would no tune cause horrible backfiring?
02-26-2007, 02:17 PM
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would no tune cause horrible backfiring? I had a 224 cam tuned with hp tuners, but now i have heads, 230/234 cam, fast ported intake, tb, lt headers and it is backfiring like crazy. could this just be a simple tuning issue? It isn't sounding like it but would love to hear others advice.
02-26-2007, 02:27 PM
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Check your spark plugs too. I went through the same thing the other day.....I put the headers on and drove the car on open headers. The next thing I know....bank 2 plugs were fouled out.
02-26-2007, 03:26 PM
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It could be tune related, spark related (wires, plugs, etc.), or it could be O2 related. I would check over the mechanical items first (O2 sensors, plugs, wires, MAF) and make sure they're all connected/working properly. If they are, then I'd start looking into the tune
What heads did you switch from and switch to? Sometimes, they take a whole different timing curve.
What heads did you switch from and switch to? Sometimes, they take a whole different timing curve.
02-26-2007, 03:32 PM
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Originally Posted by SSpdDmon
It could be tune related, spark related (wires, plugs, etc.), or it could be O2 related. I would check over the mechanical items first (O2 sensors, plugs, wires, MAF) and make sure they're all connected/working properly. If they are, then I'd start looking into the tune
What heads did you switch from and switch to? Sometimes, they take a whole different timing curve.
What heads did you switch from and switch to? Sometimes, they take a whole different timing curve.
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02-26-2007, 04:00 PM
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I just swapped my tr224 for the cam in my sig. Same thing was backfiring really bad. I ended up finding the plug wires were loose on a few cylinders. Check that first. It ran okay untuned
02-26-2007, 06:27 PM
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Originally Posted by nomorews6
the heads i switched from were stock 98 heads and switched to are tsp prc 5.3 2.5r heads milled to 62cc.
02-26-2007, 08:03 PM
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jUST INSTALLED TORQUER 2 AND SAME PROBLEM. ALREADY REPLACED EVERYTHING BUT HAVING TUNE, SO I SUGGEST TUNE! ONE HELPFUL HINT THOUGH, WHEN I PUT PLUGS IN IT RAN DEADLY FOR ABOUT TWENTY MINUTES, JUST LONG ENOUGH FOR THE STOCK TUNE TO FOUL OUT THE PLUGS. REPLACED O2'S, MAF, PLUGS, WIRES, THE WORKS SINCE CAM. GET TUNE, I KNOW I NEED TO