Adrenaline XXIV

Alright, well I guess the easiest way to start this question is by giving you guys a brief history on my turbo problems.

I have a d16z6 with an ebay turbo kit. For the longest time, it would not build boost until 5500 RPM's, there was no pre turbo exhaust leak so I figured that it was because I needed a 3" downpipe and 3" mandrel bent exhaust. So after obtaining those two items and putting them on the car, I ran an open dump tube. Started the car right up and noticed that exhaust was flowing right out of the dump tube, so there was a pre turbo exhaust leak. My wastegate was missing a fire ring / valve seat cover. I went ahead and purchased a new wastegate to obtain the ring. Then I was building boost at about 3500 RPM's but the spring inside of the wastegate was 15lbs and I'm tuned for 10. Nevertheless, when I hit boost, the turbo flutters, and I don't think that it's getting enough fuel. I went ahead and swapped the spring from my old wg to the new one, which was a 4lb to see if it would fix the problem. So now I'm building 4psi and the turbo is still cutting out and when I turn the manual boost controller up to 10psi, it still only hits 4.. I really don't want to keep doing a trial and error because I'd hate to blow the engine. I have dsm 450 injectors also.

Any ideas Honda-Tech?

ChingaDEboost

what map you got

Adrenaline XXIV

One from Chrome that my brother tossed in there, the map is fine though, I've had 3-4 people check it out.. it's getting plenty of fuel.

0mtber

iTrader: (2)

You can't just "look at a map" and assume it's "good".
You need to install a wideband oxygen sensor gauge to monitor the air fuel ratios.
Your problem could be too much fuel, too little fuel, the wrong plug gap along with other things.

accord_raffi

Are you sure you don't have a boost leak in your intercooler piping or couplers? Maybe your bov/bpv is sticking open. Also, where is your boost gauge reading boost from?

effin

iTrader: (1)

agreed every setup is different. Looking at a map and sayin its good..... no sir. no sir no sir

Adrenaline XXIV

Okay, i'll see what the A/F ratio is. Is it possible that I have a stock fuel filter and fuel pump with about 190k miles? Would I need to jump up to a Walbro 255?

I'm positive it's not a boost leak, it seems to me like it has to be a fuel issue at this point.

Gunmetal_B20_Hatch

iTrader: (9)

stock fuel pump and a CLEAN filter is OK for your setup. The OEM pump is good for about 200whp.

Where are your vacuum lines for the WG going to? What do AFRs look like under boost?

0mtber

iTrader: (2)

Honestly you need to take your car to a local honda/acura EXPERIENCED dyno tuner & have them figure out your issues.
Posting on a web forum when you have such issues really isn't going to get you far. Especially with no wideband oxygen sensor gauge.