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post #1 of 3 (permalink) Old 10-15-2018, 02:41 PM Thread Starter
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Misfire questions

So, my CEL is on, codes p0300,01,02,03,04. Came on during full throttle operation at an autocross about a month ago. I didn't feel a miss, exactly. It felt something like when the traction control interferes, but I had traction control turned off. Automatic, felt loss of power in first gear, but it came back in second gear and subsequently.

It happened about a month ago, 90m miles from home. Seemed to run ok on the way home, and fuel mileage was normal. I have hardly driven it since, as the repair cost isn't in my budget. I'm suspecting a fuel supply problem, possibly the HPFP. Due to health issues, I quit doing my own maintenance a couple years ago. Any guesses what a HPFP replacement would cost at a dealer?

Kansas Bill
2008 Silver Red Line
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post #2 of 3 (permalink) Old 10-15-2018, 08:58 PM
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The dealer is going to charge you $499 just for the part. And about 3.2 hours of labor. It's really not that hard to do yourself. It's just tedious because you have to remove the cowl to get at it. You can get the part for $199 at ZZPerformance. But the dealer will use ACDelco to buy the part and it's $499. Look on rockauto.com and find it. ZZP's part is a true genuine brand new take off from an built LNF.
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post #3 of 3 (permalink) Old 11-13-2018, 01:55 PM Thread Starter
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After three occasions of tripping the CEL, with P0300, 301,02,03,04 codes, I took it to a dealer. He checked compression (148 in all 4 cylinders), fuel pressure, and spark plugs, and everything checked out ok. They did a reprogram of the fuel parameters, and believe everything is ok, so we'll see.

In addition, they ordered parts for the passenger presence recall, and parts (tape?) should be in tomorrow.

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2008 Silver Red Line
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