5.3 P0300 after header install
03-23-2014, 09:27 PM
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5.3 P0300 after header install
2004 5.3 with black bear tune and 212/218 cam.
Just had to pull heads the get some broken bolts out so I could install my longtubes.
Got everything installed and started truck up. Everything ran okay. It stumbled at first drive but then went normal. Had a p0300 code come up and an expected o2 sensor code. Cleared those then drove 45miles to home. Let it sit for about 2 hours.
Went to start the motor and drive a mile to get food and bam, started stumbling and missing and the CEL was flashing. Cleared the codes, and then it happened immediately after again. Cleared that code and let it idle for a bit and all seemed well. Went to drive thru and the CEL started flashing so I revved it and then it went away. Has not been retuned yet. Ideas?
Just had to pull heads the get some broken bolts out so I could install my longtubes.
Got everything installed and started truck up. Everything ran okay. It stumbled at first drive but then went normal. Had a p0300 code come up and an expected o2 sensor code. Cleared those then drove 45miles to home. Let it sit for about 2 hours.
Went to start the motor and drive a mile to get food and bam, started stumbling and missing and the CEL was flashing. Cleared the codes, and then it happened immediately after again. Cleared that code and let it idle for a bit and all seemed well. Went to drive thru and the CEL started flashing so I revved it and then it went away. Has not been retuned yet. Ideas?
03-24-2014, 12:26 PM
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I will do that after work and see what I find.
Would it be a problem if I mounted the plug wire to the coil upside down where the wire meets the coil at the bend? I only flipped them to change the angle of the wire to keep it from burning on the headers.
Would it be a problem if I mounted the plug wire to the coil upside down where the wire meets the coil at the bend? I only flipped them to change the angle of the wire to keep it from burning on the headers.
03-24-2014, 05:55 PM
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Went out after work and pushed in plug boots as far as possible. One seemed to click in one notch. Ran fine all the way home. Got a code saying bank 2 was too lean so I unplugged MAF, it idled like hell but the too lean code went away.
03-24-2014, 10:18 PM
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Okay pulled the codes that will NOT go away.
P0174 & P0151 - those two seem to pop up with each other every single time I drive and every now and then it throws out P0300 (random multiple cylinder misfire).
Should I start by replacing the passenger side upstream O2?
P0174 & P0151 - those two seem to pop up with each other every single time I drive and every now and then it throws out P0300 (random multiple cylinder misfire).
Should I start by replacing the passenger side upstream O2?
