Just got my 450 injectors in , and put the setting in, at like 35 start and 40 the rest of the way, and it work fine when you re driving normally but when you get on it it just boggs down, like a motherf*****, try just about every setting but still kept on doing it, any help would help a lot, if you read this and have a slightest idea post it up thank. Alredy changed the spark plug wires, and put in ngk v-power plugs they are colder than stock.




[Modified by therumblingteg, 2:19 AM 8/23/2002]

 

 

Where do you have the hi/low throttle settings? Are the settings the same for the high/low setups?
Nick

 

Both the settings are at 40, idle 35, but the light still comes on, at 7 psi, and hi/low point is at 71/72 I tried 98/99 nothing.

 

the problem is that you aren't trimming enough voltage and it's dumping fuel. 450cc is approx. 47% larger than the stock 240cc injectors. Therefore, you must trim the MAP voltage by that same amount to be metering the same air/fuel ratio. However, you want it to be a little richer for the turbo so 40-45% should be what you shoot for as the voltage trim. Can I have some money now?

 

I put it on 50 and it did the same thing, I was wondering could it be my fuel pump?

 

if your car seems like its almost redlining then you have the same prob that i had
>dsm 450 inj/255 pump/vafc

go out and buy new plugs, ngk 2 steps colder
i had platinum plugs brand new and had the same problem
let me know if it works so you can send me some $$$$!!!

 

you do realize we mean, negative, (-35%, -40%) on hi low settings?

ohh and if this works i'll take my payment in liquid format

 

Did you convert from a FMU setup?
If so, did you take the check valves/missing link and FMU out?
Both of those would cause the problem you described. I win.

 

took out the fmu thats the only thing I had stock fuel pump,( i am going to swap with my freinds ls and see if it is my pump). Yes I was talking about -50%. As for plugs I got colder ones but I dont know if they are 2 step colder, but they are colder than stock. where could I get some 2 step colder and how much?

 

Are you SC or turbo? What is your a/f reading? MAke sure your map is seeing boost and Vafc is hook up right.

 

Put your car on the dyno and have a good tuner tune it for you and quit guessing you will blow it up .....

 

NO tuners live anywhere close to where I live. My map sensor is good, I used those big *** resistors from radio shack 10 watt 10 oms, could that be it Tommorow I am going wo try to swap a fuel pump from another teg and see if that is the problem? any other ideas. IT is turbo, I have my afc hook up with t comnnectors but tommorow i am going to sauter them.


[Modified by therumblingteg, 5:52 AM 8/25/2002]

 

Ya, you could be leaning out with the stock pump, but I would think that would only happen at higher rpm. Wouldn't hurt to try though. What did the plugs look like? I would do a run and shut it off right away. Take a look at your plugs. If they are white than you are leaning out.
BTW, the plugs are NGK BKR7E, BKR7E-11, or BCPR7Es. Gap them to .032. Any auto store should have them or be able to get them.
That's another question: What gap are you running now?

 

I let my brother take my car to work and some one set the sensor type to karman, i changed it abck it all good now thanks every one for helping me out.

 

please elaborate more on what they did to fix it?

 

if you have four good 450cc injectors, trim out -45--40% of the fuel with the afc(that is hooked up properly) it will work. if it's still not, then you have a problem with the pump, the fuel lines, or it's not fuel related. the stock pump, in good condition, will flow plenty of gph for those injectors at stock fuel pressure...what's your pressure?


[Modified by ion_four, 2:08 AM 8/26/2002]