 Dangers of Running Rich, 3sgte owners |
 Sep 29, 2004 - 11:02 AM
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Enthusiast  Joined Jan 17, '04 From Illinois Currently Offline Reputation: 0 (0%)  |
Well, ten days into ownership of the 3sgte and I can safely confirm what everyone else has said over and over....these engines run very rich. I have read many posts about this and about the fact that Toyota made it this way to avoid lean conditions. However, I would imagine that running an overly rich condition cannot be good for the engine over time either. I am wondering whether for engine longevity and reliability purposes, us 3sgte owners should take action either through an S-AFC or stand alone to lean out the A/F ratio. Obviously, we can see some horsepower gains from doing so but I am particularly interested in responses dealing with engine life.
-------------------- QUOTE(lagos @ Jul 10, 2006 - 1:55 PM) [snapback]454118[/snapback] i know your trying to do the right thing for your motor, but this is one of those times where you should just trust the guys who have had their swaps for a while and have done a ton of research into this. |
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Oct 10, 2004 - 12:30 AM
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 Enthusiast Joined Jul 25, '03 From Santa Barbara, CA Currently Offline Reputation: 0 (0%) |
What's the danger in having it so rich that the engine stalls? My car (91 MR2t) has been doing this, but it only stalls sometimes. Usually the RPMs will just jump up and down for a few seconds, then even out at the normal idle state. However, on rare occasions it will stall. I think I'm beginning to figure out the problems my car has been having. It has 550cc injectors with a Supra fuel pump, but NOT an upgraded fuel rail. I've heard the upgraded fuel rail is vital after upgrading the fuel pump and injectors. I'm trying to find out if this is the missing piece to the problem. The S-AFC supposedly (i.e. according to the seller) was tuned correctly when I bought the car. But on that setting, the car would not go past 4k RPMs (but idles fine). Then when I set it to the other data file (i.e. the default setting) it ran fine, except for the low/jumping idle. What I'm thinking is: a) The S-AFC is tuned for the 550cc injectors, but having the stock fuel rail is causing it to not go above 4k RPMs, or b) The S-AFC is not tuned correctly. Any ideas? |
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Posts in this topic
jgreening Dangers of Running Rich Sep 29, 2004 - 11:02 AM
Jdog1385 you should try to lean it out a bit. nothing craz... Sep 29, 2004 - 11:05 AM lagos my theory is that the swap runs richer then a norm... Sep 29, 2004 - 11:07 AM jgreening Lagos, I am still running the 5sfe pump. Jayson c... Sep 29, 2004 - 11:12 AM Supersprynt Keep in mind they have 3sgte fuel pumps that are r... Sep 29, 2004 - 11:22 AM jgreening QUOTE Keep in mind they have 3sgte fuel pumps that... Sep 29, 2004 - 11:25 AM Supersprynt I figure because they are a different generation. ... Sep 29, 2004 - 11:27 AM jgreening Whats a TC? Also, are you going to do any engine ... Sep 29, 2004 - 11:46 AM Supersprynt tc - turbocharger, my bad I start shortening thing... Sep 29, 2004 - 12:12 PM 97sccelica it fouls o2 sensors sooner(only if very very very ... Sep 29, 2004 - 12:17 PM Supersprynt ECU's dont dump more fuel they retard timing. ... Sep 29, 2004 - 12:22 PM shid I think the issue about fuel pumps might be someth... Sep 29, 2004 - 12:38 PM Supersprynt No, that doesnt make any sense at all, LOL sorry I... Sep 29, 2004 - 2:17 PM Kwanza26 Running a bit rich doesn't hurt the engine. I... Sep 29, 2004 - 5:04 PM shid QUOTE (Supersprynt @ Sep 29, 2004 - 7:17 PM) No, t... Sep 29, 2004 - 8:34 PM Doge QUOTE (jgreening @ Sep 29, 2004 - 9:12 AM) Lagos, ... Sep 29, 2004 - 9:07 PM Doge QUOTE (lagos @ Sep 29, 2004 - 9:07 AM) my theory i... Sep 29, 2004 - 9:13 PM jgreening Thanks for the post Doge. It looks like up to 12p... Sep 29, 2004 - 9:26 PM Supersprynt QUOTE (jgreening @ Sep 29, 2004 - 10:26 PM) T... Sep 30, 2004 - 7:30 AM thedevilmaycrie QUOTE (Doge @ Sep 29, 2004 - 6:07 PM) QUOTE (jgree... Sep 30, 2004 - 10:06 AM jgreening QUOTE How do you figure 180whp at 12psi? The JDM 3... Sep 30, 2004 - 12:25 PM Supersprynt I've never heard 221 stock, only 225. Now, 10%... Sep 30, 2004 - 12:54 PM Doge QUOTE (thedevilmaycrie @ Sep 30, 2004 - 8:06 AM) Q... Sep 30, 2004 - 5:56 PM Coomer QUOTE (Supersprynt @ Sep 30, 2004 - 10:54 AM) I... Sep 30, 2004 - 6:26 PM Supersprynt http://www.mr2oc.com/showthread.php?s=&threadid=55... Oct 4, 2004 - 4:42 PM lagos so.... if fuel pressure is controled by the inject... Oct 4, 2004 - 7:21 PM Supersprynt we do have FPRs, stock FPRs. Oct 4, 2004 - 11:18 PM jgreening QUOTE After reading through this <very long... Oct 5, 2004 - 1:47 PM Doge Yeah you have to know what you're doing to get... Oct 10, 2004 - 3:30 AM YellowTwo QUOTE (Doge @ Oct 10, 2004 - 1:30 AM) Yeah you hav... Oct 10, 2004 - 4:15 PM
jgreening I just thought I would share this answer to my ori... Oct 15, 2004 - 3:17 PM |
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