Funny how the most simple of things are overlooked.

I'm now getting a problem, as soon as the AC compressor kicks in my engine almost stalls. It's like the compressor is putting too much load on the car, I can even notice it at cruise.

I need AC where I live at 95F and 98% humidity

 

Can't you bump up the AC idle?

I'm pretty sure I just did that last weekend. Car doesn't feel like it wants to stall anymore in very hot weather.

 

Sorry to jack a solved thread

I don't want to adjust anything to fix the problem until I know for sure the AC system is OK- don't want to band-aid symptoms of a bigger problem.

I also just noticed my belts are starting to show wear (48,000 miles) , I guess it's getting to be that time. But $200 for timing belts and serpentine, plus the broken knuckles I'm trying to put this off until Fall

 

Well, I thought that the loose clamp was going to solve the problem, but it did NOT

Yesterday I did 4 logs (2 @ noon and 2 in the evening), the AFR looked ok, albeit, the evening logs had an ever slightly richer AFR.

Today I did 2 more logs @ noon and the AFR was significantly richer than in the same 3000-6000 section as before.

I check the fuel trims with Mitsulogger right after and I find that the FuelTrim_Low has hit 9 again.

I flash the ECU with the same flash, but the software tells me that it is the same flash in the ECU as the one I am trying to flash. I check the FuelTrim_Low and it is still @ 9.

I do another log after that and I get the same rich AFR section as before.

So I pull over and flash the car with a similar flash, Not the same flash.

I do a log and the AFR goes normal again. I check the FuelTrim_Low and it is at ZERO.

So now I know that if the fuel trim is @ or close to zero, then the AFR is unaffected, but if the fuel trim climbs to 9, then I get this rich section in the AFR.

The question is, what do I have to do to keep the FuelTrim_Low @ zero? Should I re-scale my stock injectors? What would I set them @ from the 513?

 

cj I can't help with your problem but am interested in knowing what is happening.

am I correct in saying, when the trims get big your cruise goes way below 14.7? same with idle?

to be clear, when you are at wot your afr is what you want or does that change too?

best guess is something is still wrong with the intake system. maybe the maf sensor has been corrupted or your iat or coolant sensor is corrupted and go to ground ...no check engine lights? are you in a position to get mitsu to check your car?

 

Do you have a rear 02 sensor simulator installed?

 

No, the cruise and idle AFR are @ 14.7. The cruise fluctuates between 14.5 and 14.7. It behaves the same way as my old 8 used to.
When I first flash the car and the LTFT mid and lo are close to zero the AFRs are lean in the 3000-6000 range. Then as the trim go higher, the AFRs become richer in that range.
I will get another MAF from the Junkyard and see if that fixes the problem. I have no check engine light.

 

Are the latency values for your injectors still intact?

 

No, I do not.

 

Yes, they are still stock. But I am thinking of lowering them @ 14v to try and combat this problem.

 

If he did would this have some effect on open loop fueling? I ask because I have the inline perrin sim installed an have been curious on how the system attempts to light up a nonexistant cat and how the egr responds. My egr appears to be sluggish to open in 1st gear due to the part throttle knock that shows up when out of boost (in 1st only)

 

You will need to increase the value to combat this problem. But it's a band aid fix, i wouldn't do it. You should find the reason why you run lean with normal settings, making ECU add fuel through trims. 7 on mitsulogger on LTFT is pretty high. Especially on a stock car. Something's out of order.

 

Swap out the pump if still stock, if that doesnt fix it you still have a slightly better FP and furthermore with a clean filter and know of one more less thing it can be

 

Interesting... I lowered timing and the crossover load to go into open loop, and it quenched most of partial throttle knock. But I still get the some random high counts in first gear when ambient temp is above 90*F. It may be caused by the sim.

BTW this is not good news http://www.usdoj.gov/enrd/Consent_De...er/Casper.html

 

No it is not.

Soon whp will be illeagal.

Irony is I'm quite certain my car emits a fraction of the CO2 without a cat then it did from the factory