AMS Fuel Rail Noises
Oct 3, 2009, 12:22 PM
#18
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I'm going in Monday to have mine done and while I am at it replacing the potentially faulty fuel pump relay i.e., replace OEM relay ACV31212 (Black) with new OEM relay, ACM32221(Green); if this relay is faulty the fuel pump does NOT deliver enough fuel and AFR can reach as high as 13 or more at WOT. Additionally, I heard from the parts manager that there is a TSB on this relay but was unable to find it. Does anybody know what this TSB says and whether Mitsu will replace under warranty.
Later, Ken
Edit: OOppps... this post belongs here:https://www.evolutionm.net/forums/ev...pe-recall.html
Later, Ken
Edit: OOppps... this post belongs here:https://www.evolutionm.net/forums/ev...pe-recall.html
Last edited by KPerez; Oct 3, 2009 at 12:31 PM.
Oct 3, 2009, 11:17 PM
#19
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Already checked with the dealer. Since it's a recall they have to do the service no matter what. I'm a good customer (bought 4 new Evo's since 2003) and they are very reasonable when it comes to mods. The fuel rail shouldn't change their process for adding the brackets for the return line.
Oct 11, 2009, 12:43 PM
#20
Well I installed my new fuel rail. AMS Red Version. I have to say that I did indeed notice a increase in a sound. Not a metal vs metal sound, just like a amplification of resonance of the injectors. I have the DW800cc and I am not sure if it is the injectors that making the clicking sound. I know all injectors make a clicking sound.
I don't hear the sound while driving, just while idling. It is louder under idle. However, you do not hear the sound from the engine bay or with the windows open. Just while I am idling there is a slight sound increase from the engine bay.
I tried looked at all the connection, looked if anything was hitting anything. Re-tightened all the bolts and connections. Still makes the same sound. Can't notice it with the music on.
No big deal really, I'll get used to it and not even notice it's there later on.
GOOD News... the new fuel rail I noticed made my car richer. Yes as well now it backfires a bit more now. I am pretty sure that more fuel is available at the injectors, which means it is doing it's job properly. As well as it very eye appealing, BLING!
Caveat... with the recent fuel return line recall one bracket is hitting the fuel rail if it is not bent a bit more. It is the new front bracket located to the right of the two bolts that hold the return line bolted to the fuel rail. You have unscrew the bracket, put it in a vice and give it a few wacks with a hammer to give it a bit more bend so it will clear the AMS fuel rail. That is the only issue I noticed as far as install.
I don't hear the sound while driving, just while idling. It is louder under idle. However, you do not hear the sound from the engine bay or with the windows open. Just while I am idling there is a slight sound increase from the engine bay.
I tried looked at all the connection, looked if anything was hitting anything. Re-tightened all the bolts and connections. Still makes the same sound. Can't notice it with the music on.
No big deal really, I'll get used to it and not even notice it's there later on.
GOOD News... the new fuel rail I noticed made my car richer. Yes as well now it backfires a bit more now. I am pretty sure that more fuel is available at the injectors, which means it is doing it's job properly. As well as it very eye appealing, BLING!
Caveat... with the recent fuel return line recall one bracket is hitting the fuel rail if it is not bent a bit more. It is the new front bracket located to the right of the two bolts that hold the return line bolted to the fuel rail. You have unscrew the bracket, put it in a vice and give it a few wacks with a hammer to give it a bit more bend so it will clear the AMS fuel rail. That is the only issue I noticed as far as install.
Oct 12, 2009, 09:49 PM
#21
I also noticed a small fuel leak today coming from the stock return line It is from the hose coming off the FPR going into the fuel return line. The fuel was leaking past the OEM spring clamp. I replaced it with a worm gear clamp and it fixed the fuel leak issue. The fuel lines should not have those POS Mitsu clamps.
Oct 12, 2009, 10:35 PM
#22
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My 3-port vents to atmosphere rather than into the turbo inlet. I kinda like the sound.
I've actually decided to do an E85 conversion and just ordered the DW1000's instead (yup, I'm dumb for not doing that in the first place). 50hp is tough to pass up, tho.
I wish we had E85 readily available here in OH. But, we don't best we have is 93/94 and a 100 octane a few miles away from the house.
Jan 14, 2019, 07:36 AM
#24
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No. The stock rail will not flow 600hp, or even 500hp worth of fuel @ 3bar (43psi) fuel pressure. Even with increased pressure this is a stretch and would be overworking the fuel pump. The main issue is the inlet that's necked down really small where it enters the rail.
Take a look at this EvoX Group N rally car. Notice one of the few modified items on the engine is the inlet of the fuel rail (@ 4:54). -
Last edited by turbonick; Jan 14, 2019 at 07:43 AM.
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