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#1 |
Join Date: Jun 2005
Location: Lancashire England
Posts: 6
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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
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Using an LT5 1990 fitted to an Ultima GTR and Porsche Box |
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#2 |
![]() Join Date: Jan 2004
Location: Alex VA
Posts: 1,087
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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.
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95 390 LPE ZR1 (505 rwhp) LSV = Lingenfelter Super Vette Twin Turbo 2003 Z06 (800 RWHP) |
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#3 |
Join Date: Jun 2005
Location: Lancashire England
Posts: 6
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Thanks for that
Where would I get the Memcal re-programed
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Using an LT5 1990 fitted to an Ultima GTR and Porsche Box |
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#4 |
![]() Join Date: Aug 2005
Location: NY
Posts: 143
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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
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Mike 427 cu in LT5 [URL="http://zr1mk.weebly.com"]http://zr1mk.weebly.com[/URL] |
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#5 |
![]() ![]() Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
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Need pics stat.
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It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
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#6 | |
![]() Join Date: May 2005
Location: Nichols, FL
Posts: 615
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tpepmeie@yahoo.com Tyler
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55 Polo White (Project) 61 Jewel Blue (Sold to buy above) 66 Nassau Blue 68 Torch Red 88 ZR1 Blue 90 ZR1 White |
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