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Altitude Difference

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Old 01-17-2015, 03:08 PM
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Car: 91 B4C
Engine: L98
Transmission: T56
Altitude Difference

So I have a 91 camaro (S AUJP v5 8D) I've been tuning back up in Idaho. Startup was perfectly fine up there. I recently road tripped down to Mississippi car hauling it down here and now my startup seems rough. It takes around 5-10 seconds of cranking before it'll actually start. I'm in search of some ideas for the tune to figure it out. I recorded 2 startup logs just to see if I could find something off, but it seems to be spot on unless I'm blind. I will attach the logs to this post here in a second. I'm just looking for some ideas to help my situation. The car has a pretty big cam in it, Comp Cam 280XFI HR13 (280/288 .576/.570) 112 LSA.
Old 01-17-2015, 03:12 PM
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Car: 91 B4C
Engine: L98
Transmission: T56
Re: Altitude Difference

Here are the two recorded start up logs.
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File Type: zip
Startup.zip (13.1 KB, 6 views)
Old 01-20-2015, 01:46 PM
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Re: Altitude Difference

Fuel pump failure? Verify fuel pressure does not fall off under load. also I would replace the fuel filter if not done recently.
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