turbo boost....

[xxthayxx]

just get a FCD because the missing link isn't all that good. check out 2gnt.com, i got one from mike (eclipse982nrRST) at a good price.

Team 2GNT Forum - Viewing topic #110681 - FS: FCD's aka Fuel Cut Defenders.

 

[newdsmtnr96]

this true? your fuel pump would probably explode if you ran 16 psi with an fmu and just a pump haha. im using just a 12:1 fmu and walbro pump and running 6 psi and that is my limit. Popped my headgasket with my turbo at 7-8 psi.

your friend is probably using an sfmu and with one of those, you can use bigger injectors because you can adjust the base fuel pressure and lower it so it doesnt flood out the car. the safc is ONLY good for leaning out fuel on our cars, not adding it. that is why people only use it with an sfmu setup with bigger injectors to fine-tune their idles. it doesnt work at all under boost. sfmu+bigger injectors+safc is only good until 16 psi because the timing is advancing too much at that level because u have no way to modify it. that is why aem f/ic or msns is the next best options because timing is adjustible along with fuel.

 

[Blitzeclips]

OK. So your FMU is good and your boost controller is kind of wacky. Reason I say that is because it should be allowing more boost then 7 psi if you have it turned all the way up..

At this point, if 0-4psi is responding great, but the car is having trouble reaching 7 psi, I would like to say it could be a boost leak. I know you said you tightened all the clamps and what not but make sure you take off your front bumper and check those too. They are subjected to more abused because the bumper flexes as you drive so of anything that's where it may be.

I meen, do you have a boost leak tester? I would seriously check that. %99 of the time when people say they aren't building boost it's related to something of that nature.

WHats your vaccum looking like? Oil pressure too? Consistent under boost? Is it consistent under the strain to reach 7psi? Or does it fluctuate and shake the needle?

 

[selmerguy]

Ok it has been awhile since I messed with the 420a. But since I am board and you are from my home town I will do my best to help you out.

If I remember right the older fuel system eclipses do not need a FCD or missing link. Since you picture shows a FMU in the engine bay I am going to assume that that is what you have.

You can run 10 psi on stock injectors and a fmu but.... I wouldnt. thats 155 psi of fuel pressure.

My guess is that you have a boost leak. You need to build a tester. I never relized how important this tool is untill I got my 1g. If you have a leak and you are only boosting 7psi your turbo is working really hard. I know it is a ebay turbo and if a boost leak is the problem then it will be toast if you dont fix it. If you dont know what a boost leak test is do a search. Very simple.

What spring is in your wastegate? Try running straight vacuum to your wastegate without that shitty MBC. See what you get for boost. But first fix your boost leak(s) if you have them.

 

[newdsmtnr96]

I will do a pressure test soon, it snowed here agh. But yeah like as long as i shift to 3000 it doesn't kick in. (waste-gate) I really think that is part of the problem, I don't know what the spring is at. It could be at 5 pounds for all i know, as soon as i can I'm going to check that too. As for that missing link. xxthayxx sounded like it could be what he was saying it gets very rich when boosting. I'm about to take this AFC of cause it doesn't seem to be doing anything i know it is all hooked up correctly. I cant seem to lean it out at all. I don't have the map sensor connected cause when i did my motor bogged down a hell lot and stalled (before turbo put on) so i been running with out it. I followed all the steps on 2gnt for installation

 

[Locke]

You're driving without your MAP sensor plugged in?

 

[newdsmtnr96]

OK heres an
::update::

I did a leak test. My valve cover to the PVC valve was leaking to the catch can. I i tightened that up. But when i was taking that off i found something weird. Some greenish type of liquid. Anti-freeze i was thinking? Then i looked at my looked at dipstick no water no anti-freeze, Everything smells good too. So I'm thinking i might have a minor small crack in my head, but its not for sure yet. I'm going to give it some time and check it frequently. Tell my next oil change. As for the boost issue. Until i get my new injectors I'm going to only boost 5-6 psi. So i turned my mbc knob a 1/4th turn. this is all for now ...

 

[newdsmtnr96]

You're driving without your MAP sensor plugged in?

no it was plugged in when i had it hooked up to the afc

 

[VelocitàPaola]

I don't think you would really be able to see water or coolant on the dipstick. Drain some or all of your oil and then take a look at it. If it's a light, milky color, or if you can visibly see a water/oil emulsion, then you've got problems. You can also look at the coolant overflow reservoir and check for oil. I wouldn't necessarily jump to the conclusion that the head is cracked (although it is a possibility), but I'd certainly suspect the headgasket.

 

[newdsmtnr96]

So i went to test drive again. No leaks i had to turn my mbc down a little to run 5 psi. So i rather run 5 psi then 7 that is going to make my engine lag. I Believe that its in the external waste-gate and the mbc that i can not boost more then 7. I have a spare head I'm thinking about rebuilding that because the port and polish i have probably isn't the greatest and made my head i have on now weaker. Any one have any idea's what i should throw on this new head? I have a spare intake Mani with injectors and fuel rail.

 

[selmerguy]

You should try to run straight vaccume to the wastegate. Take the MBC out of the equation for now. See what boost you get then. What are you going to use to control your new injectors? What size are they?

 

[newdsmtnr96]

right now stock injectors, Using a AFC, But no missing link sensor. i wanna get that and a sfmu before i try to boost more. But still psi is an issue. I found that there was a leak some where else too a very small one so i fixed that issue.

 

[newdsmtnr96]

Tial 38mm External Wastegate


Problem fixed i know the issue. I will be buying a better spring. Thanks every one who helped

 

[RSTeclipse97]

Like everyone has told you ,you need a missing link or fcd. I had kinda the same prob and i had the missing link. My prob was still fuel. Get your new injectors and some sort of fcd/missing link and youll be fine. I just put slightly larger injectors in mine to hold me off till i got a sfmu. You are not sapose to boost more than 10-12 psi on an fmu though i think so dont go past that

 

[Car_guy_09]

Like everyone has told you ,you need a missing link or fcd. I had kinda the same prob and i had the missing link. My prob was still fuel. Get your new injectors and some sort of fcd/missing link and youll be fine. I just put slightly larger injectors in mine to hold me off till i got a sfmu. You are not sapose to boost more than 10-12 psi on an fmu though i think so dont go past that

Actually you not supposed to go over 6-8psi if you dont have a wideban, Now if you have a wideban you can turn it up til you run out of fuel im running 8psi spikeing to 10 wit no problems bu t every cars diffrent.

 

[newdsmtnr96]

am running 3 psi cause the wastegate leaks.. got my new 44's and my new sfmu.. Now waiting for $$$$ for the fcd

 

[Car_guy_09]

am running 3 psi cause the wastegate leaks.. got my new 44's and my new sfmu.. Now waiting for $$$$ for the fcd

I was hitting 6psi by redline with no wastegate actuator (basically wastegate wide open all the time).

 

[Blitzeclips]

I was hitting 6psi by redline with no wastegate actuator (basically wastegate wide open all the time).

Oh yeah? My car can fly..

 

[Car_guy_09]

I bet you have that plane kit huh blitz

 

[Mr Peepers]

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[bullettdsm]

Lol@ da Peepers.

Did you notice my man Hoff did that without a seatbelt? Impressive

MB

 

[Slippi84]

Lol@ da Peepers.

Did you notice my man Hoff did that without a seatbelt? Impressive

MB

Just some info to help educate. I see a lot of 420a guys ask what injectors someone is running and then start talking about fuel cut. Fuel cut is not a fuel thing it's a air thing. The engine in stock form or I shoudl say ECU and sensors in staock form have a air clamp. Meaning when it senses a certain amount of air or pressure it cuts fuel. Fuel cut is not a matter of not having enough fuel. If that were the case the car would just run lean and knock. I know you think yoru spring is your problem but it's not. Your manual boost controller even thought it's a cheapy is good enough to raise your boost double that of yoru spring in your wastegate. So unless you have like a 3psi spring your have another problem and like everyone said I'm betting on FCD or missing like so let us know when you get one what happens.

 

[xxthayxx]

hey newdsmtnr96. did you get the FCD?

 

[newdsmtnr96]

yeah but it didn't work. We also tested in with multi-meter. tried to get it running the best we could. Didn't work, I'm going to try the missing link. I noticed that some people have bad experiences with the fcd and works good with the missing link. Then some have good experiences with the fcd and bad with the missing link. If this doesn't work, Gotta try something new.