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.

 

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.

 

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!

 

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.

 

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.

 

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

 

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??

 

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.

 

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!

 

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.