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Type: Posts; User: sedme1

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    I did find out what was wrong. I had to break...

    I did find out what was wrong. I had to break down and take it to a shop. It turned out only to be a bad fuel pressure regulator. Why it gave the obd codes it did I don't know. ridiculous the money...
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    Yep, I've gotten to the point where I'm going to...

    Yep, I've gotten to the point where I'm going to have to take it to a shop............damn it.
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    I had the same problem with my 99 that turned out...

    I had the same problem with my 99 that turned out to be the stock radio slowly draining the battery. I can't remember exactly how I found the problem but it seems like I
    connected my 12v tester...
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    I cleared the check engine light then swapped...

    I cleared the check engine light then swapped the new number 4 injector with the number 6 and reran the obd scan.
    Still shows code P0304. Anyone have any guesses?
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    missfire #4 cylinder 5.3

    Already posted a while back but am starting a new one with some updates.

    99 GMC Sierra with the 5.3, 130,000 miles. The engine idles rough and the cel is on and its getting bad mileage. The...
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    I'm gonna get my own obd2 scanner....I'm in...

    I'm gonna get my own obd2 scanner....I'm in central MT and the nearest one for me to use is 50 miles away. I did clear the codes and the cel came on again after about 2 minutes of driving. Like a...
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    I cleaned the intake with seafoam. Didn't help....

    I cleaned the intake with seafoam. Didn't help.
    I took it back to O'Reilly's to check the obd2 codes again and this time it showed a po300 (random misfire), po141 Heater Circuit Malfunction (Bank...
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    I looked on their site. You must mean the seafoam...

    I looked on their site. You must mean the seafoam spray to clean the intake system... cool, been using seafoam for years but didn't know they had that product.
    Is there any particular vacuum line...
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    5.3 #4 cylinder misfire, valve carbon buildup

    I've got a 99 gmc sierra with the 5.3, 130,000 miles. The engine idles a little rough and the cel is on. The obd2 code showed a misfire in the #4 cylinder (P0304). So far I've replaced all the...
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