Turbo Help!!! (Full Version)

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Turbo Help!!!

  

mbo1985 -> Turbo Help!!! (2/12/2006 8:06:24 PM)

My buddy and myself installed the turbo in my 96 accord this weekend. went to crank it up and it's just horrible. It seems like whenver you hit the gas (boost or no boost) the motor just wants to quit. If you go easy on the throttle, you can get the motor to drive normally, but as soon as you give it a little more gas, it starts to die (the car will barely get to 0 psi). According to my air fuel ratio gauge, I am going severly lean as i approach boost (or even when I push the gas). I am using a 12:1 FMU and have tried reversing to connetions to it to see if that changes anything. I am also using a missing link MAP bypass. Anyone else ever had a similar problem? Thanks for any help.

  
lightshow -> RE: Turbo Help!!! (2/12/2006 8:32:34 PM)

hey....good luck with that.. youve given us so little to work with. if you have the missing link or the fmu hooked up wrong your car is going to run horribly. let me start with this

- turbo
a great turbo to get is a second generation mitsubishi eclipse turbo/ T3-T4 garret/airresearch

-wastegate
turbonetics deltagate with a 7psi spring

-manifold
can be purchased or custom made at the shop. a simple log style manifold can work very well and is the cheapest. a tubular manifold is more efficient and costs a little more

-intercooler
can also be taken off a mits eclipse but a slightly larger front mount intercooler would work best.

-blow off valve
hks or other quality brand

-boost dependant FMU (fuel pressure regulator)
vortech FMU

-manifold pressure bleeder
synapse missing link

-high volume fuel pump
walbro 255lph




now up there is the fuel pump....did you put a good one in? i think this may be your biggest problem but i will go over some other things.

your map. if it is reading boost your car will misfire....is it? put a guage on the line leading to the map what does it say?

the fmu...you have to have this hooked up right and you should be running a vortech. this may sound stupid....but there are THREE lines that hook up to it. fuel in fuel out and BOOST. make sure that when the turbo starts to spool that there is boost in that line.

if there isnt enough fuel pressure in the line to support boost then your car is going to run bad.

mbo1985 -> RE: Turbo Help!!! (2/12/2006 8:48:02 PM)

I tried to swap the two fuel lines on the FMU (it is a vortech style). I think i had the fuel line going into the rail coming from the outlet on the fmu that is dead center on the bottom (not the one with the 90). I have the vacuum line connected and it is run straight from the manifold. I checked for vacuum, so I would assume boost would also get to it.

I tried to mess with the missing link. I made sure it was on there and made sure the check valve was functioning (it worked). I never threw a code for hi MAP reading either. The engine seems like it is really lacking on fuel, even before I'm getting boost. I think it's cutting out rather than misfiring, but I could be wrong. I have not replaced the fuel pump or injectors.

Bad FMU? Not enough fuel pressure (even at low RPM?)? Thanks for your help so far, lightshow!

lightshow -> RE: Turbo Help!!! (2/12/2006 9:08:45 PM)

well it sounds like your not getting enough fuel. i have heard of people using the stock injectors on cars making 400 hp so i dont think its that. but....even your stock fuel pump should be able to support 'some' boost. the fuel pump should be upgraded but i think the boost line your running to the fmu is not right or the fmu itself is not right. let us know how its going. another stupid thing though...make sure the fmu is hooked up to the fuel return line and not the line coming into the rail.

marbro -> RE: Turbo Help!!! (2/12/2006 10:47:34 PM)

This is pretty random but make sure the seals for your MAP are good, if any air can get through there it wont throw a code. I found this out when changing my throttle body.

lightshow -> RE: Turbo Help!!! (2/13/2006 3:45:02 AM)

what no more posts? thats bull you should be up all dang night figuring out why your cars not ripping down the street.

mbo1985 -> RE: Turbo Help!!! (2/13/2006 8:14:37 AM)

Sorry bro, I know I should be up all night (and I was basically. How could I sleep with my car like this??!). Now wait a sec man. I know that I have the FMU coming hooked up to the incoming fuel line. I noticed a return line that ran from the factory installed fuel pressure regulator, but the FMU isn't hooked up to that. Dang man, I feel stupid as heck. Do you think this is the problem??

lightshow -> RE: Turbo Help!!! (2/13/2006 3:10:11 PM)

if the fmu is hooked up to the incoming line.........this is 100 percent the problem with your car. let me explain.

the fmu essencialy blocks the incoming fuel increasing the fuel pressure so that when the injector opens. more fuel comes out. if you put the fmu before the fuel rail.....it is going to stop the fuel from going to the injectors.



the fmu absolutely positively must be installed aft of the fuel rail AND the stock regulator. so that when it senses boost. it will increase the amount of fuel pressure in the rail. good luck your not dumb turbos are extremely difficult to install. let us know how it worked out.

mbo1985 -> RE: Turbo Help!!! (2/14/2006 8:15:26 AM)

Here's an update.

The FMU was the major problem. I put that where it should be and that fixed the fuel cut off problem. The manifold I had made for me was warped (like a bow), and was leaking mad on the sides. I machined some metal off and got it even and bolted back up. Time for a test drive.

The turbo spools up very nicely in 1st gear, resulting in a myself getting thrown back in my seat. I like that part! Shift to second (and other gears) and the turbo doesn't spool up as nice. I'm not sure if it's just no spinning (why would it matter gear to gear?) or that boost is leaking out. I also go very lean in second at WOT, so I am instinctively backing off the gas, which could be the cause of the lack of boost.

I noticed that the wastegate (hks style) and bov (raptor style) have 2 vacuum inlets. I am only using one on each (the tops ones). Should I hook up the other ports? Also, I do not have an inline fuel pump, which could cause the lean out I assume.

As soon as this stuff gets all working, I'm looking at one very mean car.
Thanks for all the help!

lightshow -> RE: Turbo Help!!! (2/14/2006 1:04:14 PM)

yea just one hose on each one is just fine. boost creep and surge and stuff and just general maximum boost is something you will have to fine tune when you get it running real good. you dont want to go over 7 or8 psi on the system. as long as you hear the bov blowing off....its working just fine. if you dont hear it, you may have it hooked up wrong and it could be stopping the turbo dead, so it doesnt spool well when you get into second. but i think the reason your turbo isnt spooling well in second is your lack of fuel. you need to get more fuel to that system. a weak a$$ lean mixture is not going to be able to bring the turbo to tip speed. plus i think a few more hard lean runs and you MAY need an engine rebuild. i would think about changing your plugs right now because they are probably toastttt. you need to get an inline pump or the walbro in tank pump. good luck let us know how it goes im glad i was able to help.

mbo1985 -> RE: Turbo Help!!! (2/14/2006 5:42:34 PM)

I know the motor wasn't pinging and I wasn't real hard on it. As I saw the mix go lean, I really backed off it. I just put in some new platinum 2's, so I hope I didn't kill them. I have the walbro 255 on order, but I heard it wasn't great for a FMU type setup. Should i order an inline one (like the MSD?). I plan to run 6-7 lbs untill I build the motor.

I also noticed that the BOV seems to stay partially open at idle. Do I need to mess with the screww on top?

Turbo sound and BOV sound were good and hope the fuel pump will cure my lean condition. I'm also throwing a CEL code, so i'll have to look into that (probably something to do with my missing link).

Thanks for all the help man!

lightshow -> RE: Turbo Help!!! (2/14/2006 8:26:58 PM)

yea bosch plugs will blow your coil so you should change those out anyway. sounds like your bov is working just fine. the CEL is probably because of the extreme lean condition. yea an inline pump like msd would also work great. i actually recommend using the walbro, i think it works great with honda setup which usually use a FMU, but everyone has their opinion. yea but only use ngk plugs. your car may actually run a lot better with some good plugs in it. those plugs youre using now are producing a very weak spark, which is not what is needed in a boosted environment.

mbo1985 -> RE: Turbo Help!!! (2/14/2006 10:11:48 PM)

My sister's fiance turned me onto the bosch plugs. I never really understood the point of them, but he swore by them. You say they blow out coils? I had an MSD Blaster coil that lasted maybe a 1/10 of a day before it went dead (using platinum 4's) . Hmm that explains things...

lightshow -> RE: Turbo Help!!! (2/14/2006 10:45:24 PM)

yea thats definately why that coil went toast. they will actually give you bad gas mileage and reduce hp too. bosch plugs in an audi or something german like that are great, but in a honda......ngk only.

mbo1985 -> RE: Turbo Help!!! (2/16/2006 8:35:58 AM)

I'm considering the Apexi Super AFC 2. Any thoughts on this? I was also wondering what my stock MAP sensor can handle.

I got the NGK's. I'll be tweaking my car today, so I'll have an update later. Hopefully all goes well.

  

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