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The Terminator
Exhaust
03 Cobra observation-bad cats-please read.
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<blockquote data-quote="Randee of the Redwoods" data-source="post: 118575" data-attributes="member: 2276"><p>Been reading up on some of the delivery problems some of you have had. I also read up on the dyno tune posts. I don't know if any of you have noticed, but I've put two and two together and formed an observation.</p><p>The biggest complaint/problem so far seems to be "bad gas", loading cats and fouled plugs. One guy said he had an egr hose pop off on the test drive. Problem turned out to be loading cats creating intense back pressure. Another fellow said he looked under his car and his cats were "red hot". This goes with the majority posts saying the cars are delayed at the dealer for plug and cat replacement. Keep up with me.</p><p>I then read the dyno results. I also read the tuning results with something called the MAFterburner. Go back and read that post, especially the one where the guy listed the a/f characteristics. He said the a/f ratio fell off the chart. It actually went below 9:1. That's terrible in any book. Not to mention terribly rich. Most likely tuned that way for durability, but imagine the economy you would possibly pull out of that with some simple adjustments. </p><p>Figure all this out yet?</p><p>Ever seen what happens to a car running overly rich(raw gas smell from the tail pipe)? Car runs terrible. Engine will "bog". Plugs will foul. And, yes, cats will load up with gas and glow red as they heat up to operating temp which is something like 1000*F(could be wrong there). I've heard of this quite often in the Super Coupe circles I used to be in as those motors ran rich from the factory(my 92 ran 10:1, then 9:1@5000 rpm). Tuning the motors was tedious as they required a/f adjustments before anything else. Word going around was the over rich conditions were programmed in for durability, i.e. save headgaskets. (Mine blew at 74k miles).</p><p>Well, I don't know Ford products near well enough as some of you hear, but it looks as if FoMoCo is back to their old tricks. Based on the description of the problems and the dyno tune results, I'd say the Ford has brought this problem on themselves.</p></blockquote><p></p>
[QUOTE="Randee of the Redwoods, post: 118575, member: 2276"] Been reading up on some of the delivery problems some of you have had. I also read up on the dyno tune posts. I don't know if any of you have noticed, but I've put two and two together and formed an observation. The biggest complaint/problem so far seems to be "bad gas", loading cats and fouled plugs. One guy said he had an egr hose pop off on the test drive. Problem turned out to be loading cats creating intense back pressure. Another fellow said he looked under his car and his cats were "red hot". This goes with the majority posts saying the cars are delayed at the dealer for plug and cat replacement. Keep up with me. I then read the dyno results. I also read the tuning results with something called the MAFterburner. Go back and read that post, especially the one where the guy listed the a/f characteristics. He said the a/f ratio fell off the chart. It actually went below 9:1. That's terrible in any book. Not to mention terribly rich. Most likely tuned that way for durability, but imagine the economy you would possibly pull out of that with some simple adjustments. Figure all this out yet? Ever seen what happens to a car running overly rich(raw gas smell from the tail pipe)? Car runs terrible. Engine will "bog". Plugs will foul. And, yes, cats will load up with gas and glow red as they heat up to operating temp which is something like 1000*F(could be wrong there). I've heard of this quite often in the Super Coupe circles I used to be in as those motors ran rich from the factory(my 92 ran 10:1, then 9:1@5000 rpm). Tuning the motors was tedious as they required a/f adjustments before anything else. Word going around was the over rich conditions were programmed in for durability, i.e. save headgaskets. (Mine blew at 74k miles). Well, I don't know Ford products near well enough as some of you hear, but it looks as if FoMoCo is back to their old tricks. Based on the description of the problems and the dyno tune results, I'd say the Ford has brought this problem on themselves. [/QUOTE]
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