Skip Shift - ZR-1 Net Registry Forums

vettn71 · 10-02-2011

I'm about to have my 1990 Z undergo the PV (Performance Verification) at the NCRS Texas Regional inthis month. Part of the procedure is to check the operation of the skip-shift feature. I had a Haibeck chip in it, which I've removed for judging, so fans and all will finction correctly. It doe snot appear, though that the skip-dhift is funtioning. I had the car in for service at a local Corvette shop here in Dallas and asked them to check to see if there was a bypass harness (skip-shift defeat cable) and they said there was not. Either they did not check it or something else is going on.

Two questions:
1. Where would the cable be located?
2. Is there anything else that would disable this function?

Thanks in advance

Jim

A26B · 10-02-2011

See if the stock wiring connector is plugged in on the side of the transmission.

Kevin · 10-02-2011

stupid question, is it the stock chip?

lbszr · 10-02-2011

Not 100%, but I think the skip shift light on the instrument will light up when it is trying to skip shift whether the plug is plugged into the transmission or not. So if it's not illuminating, it has been programmed out, or broke. Mines been programmed out, so I can't verify this, but if I'm remembering right, mine did light up when the stock chip was in, also with it unplugged from the trans.

vettn71 · 10-02-2011

It does have the stock chip. It did have a Haibeck chip in it, which made the car run much better, but it turns the fans on at a lower temperature, along with some other things

Jim

Kevin · 10-02-2011

put the haibeck chip back in and fake it?

soslow · 10-11-2011

I have a stock 1990 zr-1. I want to disconnect the skip shift feature. I know that if i unplug the wire to the tranny, it will accomplish this....however, what is the purpose of the mentioned skip shift cable and does it do anything special? Any suggestions as to use the special cable or not. Please help.

thanks, soslow (mike)

Mystic ZR-1 · 10-11-2011

While you're at it, make sure your rear hatch goes all the way up by itself, they'll gig you for this.
I've been told you can use aftermarket/replacement "rams" for the PV, check your own sources 1st on this... The stock ones, even new usually don't push it all the way open, the aftermarket ones almost rip it off the car solving the problem! I've had 2 new C-4s and neither one opened all the way by themselves even when new, and of course my current Z doesn't go all the way up either.
Also spray a little WD40 on the latches of the storage bins behind the seats, they like to see them latch when "dropped" from about 6-8 inches, pushing them down to latch is a no no.
Be very familiar on how to operate all of the controls, stereo, AC etc. Good luck with the CD player and seat bladders...

gbrtng · 10-11-2011

Quote:

Originally Posted by soslow

I have a stock 1990 zr-1. I want to disconnect the skip shift feature. I know that if i unplug the wire to the tranny, it will accomplish this....however, what is the purpose of the mentioned skip shift cable and does it do anything special? Any suggestions as to use the special cable or not. Please help.

thanks, soslow (mike)

There is no cable - just a 2-wire connector that provides power to the solenoid inside the ZF-6.

Kevin · 10-11-2011

Quote:

Originally Posted by Mystic ZR-1

While you're at it, make sure your rear hatch goes all the way up by itself, they'll gig you for this.
I've been told you can use aftermarket/replacement "rams" for the PV, check your own sources 1st on this... The stock ones, even new usually don't push it all the way open, the aftermarket ones almost rip it off the car solving the problem! I've had 2 new C-4s and neither one opened all the way by themselves even when new, and of course my current Z doesn't go all the way up either.
Also spray a little WD40 on the latches of the storage bins behind the seats, they like to see them latch when "dropped" from about 6-8 inches, pushing them down to latch is a no no.
Be very familiar on how to operate all of the controls, stereo, AC etc. Good luck with the CD player and seat bladders...

my hatch will go all the way up on it's own depending on weather...but the storage units always required a little help...thank god I got out of the ncrs crap years ago

10-02-2011	#1
vettn71 Join Date: Oct 2008 Location: Colleyville, TX Posts: 272	Skip Shift I'm about to have my 1990 Z undergo the PV (Performance Verification) at the NCRS Texas Regional inthis month. Part of the procedure is to check the operation of the skip-shift feature. I had a Haibeck chip in it, which I've removed for judging, so fans and all will finction correctly. It doe snot appear, though that the skip-dhift is funtioning. I had the car in for service at a local Corvette shop here in Dallas and asked them to check to see if there was a bypass harness (skip-shift defeat cable) and they said there was not. Either they did not check it or something else is going on. Two questions: 1. Where would the cable be located? 2. Is there anything else that would disable this function? Thanks in advance Jim

10-02-2011	#2
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,394	Re: Skip Shift See if the stock wiring connector is plugged in on the side of the transmission. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.

10-02-2011	#3
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,632	Re: Skip Shift stupid question, is it the stock chip? __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

10-02-2011	#4
lbszr Join Date: Nov 2006 Location: dayton,ohio Posts: 425	Re: Skip Shift Not 100%, but I think the skip shift light on the instrument will light up when it is trying to skip shift whether the plug is plugged into the transmission or not. So if it's not illuminating, it has been programmed out, or broke. Mines been programmed out, so I can't verify this, but if I'm remembering right, mine did light up when the stock chip was in, also with it unplugged from the trans. __________________ [FONT=Comic Sans MS][COLOR=red]"I wanna go fast!!"[/COLOR][/FONT] [FONT=Comic Sans MS][COLOR=#ff0000]-- Ricky Bobby[/COLOR][/FONT] Last edited by lbszr; 10-02-2011 at 02:04 PM.

10-02-2011	#5
vettn71 Join Date: Oct 2008 Location: Colleyville, TX Posts: 272	Re: Skip Shift It does have the stock chip. It did have a Haibeck chip in it, which made the car run much better, but it turns the fans on at a lower temperature, along with some other things Jim

10-02-2011	#6
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,632	Re: Skip Shift put the haibeck chip back in and fake it? __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

10-11-2011	#7
soslow Join Date: Sep 2004 Location: SELDEN, NEW YORK Posts: 26	Re: Skip Shift I have a stock 1990 zr-1. I want to disconnect the skip shift feature. I know that if i unplug the wire to the tranny, it will accomplish this....however, what is the purpose of the mentioned skip shift cable and does it do anything special? Any suggestions as to use the special cable or not. Please help. thanks, soslow (mike)

10-11-2011	#8
Mystic ZR-1 Join Date: Jan 2010 Location: Mystic CT Posts: 2,633	Re: Skip Shift While you're at it, make sure your rear hatch goes all the way up by itself, they'll gig you for this. I've been told you can use aftermarket/replacement "rams" for the PV, check your own sources 1st on this... The stock ones, even new usually don't push it all the way open, the aftermarket ones almost rip it off the car solving the problem! I've had 2 new C-4s and neither one opened all the way by themselves even when new, and of course my current Z doesn't go all the way up either. Also spray a little WD40 on the latches of the storage bins behind the seats, they like to see them latch when "dropped" from about 6-8 inches, pushing them down to latch is a no no. Be very familiar on how to operate all of the controls, stereo, AC etc. Good luck with the CD player and seat bladders...