too rich or small turbo

[eoseitz]

I've upgraded my injectors to 650s because my car would lose power and fall on its face when it reached about 18 psi. So I put in a high flow fuel rail, fpr, and fic 650s. After putting in a keydiver chip that came with my ecu for 650 injectors I took the car for a spin. Car actually had some rich knock at first, but the appears to have worked its way out. I'm assuming the ecu adjusted.

So now its back to doing the same thin. It falls on its face when it hits about 18 psi. The wideband shows the afr is around 10.5 to 11. I'm no longer seeing knock on my logger. I've checked for boost leaks and I don't appear to have anything major. It holds at 20 psi for around 50 seconds. What should I try now?

 

[eoseitz]

I just remembered. I running a 14b turbo. Could I be maxing out the turbo? Maybe I should upgrade to a 16g

 

[viperlp01]

does it buck kinda or miss... What is your gap and plug wires

 

[dylnwit]

Have you put in a bigger fuel pump? Generally the turbo won't quite cause that kind of issue, boost will just taper off in the higher rpm range, which doesn't sound like what's going on. Your running an un-hacked mas right? From the sounds of it, you were going lean and timing was being pulled before you moved to 650's, or you were over-boosting so far you were hitting fuel cut. Do you have a logger to look at the injector duty cycle?

 

[eoseitz]

It doesn't really buck or miss. It acts more like it's just losing power. Like I lift my foot off the accelerator some. If I physically lift my foot to about half petal when it does this I get acceleration back.

I haven't installed the bigger fuel pump yet. My wideband is reading really rich when it does it though. It actually did even before I switched my injectors out. Right now I have a hacked 1g o2 sensor. I haven't hooked up the 2g yet. I have a log to look at the injector duty cycles. What should I be looking for?

 

[eoseitz]

I checked my logger and my stock 02 sensor reads around .96 when it does this. Also my knock goes up around a whopping 14 at times. I checked the amount of fuel being dumped in and there is way too much. My afr is around 10. I'm guessing I'm hitting rich knock and the engine is retarding timing. How can I fix this. Should I adjust the ecu to see the injectors as larger?

 

[xhackerekx]

u need dsm link.

 

[JDR7919]

Did you try a BLT yet?

 

[rEclipserGST]

I checked my logger and my stock 02 sensor reads around .96 when it does this. Also my knock goes up around a whopping 14 at times. I checked the amount of fuel being dumped in and there is way too much. My afr is around 10. I'm guessing I'm hitting rich knock and the engine is retarding timing. How can I fix this. Should I adjust the ecu to see the injectors as larger?

If you chipped the ECU, the ecu already knows you have larger injectors. What you need to do is pull fuel if you are running too rich. I thought that would be kind of obvious. Do you have a tuning device for fuel? You need a bigger pump and a good tune before trying to push 18 psi. The 14b turbo is capable of seeing 22 psi.

 

[y_munn]

You def need a bigger fuel pump. 190 or 255. And you need some way to lean out your mixture. Whether it be using a Super AFC, DSMlink, or AMS. You need something kid. My boys 14B was beasting 18-20lbs of boost in his 2g. Find out at what RPM its doing it and lean out at that RPM or once you get the SAFC and FP, go get it tuned.