Why Did My Z, Keep Revving? Video.

semtex · 02-05-2010, 10:04 AM

Hey TW, instead of completely deleting your video on YouTube, I'm wondering if it'd be a good idea to re-post it under the heading 'Synchro Rev Match malfunction' or something like that. My thinking is that it could serve as a future reference for anyone who suspects they have a problem with their SRM. Your vid could be an example of a symptom of SRM going awry. Just a thought.

Modshack · 02-05-2010, 10:57 AM

Quote:

Originally Posted by semtex

why don't you just turn SRM off and see what happens? So does he ever try it? Nope. But personally, I found his attitude downright frustrating and, in light of the confirmation that it was SRM all along, foolish and anything but constructive.

Only 8 suggestions that the OP push the button. We're all glad that this is fixed, but a simple act on the OP's part early in this thread would have been far more constructive for us all.

Quote:

Originally Posted by semtex

To be honest, I'm quite surprised that we haven't seen more cases of SRM malfunctioning sooner.

Based on some of the responses in this thread, there appear to be a fair percentage that are not operating as designed. It should NOT rev in neutral as many report. The OP's final diagnosis indicates the potential sensor problem....

ChrisSlicks · 02-05-2010, 11:09 AM

Quote:

Originally Posted by Modshack

It should NOT rev in neutral as many report.

I beg to differ. The neutral rev is by design, it is designed this way so that the ECU can hit the target RPM's on a quick shift. If the ECU only revved when the shift hit the target gate it would be too late.

Modshack · 02-05-2010, 11:32 AM

Quote:

Originally Posted by ChrisSlicks

I beg to differ. The neutral rev is by design, it is designed this way so that the ECU can hit the target RPM's on a quick shift. If the ECU only revved when the shift hit the target gate it would be too late.

?? This is probably a matter of semantics here, but mine will not rev until the gate sensor is triggered. This is never too late for a matched engagement. Maybe you're shifting at the speed of light...I dunno. Wiggling your stick around in neutral should not trigger a REV as a few have reported and as was ultimately found to be a fault in the OP's car..

Maybe you need to do the Neutral Learning procedure?

3.PERFORM M/T NEUTRAL POSITION LEARNING
Without CONSULT-III
NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the learning mode when a clutch interlock switch circuit has a malfunction.
1. Check that there is no sticking when shifting shift lever to the neutral position.
2. Turn ignition switch ON and wait 5 seconds.
3. Within 5 seconds repeat the following operation 3 times. Fully depress and fully release clutch pedal while
pressing and holding S-MODE switch.
4. Wait 3 seconds while S-MODE switch is released.
5. Wait 5 seconds while pressing S-MODE switch.
6. Wait 3 seconds while S-MODE switch is released.
7. Within 5 seconds repeat the following operation 5 times. Fully depress and fully release clutch pedal while
pressing and holding S-MODE switch.
ECM starts M/T Neutral Position Learning.
NOTE:
Never touch shift lever. Otherwise learning may not complete normally

ChrisSlicks · 02-05-2010, 11:49 AM

Quote:

Originally Posted by Modshack

?? This is probably a matter of semantics here, but mine will not rev until the gate sensor is triggered. This is never too late for a matched engagement. Maybe you're shifting at the speed of light...I dunno. Wiggling your stick around in neutral should not trigger a REV as a few have reported and as was ultimately found to be a fault in the OP's car..

We'll just have to agree to disagree on this one for now.

The service manual doesn't have any description of proper SRM operation. It does however describe a neutral position learning mode.

ChrisSlicks · 02-05-2010, 11:50 AM

Quote:

Originally Posted by Modshack

Maybe you need to do the Neutral Learning procedure?

LOL, actually I think you need to perform the neutral position learning mode because mine works and yours doesn't!

j.arnaldo · 02-05-2010, 11:52 AM

Changing subjects a bit...What a NIGHTMARE Toyota is going thru' right now! Nissan, Honda, Mazda, Mitsu', Subaru and Suzuki are gonna capture a good chunk off of their buyers! BTW, Nissan just positioned itself in 3rd position in auto sales down here!

kannibul · 02-05-2010, 11:58 AM

Quote:

Originally Posted by Modshack

Try re-booting the car (battery disconnect for a few minutes)

I'd recommend taking it to the dealer before anything. That way it's documented. If resetting the ECU fixes it, then so be it.

Things like that are no joke. Cars should not fail.

Modshack · 02-05-2010, 12:29 PM

Quote:

Originally Posted by ChrisSlicks

LOL, actually I think you need to perform the neutral position learning mode because mine works and yours doesn't!

LOL...But I don't want mine working the way yours does!....

TamZ · 02-05-2010, 12:40 PM

Quote:

Originally Posted by m4a1mustang

Well most people don't know a thing about cars... in a panic situation they just stand on the brakes.

This is exactly what happened to me when a semi-truck forgot I was in front of him at a stop light and he just hammered it and ran right into the back of me..He didn't even know he hit me (how he didn't know, I will never understand!)..I was in my little Nissan 240sx and what did I do? Slammed on my brakes. As if I was going to stop the semi-truck who didn't even know I was down there in front of him. He was shifting gears, had no idea I was there and I was hitting the brakes?!? I should have hit the throttle. I was young and it scared the $#@$ out of me. Totaled my car. I'm lucky to be alive, he pushed me for a couple hundred feet before he realized he was hooked on to the back of my hatchback! (he only noticed because my car, being stuck (his big bumper sort of rolled up on my car I guess?) started to turn sideways and he slammed me into a guardrail. What I remember most about that accident is when he sheared off my radio antenae all I could hear was the static!

ChrisSlicks · 02-05-2010, 12:48 PM

Quote:

Originally Posted by Modshack

LOL...But I don't want mine working the way yours does!....

Just wondering if perhaps your sensor could have got knocked out of alignment when you installed your short shifter kit? Just a thought ...

Obviously if you like it the way it is then there is no reason to change.

Modshack · 02-05-2010, 01:03 PM

Quote:

Originally Posted by ChrisSlicks

Just wondering if perhaps your sensor could have got knocked out of alignment when you installed your short shifter kit? Just a thought ...

Obviously if you like it the way it is then there is no reason to change.

No shift kit....It's a Virgin. She only Revs when I want her to....

ChrisSlicks · 02-05-2010, 01:14 PM

Quote:

Originally Posted by Modshack

No shift kit....It's a Virgin

Shift knob?

Modshack · 02-05-2010, 01:16 PM

Quote:

Originally Posted by ChrisSlicks

Shift knob?

Yup. SRM action has not changed since new (with the stock knob)..

semtex · 02-05-2010, 01:50 PM

My SRM works just like Modshack's. It doesn't blip until I push it into a lower gear. And that is exactly how I want it. But you know, this does explain something to me. Sometimes I read car mag writeups and they talk about how cool it is to make the throttle blip while they're waiting at a light by moving the shifter around in neutral. I always wondered what they were smoking and just chalked it up to ignorant journalists talking out of their proverbial a$$e$. Well now I know differently. So here's what I don't get. Say you're in 4th gear, you move the shifter into neutral and it immediately blips. Well, how does it know your intent is to downshift to 3rd rather than upshift to 5th? This is why I say my SRM is working exactly the way I want it. I don't want it blipping until I've moved into the gate for a lower gear.

02-05-2010, 10:04 AM	#106 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	Hey TW, instead of completely deleting your video on YouTube, I'm wondering if it'd be a good idea to re-post it under the heading 'Synchro Rev Match malfunction' or something like that. My thinking is that it could serve as a future reference for anyone who suspects they have a problem with their SRM. Your vid could be an example of a symptom of SRM going awry. Just a thought. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

02-05-2010, 01:50 PM	#120 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	My SRM works just like Modshack's. It doesn't blip until I push it into a lower gear. And that is exactly how I want it. But you know, this does explain something to me. Sometimes I read car mag writeups and they talk about how cool it is to make the throttle blip while they're waiting at a light by moving the shifter around in neutral. I always wondered what they were smoking and just chalked it up to ignorant journalists talking out of their proverbial a$$e$. Well now I know differently. So here's what I don't get. Say you're in 4th gear, you move the shifter into neutral and it immediately blips. Well, how does it know your intent is to downshift to 3rd rather than upshift to 5th? This is why I say my SRM is working exactly the way I want it. I don't want it blipping until I've moved into the gate for a lower gear. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

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02-05-2010, 11:52 AM	#112 (permalink)
j.arnaldo Banned Join Date: Oct 2009 Location: Puerto Rico Posts: 937 Drives: Nissan 350Z, 2004 Rep Power: 0	Changing subjects a bit...What a NIGHTMARE Toyota is going thru' right now! Nissan, Honda, Mazda, Mitsu', Subaru and Suzuki are gonna capture a good chunk off of their buyers! BTW, Nissan just positioned itself in 3rd position in auto sales down here!