SES light - ZR-1 Net Registry Forums

Jim Nolan · 04-20-2012

I had my '92 modded a couple of years ago by a known tuner but I wasn't real happy with some of the results, (rough idle and backfire) so I had Haibeck retune an extra e-prom I had for me to see if I got different results. The mods were;

Ported heads, injector housings and plenum
SW headers no cats
Corsa exaust
3:92 gears
Reset cams
and I added
K& N filter
Relocated temp sensor

The Idle is smooth and the backfire is gone but with a hard shift above 6k I get a momentary SES light. Using Gordan's kit I could not find any stored codes, Marc set fuel scheduling for 410/420hp. Any ideas?

Kevin · 04-20-2012

vac leak

tomtom72 · 04-20-2012

It could be you are running out of vacuum and it's setting a DTC 61 intermittently ?? You said hard run to 6+k rpms, and that would be where the manifold vac drops almost to zero and in theory our vacuum pump is supposed to pick up any shortage of vacuum in the system to keep the 2* actuators pulling on the 2* linkage.

Not to be a wise guy, did you use the Gordon jumper for the CCM? I think that's where the history codes and intermittent codes are stored....I think!

Tom

Jim Nolan · 04-20-2012

I tried them all, ECM, CCM etc; nothing. If it is a vacuum leak I wonder why it didn't show up with the other e-prom? But, I'll check all the vacuum lines.

GOLDCYLON · 04-20-2012

My guess would be a lazy secondary vaccumm actuator under the plenum. One of the pair

XfireZ51 · 04-20-2012

Quote:

Originally Posted by Jim Nolan

I tried them all, ECM, CCM etc; nothing. If it is a vacuum leak I wonder why it didn't show up with the other e-prom? But, I'll check all the vacuum lines.

Could be running a bit lean at top end depending on what Marc did with fuel. See if you can datalog while you do a run.

Paul Workman · 04-24-2012

Quote:

Originally Posted by XfireZ51

Could be running a bit lean at top end depending on what Marc did with fuel. See if you can datalog while you do a run.

Ummm-yeah. Had that thought too when I read 410-420. Mine was initially set by Marc for ≈ 450 hp before I ported the heads. I had no SES. Logically speaking, it would seem (to me too) that one possiblilty might be a lean condition???

Dom, we're starting to think alike...AND DON'T THINK I'M NOT WORRIED!!

p.

04-20-2012	#1
Jim Nolan Join Date: Jan 2007 Location: Florida Posts: 241	SES light I had my '92 modded a couple of years ago by a known tuner but I wasn't real happy with some of the results, (rough idle and backfire) so I had Haibeck retune an extra e-prom I had for me to see if I got different results. The mods were; Ported heads, injector housings and plenum SW headers no cats Corsa exaust 3:92 gears Reset cams and I added K& N filter Relocated temp sensor The Idle is smooth and the backfire is gone but with a hard shift above 6k I get a momentary SES light. Using Gordan's kit I could not find any stored codes, Marc set fuel scheduling for 410/420hp. Any ideas?

04-20-2012	#2
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,632	Re: SES light vac leak __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

04-20-2012	#3
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: SES light It could be you are running out of vacuum and it's setting a DTC 61 intermittently ?? You said hard run to 6+k rpms, and that would be where the manifold vac drops almost to zero and in theory our vacuum pump is supposed to pick up any shortage of vacuum in the system to keep the 2* actuators pulling on the 2* linkage. Not to be a wise guy, did you use the Gordon jumper for the CCM? I think that's where the history codes and intermittent codes are stored....I think! Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

04-20-2012	#4
Jim Nolan Join Date: Jan 2007 Location: Florida Posts: 241	Re: SES light I tried them all, ECM, CCM etc; nothing. If it is a vacuum leak I wonder why it didn't show up with the other e-prom? But, I'll check all the vacuum lines.

04-20-2012	#5
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: SES light My guess would be a lazy secondary vaccumm actuator under the plenum. One of the pair __________________ 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