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cam and head swap car wont stay on

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Old Jan 30, 2021 | 08:44 PM
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jesse duran's Avatar
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Default cam and head swap car wont stay on

Like the title says, I have a ls1 with new stock replacement pistons, ms3 cam, racetronix 255 fuel pump only. fast 102 intake with 102 TB from fast, ls3 fuel rails, and ls3 fuel injectors, and it has bench tuned. now i have a P0300 code, first start up the camaro turned on well, oil pressure well over 50 psi, temp was good, and fuel gauge was showing full. not sure why. I also checked the fuel rail and it sprayed so i know theres fuel. after 3rd start it turn on with a little help from the gas pedal. After that it doesnt want to turn on. So my question is why isn't it staying on? i gapped the spark plugs to .40. going to list all my mods under.


fast 102 intake, ms3 cam, fast toy lid 104, 100 maf, racetronix 244 fuel pump, 243 heads ported and polish, new valves, ls2 timing belt, ls7 lifters, monster stage 2 clutch, 342 gears, 6 speed manual transmission. as right now it only has a bench tune, ARP rod bolts, dual valve springs, dual valve springs.

is my first build so im trying to figure it out.

thank you.
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Old Jan 30, 2021 | 09:23 PM
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A bench tune isn't going to be enough for those mods. Get a real tune.
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Old Jan 30, 2021 | 10:44 PM
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@AwesomeAuto Yes i hope that the case. will have to wait till monday maybe. im going with luck.
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Old Jan 30, 2021 | 10:45 PM
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anyone else?
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Old Jan 31, 2021 | 12:45 AM
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AwesomeAuto is exactly correct

Ron
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Old Jan 31, 2021 | 10:56 AM
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Does it run at all? Factory PCM? Any codes stored besides P0300 (Random Misfire)? Need at least 20psi of fuel pressure to run. What is fuel pressure at the rail?
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