ZR-1 Net Registry Forums  

Go Back   ZR-1 Net Registry Forums > C4 ZR-1 > C4 ZR-1 Technical Postings

Reply
 
Thread Tools Display Modes
Old 06-12-2013   #1
oricale
 
Join Date: Oct 2011
Location: STAFFORD VA,
Posts: 576
Question Alright!, new car and first troubleshooting!!!!

So I have the car and I want to get some opinions on a issue.

Key off Runs fine no issues....

Key on runs fine until I hammer it and she hesitates (all gears)

PO said he used to have a burned chip in it and now it's stock. Has a B&B exhaust and I think that's it.

The hesitation is not extreme where the car is falling apart its just stuttering from 3800 up.

__________________
[B][I][COLOR=red]1990 ZR1[/COLOR][COLOR=black] [U]#00077 [COLOR=red]RED[/COLOR]/[COLOR=red]RED[/COLOR] (10Y022 PEP CAR)
[/U][/COLOR][/I][/B][B][I][COLOR=red]1991 ZR1[/COLOR][COLOR=black] [U]#00517 ("Irene")[COLOR=red]WHITE[/COLOR]/[COLOR=red]RED-SOLD:cry:[/COLOR] [B][/B]
[/U][/COLOR][/I][/B][B][I][COLOR=red]1992 ZR1[/COLOR][COLOR=black] [U]#00445("The Revenant")[COLOR=red][COLOR="Black"]BLACK [/COLOR][/COLOR]/[COLOR=red]RED(2016 T.O.D!) [/COLOR] [/U][/COLOR][/I][/B]
[B][I][COLOR=red]2009 [COLOR=red]Z06!![COLOR=black]BLK/BLK rare Linen interior[/COLOR] 707HP!![/COLOR] [/COLOR][/I][/B]
[B][I][COLOR=red]2006[/COLOR] BLK/BLK Z51 (Just SICK FAST!)SOLD)[/I][/B]
[B][I]1996 BLK/BLK LT4 Grnsprt(sold...Twice!)[/I][/B]
[B][I]1991 RED/REDL98(Fell off the shipping truck:([/I][/B]
[B][I]1980 BLK/RED L82(Sold)[/I][/B]
[B][I][B][I]1990[/I][/B] RED/BLK(sold.....In Japan)[/I][/B]
[I][COLOR=black][B][I]2006[/I][/B][/COLOR][/I] [COLOR=red]Mustang GT[/COLOR] ([B][I]mach 1[/I][/B])[B](sold)[/B]
[COLOR=black][B][I]1969[/I][/B][/COLOR] [COLOR=red]Mach[/COLOR] [B][I]1(sold in Japan)[/I][/B]
[COLOR=black][B][I]1969[/I][/B][/COLOR] [COLOR=red]Mach[/COLOR] [B][I]1#2(sold)[/I][/B]

[B][I]WAZOO Member...[/I][/B]

[url]www.evolution-motorsport.com[/url]

facebook/evolutionmotorsportengineering

Your Local [url]www.Amsoil.com[/url] dealer/user..

*Victory Loves Preparation*
oricale is offline   Reply With Quote
Old 06-12-2013   #2
GOLDCYLON
 
GOLDCYLON's Avatar
 
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
Default Re: Alright!, new car and first troubleshooting!!!!

Quote:
Originally Posted by oricale View Post
So I have the car and I want to get some opinions on a issue.

Key off Runs fine no issues....

Key on runs fine until I hammer it and she hesitates (all gears)

PO said he used to have a burned chip in it and now it's stock. Has a B&B exhaust and I think that's it.

The hesitation is not extreme where the car is falling apart its just stuttering from 3800 up.

Injectors would be my WAG, I would do a fuel pressure check as well maybe as simple as a fuel filter
__________________
GOLDCYLON - 91 ZR-1 #2014
GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's)

GOLDCYLON - 11 CTS-V


Arizona State Director




91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat

90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat

11 RED/GREY CTS-V
GOLDCYLON is offline   Reply With Quote
Old 06-12-2013   #3
Coupe89
 
Join Date: Aug 2009
Location: Livermore, Ca
Posts: 204
Default Re: Alright!, new car and first troubleshooting!!!!

Are you getting a SES light when passed the 3K RPM mark?
If so, you may have a a vacuum leek in the secondary system.
__________________
1990 ZR-1 #642
Coupe89 is offline   Reply With Quote
Old 06-12-2013   #4
scottfab
 
scottfab's Avatar
 
Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
Default Re: Alright!, new car and first troubleshooting!!!!

Good job of listing the symptoms.
Just based on those I'd say you have one of the two secondary actuators sticking a bit. Common if you don't exercise at WOT much.
One way to isolate is to do many WOTs in a row. If the stumble does not repeat every time after that then that's it.

On the other hand if you go WOT and hold it for >10sec and you feel the torque flatten out then it's your secondary vacuum pump or a leak. That is you begin the WOT and all is strong up past 5000rmp then after a bit you feel the power drop off.
__________________
Scott


Vett owner since 1979._It's about the car and the people
scottfab is offline   Reply With Quote
Old 06-12-2013   #5
Schrade
 
Join Date: Dec 2012
Location: NC
Posts: 1,786
Default Re: Alright!, new car and first troubleshooting!!!!

Check H History DTC...

Air filter? K&N? Too much oil???

Did your wife see exhaust color with hammer down?

Put a compression guage on it and check the squeeze? (static compression too / leakdown time)
__________________
I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads...

( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b]

Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc...

1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3"

[IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]
Schrade is offline   Reply With Quote
Old 06-12-2013   #6
ZZZZZR1
Banned
BANNED
 
Join Date: Oct 2006
Location: MD
Posts: 3,690
Default Re: Alright!, new car and first troubleshooting!!!!

Quote:
Originally Posted by GOLDCYLON View Post
Injectors would be my WAG, I would do a fuel pressure check as well maybe as simple as a fuel filter
I agree. Typical 20yr old issues

Injectors. Coil packs. Spark plug wires. Spark plugs. Fuel pumps



David
ZZZZZR1 is offline   Reply With Quote
Old 06-12-2013   #7
oricale
 
Join Date: Oct 2011
Location: STAFFORD VA,
Posts: 576
Default Re: Alright!, new car and first troubleshooting!!!!

Thank you for the responses!!.

The PO said he changed all the coils,wires and plugs. I actually have the stock ones he pulled out. HOWEVER.. I did not get secondary injectors!.

No lights light up, it just feels as though it push bad gas .


also: Opinions please

I am debating replacing the stereo in the car...With the history and provenance that this car goes with should I stay stock or install???

finally:

I asked a few other poeple....My throttle body has a STAMP OF AN RP # AND A SERIAL # on it.

Any ideas??
__________________
[B][I][COLOR=red]1990 ZR1[/COLOR][COLOR=black] [U]#00077 [COLOR=red]RED[/COLOR]/[COLOR=red]RED[/COLOR] (10Y022 PEP CAR)
[/U][/COLOR][/I][/B][B][I][COLOR=red]1991 ZR1[/COLOR][COLOR=black] [U]#00517 ("Irene")[COLOR=red]WHITE[/COLOR]/[COLOR=red]RED-SOLD:cry:[/COLOR] [B][/B]
[/U][/COLOR][/I][/B][B][I][COLOR=red]1992 ZR1[/COLOR][COLOR=black] [U]#00445("The Revenant")[COLOR=red][COLOR="Black"]BLACK [/COLOR][/COLOR]/[COLOR=red]RED(2016 T.O.D!) [/COLOR] [/U][/COLOR][/I][/B]
[B][I][COLOR=red]2009 [COLOR=red]Z06!![COLOR=black]BLK/BLK rare Linen interior[/COLOR] 707HP!![/COLOR] [/COLOR][/I][/B]
[B][I][COLOR=red]2006[/COLOR] BLK/BLK Z51 (Just SICK FAST!)SOLD)[/I][/B]
[B][I]1996 BLK/BLK LT4 Grnsprt(sold...Twice!)[/I][/B]
[B][I]1991 RED/REDL98(Fell off the shipping truck:([/I][/B]
[B][I]1980 BLK/RED L82(Sold)[/I][/B]
[B][I][B][I]1990[/I][/B] RED/BLK(sold.....In Japan)[/I][/B]
[I][COLOR=black][B][I]2006[/I][/B][/COLOR][/I] [COLOR=red]Mustang GT[/COLOR] ([B][I]mach 1[/I][/B])[B](sold)[/B]
[COLOR=black][B][I]1969[/I][/B][/COLOR] [COLOR=red]Mach[/COLOR] [B][I]1(sold in Japan)[/I][/B]
[COLOR=black][B][I]1969[/I][/B][/COLOR] [COLOR=red]Mach[/COLOR] [B][I]1#2(sold)[/I][/B]

[B][I]WAZOO Member...[/I][/B]

[url]www.evolution-motorsport.com[/url]

facebook/evolutionmotorsportengineering

Your Local [url]www.Amsoil.com[/url] dealer/user..

*Victory Loves Preparation*
oricale is offline   Reply With Quote
Old 06-12-2013   #8
GOLDCYLON
 
GOLDCYLON's Avatar
 
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
Default Re: Alright!, new car and first troubleshooting!!!!

Quote:
Originally Posted by oricale View Post
Thank you for the responses!!.

The PO said he changed all the coils,wires and plugs. I actually have the stock ones he pulled out. HOWEVER.. I did not get secondary injectors!.

No lights light up, it just feels as though it push bad gas .


also: Opinions please

I am debating replacing the stereo in the car...With the history and provenance that this car goes with should I stay stock or install???

finally:

I asked a few other poeple....My throttle body has a STAMP OF AN RP # AND A SERIAL # on it.

Any ideas??

Yep the secondary injectors.... The fact that you mentioned no SES light No codes, fine at startup however struggles all the way through the power band with key on is a dead give away.

I suggest replacing the Radio unless your considering NCRS.

Take a pic of that stamp and general location
__________________
GOLDCYLON - 91 ZR-1 #2014
GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's)

GOLDCYLON - 11 CTS-V


Arizona State Director




91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat

90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat

11 RED/GREY CTS-V
GOLDCYLON is offline   Reply With Quote
Old 06-12-2013   #9
SteelBlueZR1
 
Join Date: Aug 2011
Location: Evergreen, Co.
Posts: 346
Default Re: Alright!, new car and first troubleshooting!!!!

Don't forget to check the MAP hose and replace it with new oem unit from Jerry's if it is not original hard line that won't collapse at high rpm... Also check secondary operation with plenum on using the procedure here: http://www.zr1specialist.com/HAT%20W...0Operation.pdf
Finally, don't discount the secondary selonoid switch failing as the cause. My car had similar symptoms and a new selonoid solved the issue... Good luck with your new Z!
__________________
Bert Rankin
1991 ZR1 Steel Blue / Steel Blue
#1029
Haibeck chip, slotted rotors, camber brace, C-beam plates, OBX exhaust, Nitto NT555 tires
[SIGPIC][/SIGPIC]
SteelBlueZR1 is offline   Reply With Quote
Old 06-12-2013   #10
Blue Flame Restorations
 
Blue Flame Restorations's Avatar
 
Join Date: Feb 2010
Location: Pendleton, IN
Posts: 3,904
Default Re: Alright!, new car and first troubleshooting!!!!

Sounds like since you have an early car that "may" have been used for evaluation PEP, I'd probably leave the secondaries intact and leave the car stock, especially since you already have a nice Z to flog.

Eric can probably help you on the stamped codes on your TB.

Again, congrats on the nice find!
__________________
1988 KOH Prototype EX5023 sold
1990 ZR-1 #444 Convertible
1990 ZR-1 Black #966
1991 ZR-1 Quazar Blue #296
1957 Duntov SS Project
Blue Flame Restorations is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:42 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright ZR-1 Net Registry 2020