880's running rich

[dan2288]

I have a set of PTE 880cc injectors along with a stage 3 keydiver chips set up for 880cc injectors, but It still seems to be running rich with a stock fuel pressure. Can I adjust my afpr so they act like smaller injectors? Where would I set the fp so that they act like 800cc injectors? I read that PTE injectors run low so I will see if that helps.

 

[TuRBoTaLooN]

First step is to make sure your fuel pressure is around 43.5psi for a 2g.

What does your wideband read? Or how do you know it's rich? Do you have any other tuning method aside from the keydriver chip?

 

[GSX93DSM]

You need to get something to fine tune it with like an afc. I have the same set up except 750's and stage 3 keydiver. I have the afc leaned out 3% to help it. Without that it will be hard to tune it.

 

[dan2288]

I dont have wideband. But whenever I let off the gas, It has a poping sound from the exhaust. Thats why I think its running rich.

 

[GSX93DSM]

What type of tuning hardware do you have?

 

[dan2288]

Just the chip

 

[GSX93DSM]

I would suggest you buy safc as soon as you can. Alteast you can tune someway.

 

[dan2288]

I cant just adjust the afpr and see if that helps?

 

[GSX93DSM]

Too be honest;since you really have no way of tuning. I would put the stock chip back in it ,and stock injectors. Place the fuel pressure to stock and wait til you have something to tune with.

 

[toofast82]

Too be honest;since you really have no way of tuning. I would put the stock chip back in it ,and stock injectors. Place the fuel pressure to stock and wait til you have something to tune with.

this is what i would do too.
"thinking" the car is rich, and "knowing" are two different things.

Get a wideband, logger, and simple piggyback device(safc,maftgen2,etc) and then you can easily tune your new setup with great results

 

[snowborder714]

Also, are you sure you have no exhaust leaks/bad gaskets?

 

[dan2288]

not sure about the exhaust leaks, but I will check.

 

[habitatguy187]

Boost leaks will also make you run rich. Have you checked your o2 sensor? Plugs/wires? Just because you're running rich doesn't mean that it's the injectors.

If all that checks out then I would turn down the fuel pressure and see what happens, as long as you turn it down in very small increments you shouldn't hurt anything. But as stated above, tuning software/wideband would be very helpful.