Got My RB25 Running, Sorta, PROBLEMS! Help Please :)

[FinkenS14]

OK guys I got my RB25 S14 running today, and well I need some help working out the bugs.

Mods:

Stock S1 RB25Freddy IntakeStock TBYamamoto Tuned ECU (came with the motor set)Walbro 2553" Turbo ElbowCX Racing Front Mount

Thats basically it that is aftermarket

On the first start up everything seemed great. Idled great, and everything was going good. Took it for a drive across the street to fill up with fuel, and drove it back to the house. Went out again just for a drive, and noticed that the car doesnt like boost (WTF).

On the first drive, I was able to get around but the car would start to studder and jolt right when it got into boost, and it'd get past the studdering, and pull like normal, but felt very sluggish. The car also hesitates if you give the throttle a quick jab, almost tripping on itself. THe problem got worse the more I drove it.

Came back, fixed a coolant leak, did some other tweaks, and went out for another drive. Right away, even a little bit of gas, and it will studder. And even just 1-2 PSI makes the car studder real bad. Headed back home, and going around a corner, about 10mph, the car started to studder, and just died. After that it would just crank, but smell of fuel really bad. Checked for leaks, none. Just cranks.

So my question is, with the atmospheric blow off (HKS SSQV), on a stock MAF, with a Yamamoto tuned ECU, and a Walbro, is the car just drowning itself in fuel, and just finally fouled out the plugs? I havent taken them out yet, its too late at night now, Ill check tomorrow.

My friends are telling me with the tuned ECU and Walbro its just running way to rich.

Also another thing, without the Walbro, the car wud rev fine, no problems, but never got around to driving it on a stock S14 pump.

Also car is on stock boost.

Any body got any advice? Pretty sure at this point its not a boost leak, otherwise it'd still start, and not stink of fuel.

[StricNyne]

well do u know what the ecu is tuned for? thats for starters, how is the timing, how are the spark plugs (gap) and coil packs, how is fuel pressure ?

[FinkenS14]

I dunno what the timing is, I never messed with the angle of the CAS.

The spark plugs are brand new Denso Iridiums that the motor had when I got it.

Fuel pressure, thats my question guys, I dunno what it is.

Im checking plugs ehre in a bit.

[StricNyne]

make sure engine is cooled down when u take out and insert the plugs and as far as fuel psi do u have a fpr ?

[FinkenS14]

Problm figured out. When I fixed my thermostat the other day I unplugged the CAS and a few other things to make room. Looked at it this morning, and the CAS wasnt even fully clicked in. Car runs strong now on just wastegate pressure. Still studders every now and then though. Any thoughts?

[neonbomb]

You dont even know what that ECU is tuned for. Get a stock one

[rb25det250sx]

change plugs, bcpr7es NGK. gap to .8mm check fuel pressure.

but still your coil packs might be getting bad.

i coated mine in epoxy and it helped ALOT for a couple months. or you can use flexane 94 works good. but only a ten min work time, so you gotta work fast.just an idea