
#1
Autos unite and help...
Every auto owner knows of our dead spot in acceleration aroun 3000rpm when we floor it from a stop, even more somehow if we have an intake. I want to find a way around this. ?Did anybody find out anything yet??? I know when i installed a new MAF sensor and resetted ecu, i had absolutely NO dead spot, if i would floor it, my 17s would burn out all of first gear(bad tires) with NO dead spot. The next day it was back to that damn dead spot we all hate i dont know what it might be, maybe the coil packs, but i have come across this http://www.coximport.com/venom/400.html
I already have a techno ecu(Which i want to sell cause i am going nitrous) and i called up and they said that the venom400 could be used along with an upgraded ECU
<EDIT: this thread is not 4 me 2 sell, pm me about ecu thanx http://forums.maxima.org/showthread.php?t=306373 >
I already have a techno ecu(Which i want to sell cause i am going nitrous) and i called up and they said that the venom400 could be used along with an upgraded ECU
<EDIT: this thread is not 4 me 2 sell, pm me about ecu thanx http://forums.maxima.org/showthread.php?t=306373 >
05-13-2004, 10:39 AM
#5
the only "dead spot" I have is when my auto tranny computer is taking it's time deciding whether or not it wants to downshift. it doesn't do this every time, though... depends what rpm I'm at when I floor it. you just have to get a feel for it.
aside from that, the acceleration is pretty smooth all the way to just above 5k... I don't think there's any "dead spot" in the powerband before that?
aside from that, the acceleration is pretty smooth all the way to just above 5k... I don't think there's any "dead spot" in the powerband before that?
05-13-2004, 10:42 AM
#6
Pizda Boy
Join Date: May 2003
Posts: 2,794
the only dead stop that every auto has is in the 3rd gear...every auto has it... when you go through 1st & 2nd gear and are in the 3rd gear, accelerating with "O/D OFF" you will see that once it gets up to 3200 rpm's it will drop back to 3000 rpm's... the only solution that works & I know of is to click the O/D button to the "ON" position... even when the car is in 3rd gear but with o/d on, the dead stop is not there... try and if you don't believe me...
Sam
Sam
05-13-2004, 10:55 AM
#7
mmmmk, I'll have to try that today and see what you mean...
I usually just keep O/D on, retarded GXE speed limiter (118mph) cuts fuel before I can wind out 3rd anyway, so there's no reason to keep it off to get that extra few seconds before the shift to O/D.
I usually just keep O/D on, retarded GXE speed limiter (118mph) cuts fuel before I can wind out 3rd anyway, so there's no reason to keep it off to get that extra few seconds before the shift to O/D.
05-13-2004, 11:00 AM
#8
I was under the impression that the "dead spot" was due to the knock sensor retarding the timing due to low octane fuel... and it's only apparent when you're at partial throttle.
Hmm.. maybe we're talking about different things...
Hmm.. maybe we're talking about different things...
05-13-2004, 11:04 AM
#9
Donating Maxima.org Member
Join Date: Jul 2002
Posts: 188
Originally Posted by mchne
the only "dead spot" I have is when my auto tranny computer is taking it's time deciding whether or not it wants to downshift. it doesn't do this every time, though... depends what rpm I'm at when I floor it. you just have to get a feel for it.
aside from that, the acceleration is pretty smooth all the way to just above 5k... I don't think there's any "dead spot" in the powerband before that?
aside from that, the acceleration is pretty smooth all the way to just above 5k... I don't think there's any "dead spot" in the powerband before that?
I with you. That is the most annoying thing about my A/T. I wants to come to a complete stop in order to down shift.
As far as the dead spot while in third gear, I have never felt it. But I will look for it on my way home. Hopefully there won't be a police for the first part of my ride.
05-13-2004, 11:27 AM
#10
You guys will feel it if you keep it in 3rd when accelerating onto a highway from an onramp. You don't feel it when you floor it but you feel it when accelerate gradually up to speed.
05-13-2004, 11:52 AM
#11
I know that feel on third gear also...but i am talking about from a complete stop if i floor it tires will spin up until around 3rpms then stop a split second to catch the tires i guess, then accelerate normally.
05-13-2004, 01:51 PM
#12
There is no dead spot in autos. As much as they suck the dead spot is probably cause by a bad KS. Before you come here and announce this make sure you're right. Only dead spot I can think of besides the KS is when we pull up to a light and the POS doesn't feel like downshifting down to 1st unless we make a complete stop. That really ****es me off. There is a dead spot at around 2krpm due to this.
05-13-2004, 02:06 PM
#14
I guess. It just really is annoying. You have to stay in 3rd or 4th going 15mph unless you floor it and then it downshifts. For god's sake the rental cavalier I had for the past week automatically downshifted when I touched the gas pedal while under 10 or 15mph.
05-13-2004, 02:11 PM
#15
i hear ya, i was driving a mazda3 the other day and compared to my bro's auto max, the mazda3 was so much more fun to drive even tho it was slower, the trans really was nice, not to smooth really, but it shifted well. no need to mash on the gas to get it to downshift
05-13-2004, 03:51 PM
#17
kevlo, that doesn't explain why the RPM's drop.
I have experienced this several times but not after accelerating after every light. I know its not the KS because I'm advancing 24 degrees. Tyrexx pointed this out to me one day. I had never noticed before he mentioned it and since then have only noticed it once. Yes, I did have the OD off at that point so MaxedOutOfCash's theory is correct although I don't know why. It seems that this would be reverse. The dead spot seems that it would be the shift from 3rd to 4th but it isn't. Very odd. Is it possible that this is occuring during 1/4 mile racing at other RPM points in other gears. I say this because I ran my fastest time with my OD on. Wierd. You guys act like there is absolutely no way to make it downshift. Yes, there is. With your hand. I downshift almost everday to help jumping into traffic and my tranny is still moving along.
I have experienced this several times but not after accelerating after every light. I know its not the KS because I'm advancing 24 degrees. Tyrexx pointed this out to me one day. I had never noticed before he mentioned it and since then have only noticed it once. Yes, I did have the OD off at that point so MaxedOutOfCash's theory is correct although I don't know why. It seems that this would be reverse. The dead spot seems that it would be the shift from 3rd to 4th but it isn't. Very odd. Is it possible that this is occuring during 1/4 mile racing at other RPM points in other gears. I say this because I ran my fastest time with my OD on. Wierd. You guys act like there is absolutely no way to make it downshift. Yes, there is. With your hand. I downshift almost everday to help jumping into traffic and my tranny is still moving along.
05-13-2004, 07:44 PM
#18
From what the "more knowing" SR members say here downshifting manually is bad for the tranny. If you downshift from 3rd or 4th to 1st don't you have to go through all the other gears first? I guess it's different than if the TCM does it, the TCM just goes straight to 1st without going 3>2>1. Maybe not.
05-13-2004, 07:56 PM
#20
Senior Member
Join Date: Apr 2004
Posts: 723
i have a dead spot when accelerating from a rolling stop. the car will kinda rev to 2 grand and then go. i don't know if it's because of my KS or the tranny...and i don't know how it can be the KS since i bypassed it. wierd stuff with these cars.
05-14-2004, 09:16 AM
#23
Originally Posted by Big D
From what the "more knowing" SR members say here downshifting manually is bad for the tranny. If you downshift from 3rd or 4th to 1st don't you have to go through all the other gears first? I guess it's different than if the TCM does it, the TCM just goes straight to 1st without going 3>2>1. Maybe not.
05-14-2004, 10:02 AM
#24
If Im slowing down and Maxeene decides she wants to chill in 3rd or 4th, I simply tap the throttle a few times. This usaully does the trick for me although most of the times she'll go into second. She's so scarred of 1st for some reason.
And to the comment on manual shifting. Not that it matters, but I personally have been doing the manual shift things since about 50k miles. 150k miles later and I've no problems.
And to the comment on manual shifting. Not that it matters, but I personally have been doing the manual shift things since about 50k miles. 150k miles later and I've no problems.
05-14-2004, 12:31 PM
#26
No Prob. Just speaking my piece, but please keep in mind, that even when I do shift, Im
1. Not Redlining up the RPM band on every shift
2. Am at a point now where I know when to up and down shift, so the tranny isn't slamming into the next gear. Now that sort of shifting I can see as being detrimental to tranny life…..although sometimes the automatic will do the same thing when let it shift on it's own. But that’s Usually when your doing some hectic stop and go at higher speeds.
My 2 cents….again.
Have a good weekend everybody!
Capitone
1. Not Redlining up the RPM band on every shift
2. Am at a point now where I know when to up and down shift, so the tranny isn't slamming into the next gear. Now that sort of shifting I can see as being detrimental to tranny life…..although sometimes the automatic will do the same thing when let it shift on it's own. But that’s Usually when your doing some hectic stop and go at higher speeds.
My 2 cents….again.
Have a good weekend everybody!
Capitone
10-11-2004, 01:14 PM
#29
Originally Posted by max'dout06
i noticed in an earlier post someone said it's because of the longer shifts - would a vb mod help fix the problem????
Eventhough I have only had my VB in for 2 days, this is the first thing I noticed when I took her for a test drive. The damn 3rd gear crap is still present. I guess it's just something we'll just have to live with 
Lata,
drew
10-11-2004, 01:53 PM
#30
If you simply anticipate a need to accelerate quickly you can turn off the O/D and be in third. Or you can grab the gear selector and toss it in second or first. I don't consider this to be the downfall of our trannies. Its downfall is the open diff., extremely tall first gear, and its stutter at 3K.
10-11-2004, 05:07 PM
#31
if your complaing about your auto tranny maybe you should have bought a 5 speed.
i drive a stock max about once a week and it always downshifts fine if i ever step on it.
or just use your hand.!! wakkwakwakwakaka
i drive a stock max about once a week and it always downshifts fine if i ever step on it.
or just use your hand.!! wakkwakwakwakaka
10-12-2004, 05:12 AM
#33
Pizda Boy
Join Date: May 2003
Posts: 2,794
Originally Posted by Torgus
if your complaing about your auto tranny maybe you should have bought a 5 speed.
i drive a stock max about once a week and it always downshifts fine if i ever step on it.
or just use your hand.!! wakkwakwakwakaka
i drive a stock max about once a week and it always downshifts fine if i ever step on it.
or just use your hand.!! wakkwakwakwakaka
back on topic:
once you keep it in O/D and drive in 3rd it is fine... but most of the time my o/d is off around the city...
10-12-2004, 12:21 PM
#38
wow, brought up from the graveyard...well i tried doing some research and the downshifts r controlled by the solenoid pack(as well as other shifts)...some one on the org replaced it and he said downshift lag went away. I drive a 3rd gen auto and absolutely no lag at all.I was quoted from the dealer $385 for the pack, but org members here have gotten it for $140 and i dont know how. I dont know if the vb mad will help. Now for the slight pause in acceleration, it is not my KS because my tires spin to 3rpms from a stop then pause a little, i guess to get back traction.Makes me want the 5speed soo much more
10-12-2004, 12:40 PM
#39
Senior Member
Join Date: Apr 2004
Posts: 723
i too have this problem with it not downshifting when i accelerate from a rolling stop. would a sticking valve body be causing this? i also noticed that Stillen or JWT sells a modified TCM, would this help any? it's just getting so annoying when i go to accelerate and it revs before it decides to move.