I finally had my car data logged please someone take a look at it and tell whats up with this car thanks !! http://www.yourfilehost.com/media.ph...le=camaro6.csv

 

sorry if its too long

 

anyone?

 

ttt

 

Not sure how many people are going to spend time to review a 9000 line file...

Appears you did not record "cell #". That's sort of important, when looking at the long term fuel corrections. You don't appear to have recorded long term fuel corrections for the right bank. Limits usefulness of the log.

You've got a whacky MAP sensor reading at frame 4737.... its higher than barometric pressure, and may indicate an erratic MAP sensor reading.

Runs extremely rich in open loop.... 900-1000mV on the O2's, until it goes into closed loop in frame 1903. Then it struggles to pull the LT corrections down to lean it out in closed loop. Then at frame 1995 is appears to momentarily drop out of closed loop. Hard to evaluate without the long terms for both banks.

MAP is high at idle, approaching, and sometimes over 80kPa. How big is the cam?

You have constant knock retard, even at idle, after frame 7549. A lot of knock retard scattered all over other places too.

I'll look at it some more when I get a chance, but the lack of cell # and one bank of long term corrections is limiting the value of the data.

 

thank you for the response and sorry for the very long log i really dont know how to shorten it, the cam is 23x 23x lsa 10x but you know how it is on this forum if i expose the le2 cam specs, as for the readings i have no clue what im looking at and how to correct them, everything on the car engine wise is new exept the left driver side o2 i really cant tell if its ignition related because the backfire happens when the car is somewhat warmed up and always happens around 1000 to 2000 rpm range to where it seems to bog down like there is not enough air comming in i really appricate the response what do you think i should do im all ears

 

ttt

 

Ok so i got my car on a second data log after about a week of driving back and fourth to work im still experiencing that hesitation between 1000 to 2000 any ideas guys
http://www.yourfilehost.com/media.ph...le=camaro7.csv

 

ttt

 

You've got to figure out how to save the correct data to the file. This log adds the fuel correction Cell #, but now you've left out the engine RPM. And Right bank Long Tem fuel correction is still missing. Really hard to find a stumble in a specific RPM range when you don't log the RPM.

You still have TONS of knock retard..... 3-4deg at idle and on decel, up to 6deg at WOT, 4-5deg at low throttle. Your MAP is WAYYYY too high at idle 82-84kPa (unless you have some godawful cam). Then there are blips of MAP to 103.3kPa at records #1605 and #3055, while the data on either side of those records is a lot lower. Indicates there may be an erratic problem with the MAP circuit. Since the cam specs are a big secret, ask the person who selected the cam if 82kPa is the correct idle value for MAP. I don't think it is.

It obviously a very heavy breather with over 400GPS air flow at WOT (this is a place where it would be helpful to have the RPM logged). Fuel system seems balanced from side to side, with similar pulse widths left and right. In all Cells the left bank is pulling out fuel, with corrections rangins from 3-4% in low load cells to 10-16% in high load cells. I'm almost wondering if the MAF calibration is correct. Seems like it might be reading too high at high flows, causing the PCM to supply too much fuel, then pulling the fuel back out with the long term corrections. Again, its impossible to do a good analysis of the data when you don't supply the right bank long terms.

Seems like its running a bit on the rich side at WOT with O2 readings above 950mV. That's consistant with the long term fuel corrections being negative. When you have negative long terms, the PCM ignores them, and sets the BLM's at 128, obviously causing it to run extremely rich.

Again, the data logs are really not worth looking at without the correct data. If you don't know how to use the software you might want to ask someone who knows about it to help you.

 

hmm if i add the rpm in the log will it help any fred?

 

Heres the new link with rpm table loaded sorry http://www.yourfilehost.com/media.ph...192camaro7.csv

 

oops wrong file.... http://www.yourfilehost.com/media.ph...845camaro7.csv

 

ok idle speed is about 15 mph and i spoke to bret and he told me that the kpa seems high but he wasnt sure what do you think fred sorry for all the posts but i really want to solve this issue and it looks like everyone iv taken the car to doesnt know jack about lt1s

 

do you think a dyno tune will correct my problem or is it something internal