AFC-SplitSecond PSC1 Map Library

[SIBalla23]

I have 440cc injectors on the regular protege ecu too. I still max out the maf at 6psi. They made the car run alot richer but not enough for 6psi. I think my oem fuel pump can't keep up. Its the original with 104k on it. I did buy the walbro pump, just waiting on time to install. Has anyone used the 440c injectors, regular ecu with oem fuel pump and have had success? Or has everyone already upgraded the fuel pump??

 

[cougar10agREDUX]

I have 440cc injectors on the regular protege ecu too. I still max out the maf at 6psi. They made the car run alot richer but not enough for 6psi. I think my oem fuel pump can't keep up. Its the original with 104k on it. I did buy the walbro pump, just waiting on time to install. Has anyone used the 440c injectors, regular ecu with oem fuel pump and have had success? Or has everyone already upgraded the fuel pump??

im running the stock fuel pump on a t3/t4 @ 11psi. 76k miles. clean ur MAF. check your fuel pressure. you should not be having any problems with 440's at 6psi. you may need to replace ur FPR

 

[SIBalla23]

Yes I should ck fuel pressure. I really need to buy a fuel guage. The car rides normally out of boost and even up to 5psi it good. Once it gets past that and in higher rpms, thats where it gets lean.

 

[rooster]

Yes I should ck fuel pressure. I really need to buy a fuel guage. The car rides normally out of boost and even up to 5psi it good. Once it gets past that and in higher rpms, thats where it gets lean.

are you sure the ssafc is clamping the o2 sensor at the right point?

if not the car will stay in closed loop and the lack of maps on the higher psi on the stock ecu will result in lean conditions.

I'm running it on the atx ecu with 440's and have my values down to 8 and still and having pig rich conditions.

 

[cougar10agREDUX]

what is your "output b" set to on your MAP? have you tried resetting your ecu and then retuning it? if your fuel trims are pulling too much fuel then u have to compensate on the AFC. but if you can pull more fuel on the AFC it'll lower the MAF voltage the ecu sees. if that does't work then i'd say def check your fuel pressure. either ur pump is toast, the filter is clogged or your FPR is shot.

did you buy the wrx injectors used? how many miles are on them?

BTW when i was running the regular ECU i had ouput b set to over pressure, and pressure=0

 

[SIBalla23]

Wrx injectors were bought used but had them professionally cleaned and flow tested by injector rehab. Once I installed them, the car was running very rich out of boost and even in boost except for that higher psi. I had to compensate by tuning closed loop, leaned it out a tiny bit and also tuned while in boost to lean it out. Did that up to about 4-5psi in all rpm. But one I reach 5psi going on 6psi at about 4500 rpms and higher it leans out into the 13afr. I will check my settings now, give me a sec with that. We really don't have external filters, its all built into the pump assembly.

 

[cougar10agREDUX]

Wrx injectors were bought used but had them professionally cleaned and flow tested by injector rehab. Once I installed them, the car was running very rich out of boost and even in boost except for that higher psi. I had to compensate by tuning closed loop, leaned it out a tiny bit and also tuned while in boost to lean it out. Did that up to about 4-5psi in all rpm. But one I reach 5psi going on 6psi at about 4500 rpms and higher it leans out into the 13afr. I will check my settings now, give me a sec with that. We really don't have external filters, its all built into the pump assembly.

you can buy the strainer filter for like $10-15 and replace it.

what are the values on your maps at that pressure?

 

[SIBalla23]

output b is set to over pressure. over pressure is 1.1. There are other settings listed for fuel pump but I never adjusted it because the instructions and how to on here never said to.

 

[SIBalla23]

I know something has to be wrong because from 3psi and up I have the map cells in the 11s and slowly going up to 12.5 as boost goes up. From like 3 to just about 5psi my afr stays in high 11s to 12.5 and then higher the boost afr goes to 13s. I feel like its not getting enough fuel thats why its lean. Thats what makes me feel that the pump cannot keep up.

 

[cougar10agREDUX]

I know something has to be wrong because from 3psi and up I have the map cells in the 11s and slowly going up to 12.5 as boost goes up. From like 3 to just about 5psi my afr stays in high 11s to 12.5 and then higher the boost afr goes to 13s. I feel like its not getting enough fuel thats why its lean. Thats what makes me feel that the pump cannot keep up.

yeah you are def losing fuel. you can test the flow of the fuel pump by extending the fuel line into a measured container and jumping the fuel pump, just make sure you have the batt hooked up to a charger to keep voltage constant at 13-13.5v.

get a vacuum pump and check the FPR,

o go the easy route, and replace the pump and see if it fixes the problem

 

[SIBalla23]

I have just checked the service manual it states nothing about checking vacuum reading at fpr, only fuel pressure. Have any fuel pressure tester kit to recommend since I need to buy one?? The regulator only really keeps the system from over pressure. Correct me if I'm wrong. I might think the pump is clogged just enough to mess me up or that its on its way out and cannot meet up to the high demand of the injectors.

 

[cougar10agREDUX]

I have just checked the service manual it states nothing about checking vacuum reading at fpr, only fuel pressure. Have any fuel pressure tester kit to recommend since I need to buy one?? The regulator only really keeps the system from over pressure. Correct me if I'm wrong. I might think the pump is clogged just enough to mess me up or that its on its way out and cannot meet up to the high demand of the injectors.

the fpr is hooked up to vacuum, the more vacuum the more it's open. theres also the "PRC solenoid" between the FPR and the manifold. could check to see if thats good. if it's not working the FPR may not see vacuum.

 

[SIBalla23]

But if the regulator was not seeing vacuum or not getting correct vacuum, then I would think out of boost driving would be affected especially the closer I get to 0vac.

 

[cougar10agREDUX]

But if the regulator was not seeing vacuum or not getting correct vacuum, then I would think out of boost driving would be affected especially the closer I get to 0vac.

you have 440's the ecu is probably compesating. it's worth a shot

BTW i edited my last ost about the PRC valve

the service maual has all the tests if you want to do those. if not you can just start replacing parts.

 

[SIBalla23]

I know many of times I have let the gas go down to almost empty before fill up so whatever crap in the gas tank could be clogging. What you mean compensate??

 

[rooster]

siballa

what is your pwm mode set to?

I had tested mine under all the options for pressure

Pressure -2-23psi 2.5VDC FS is the option you want to use.

I was using the -2-23psi 5VDC and the car would always run rich. no matter what.

with the 0-30psi, I got tonnes of hesitation under either 5 or 3vdc settings.

i have output B under pressure and set at 1psi as that's atmospheric pressure so for sure the ecu will have maps for that.

Have you tried resetting the stock ecu by pulling power?

 

[rooster]

I know many of times I have let the gas go down to almost empty before fill up so whatever crap in the gas tank could be clogging. What you mean compensate??

the ecu will change Long term fuel trims because of the 440s and will basically learn to use the 440's when in closed loop.

 

[SIBalla23]

I rather not just start replacing parts. If I did that on my job I would have been let go along time ago. I figured I would see if anyone had the same issue first. I only bought the pump because for some reason my gut instinct is telling me it is due to the age of the pump and how I let gas get low sometimes. But I rather test first if I can.

 

[SIBalla23]

pwm is set to pressure 0to30 psi/ 3 vdc fs

 

[cougar10agREDUX]

if the fpr isn't working properly, the ecu will compensate for the reduced fuel pressure by increasing the duty cycle of the injectors, and since your running 440' the ecu won't notice much of a change so it won't throw a code.