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Dies when idling and when accelerating.

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Old Aug 25, 2015 | 06:32 PM
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Default Dies when idling and when accelerating.

Hello,
I'm new to the website. I built a kit car with a 98 LS1 with a Porsche G50 trans mission, painless wiring. The car will idle fine for a while then just dies. When you try to drive it it will run for a little bit some times longer then others then will die. some times if you feather the gas it will stay running. Grateful for any help. It does not have a VSS. Not sure if its possible with the G50. It has a GPS speedo. Thank you for your help
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Old Aug 26, 2015 | 08:11 AM
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Is it throwing any codes? How is the fuel pressure?
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Old Aug 26, 2015 | 09:04 AM
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1964SS Not throwing any codes. I will check the fuel pressure. Thank you for responding. I'll let you know what I find. Thanks
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Old Aug 26, 2015 | 12:32 PM
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Hi nitro what kit car did u build? With the limited information provided it sounds like something is turning on (e fans or alternator) causing a positive wire to ground. I would closely inspect your battery pos. wires all the way to your alternator. I had a grounding issue with a power wire and the damage wasn't all the way through the outer coating. it just had a crease in it, but was enough to ground out. When I had this issue my ls1 would idle fine then just go to die. I would shut it off before it could die. I could feather the gas and keep it running.

Additionally if your e fan is wired backwards when they go to come on, it will also make it die.

Last edited by amfs1950f-1; Aug 26, 2015 at 12:45 PM.
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Old Aug 27, 2015 | 11:08 AM
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Hi Amfs,
Thank you for the Reply. I will check all wiring and report back. I built an IFG Diablo Roadster. I posted a reply last night with a picture but it didn't post said it need to be approved. I'll keep you posted as to how things are going and what I find. Thank you
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Old Aug 27, 2015 | 01:08 PM
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You need to host your images somewhere like imgur, facebook, flickr, etc. and then post them with image tags.

Back to the car. Is it an otherwise stock engine running with the stock computer? Is it using a MAF sensor? Has it previously been tuned using hp tuners or similar?
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Old Aug 30, 2015 | 11:23 AM
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Hi 1970camarors,
This is whats been done to the motor. 1999 Corvette LS1 ZO6 intake, ganatelli MAF, BBK throttle body, 1.85 ratio rockers, fuel rails and injectors with BPS fuel pressure regulator and Fuel return line. Computer Del Vats, Del emissions, Del rear 02's single fan 160, Del trans/vss. Thank you for replying. Sorry for the late reply been really busy. Going to be back working on this car tomorrow or Tuesday so will report back what I find. Thank you everyone for the help!!
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Old Aug 30, 2015 | 10:37 PM
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I agree with the above. Most of the issues I have run into have been bad grounds. Even factory grounds.
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