No Secondry Power - ZR-1 Net Registry Forums

jdodds1111 · 07-23-2005

Hi All
I've fitted an LT5 to an Ultima GTR it uses a Porsche G50 gearbox. The cars running well but the second thottles are not coming in.
The engine is 1990 and uses a seperate ESC module for the Knock sensor.
The power key has been earthed out.
There is no speed sensor as I can not fit one to the Porsche box so I get the assosiated trouble code.
I sometimes get a cam sensor code.
I don't get any vacuum or second injector codes so I think everthing is OK.
The engine pulls smoothly with no hesitation.
There are no indications of lean mixture.
The engine revs up to 7000rpm ok.

Can you help?

John

rkreigh · 07-26-2005

what a cool project. I would contact Marc Haibec. if the ECM has any fault codes, often the secondaries are disabled. on a car that light, you really don't need them. you can revise the programming in the memcal, and just eliiminate them altogether and not hassle with them. on a car that light the loss of low end torq might even help you hook a bit better with a nice pay back in more top end.

the car will drive nicely when calibrated to run without them. I'm considering ditching them myself as there is a fair gain without them in flow and parts left out don't weigh or break.

the factory manual should help you trouble shoot why they aren't working and know what is required.

jdodds1111 · 07-30-2005

Thanks for that

Where would I get the Memcal re-programed

ZR1 MK · 08-04-2005

The info dont seem correct. You will get code 61 if the secondary system has a problem and will limit rpm.
I agree with Ron regarding the elimination of the secodary system.
Contact
Mike Ebert (mrcrowley)
www.acsvette.com
http://www.zr1netregistry.com/forum/...read.php?t=653
Marc Haibeck
www.zr1specialist.com

Kevin · 08-04-2005

Need pics stat.

Tyler Townsley · 08-05-2005

Quote:

Originally Posted by jdodds1111

Thanks for that

Where would I get the Memcal re-programed

I would recommend Tod Pepmeier as he has the knowledge and skills to add/remove code needed by your setup. Not sure if he has the time as he has a real job too.

tpepmeie@yahoo.com

Tyler

07-23-2005	#1
jdodds1111 Join Date: Jun 2005 Location: Lancashire England Posts: 6	No Secondry Power Hi All I've fitted an LT5 to an Ultima GTR it uses a Porsche G50 gearbox. The cars running well but the second thottles are not coming in. The engine is 1990 and uses a seperate ESC module for the Knock sensor. The power key has been earthed out. There is no speed sensor as I can not fit one to the Porsche box so I get the assosiated trouble code. I sometimes get a cam sensor code. I don't get any vacuum or second injector codes so I think everthing is OK. The engine pulls smoothly with no hesitation. There are no indications of lean mixture. The engine revs up to 7000rpm ok. Can you help? John __________________ Using an LT5 1990 fitted to an Ultima GTR and Porsche Box

07-26-2005	#2
rkreigh Join Date: Jan 2004 Location: Alex VA Posts: 1,087	what a cool project. I would contact Marc Haibec. if the ECM has any fault codes, often the secondaries are disabled. on a car that light, you really don't need them. you can revise the programming in the memcal, and just eliiminate them altogether and not hassle with them. on a car that light the loss of low end torq might even help you hook a bit better with a nice pay back in more top end. the car will drive nicely when calibrated to run without them. I'm considering ditching them myself as there is a fair gain without them in flow and parts left out don't weigh or break. the factory manual should help you trouble shoot why they aren't working and know what is required. __________________ 95 390 LPE ZR1 (505 rwhp) LSV = Lingenfelter Super Vette Twin Turbo 2003 Z06 (800 RWHP)

07-30-2005	#3
jdodds1111 Join Date: Jun 2005 Location: Lancashire England Posts: 6	No Secondary Power Thanks for that Where would I get the Memcal re-programed __________________ Using an LT5 1990 fitted to an Ultima GTR and Porsche Box

08-04-2005	#4
ZR1 MK Join Date: Aug 2005 Location: NY Posts: 143	The info dont seem correct. You will get code 61 if the secondary system has a problem and will limit rpm. I agree with Ron regarding the elimination of the secodary system. Contact Mike Ebert (mrcrowley) www.acsvette.com http://www.zr1netregistry.com/forum/...read.php?t=653 Marc Haibeck www.zr1specialist.com __________________ Mike 427 cu in LT5 [URL="http://zr1mk.weebly.com"]http://zr1mk.weebly.com[/URL]

08-04-2005	#5
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,633	Need pics stat. __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"