Stumble on fast acceleration
Make sure your fuel pressure is not dropping when you stab the Throttle. No amount of adjustment would fix that.
Easier said than done unfortunately. Right now, it cost prohibitive to put an in-cabin FP gauge in. I will start logging data tho. See what that has to say.
Quote from texcuda on February 15, 2019, 5:15 pmEasier said than done unfortunately. Right now, it cost prohibitive to put an in-cabin FP gauge in. I will start logging data tho. See what that has to say.
One of my biggest complaints. No fuel pressure data.
Cheapest way is to get the Fitech $10 gauge and tap one of your fuel rail plugs. You can staff the Throttle in park and watch....
I had Speed Hut build me a gauge that has the website printed on it. One day I may be able to offer an affordable electric FP gauge. Speed Hut is interested....
Quote from Austin DeHaas on February 15, 2019, 10:56 amQuote from henry.ss on February 15, 2019, 5:16 amQuote from Austin DeHaas on November 13, 2018, 11:29 pmMessage it to me on Facebook. I'm under the same name. Then I will post on the forum.
hi
i have same problem
but i increased accel pump to 99 and fast accel to 99 and for dfco return fuel 150
after changing these parameters my car hesitation a lot of better and lower but it is still remains
whats your opinion for me ?
my car is impala 77 L6 250 TH350 2.73 final Drive ratio and stock components .
tnx
What is your AFR doing when it stumbles?
i think about 13
Quote from henry.ss on February 16, 2019, 5:40 amQuote from Austin DeHaas on February 15, 2019, 10:56 amQuote from henry.ss on February 15, 2019, 5:16 amQuote from Austin DeHaas on November 13, 2018, 11:29 pmMessage it to me on Facebook. I'm under the same name. Then I will post on the forum.
hi
i have same problem
but i increased accel pump to 99 and fast accel to 99 and for dfco return fuel 150
after changing these parameters my car hesitation a lot of better and lower but it is still remains
whats your opinion for me ?
my car is impala 77 L6 250 TH350 2.73 final Drive ratio and stock components .
tnx
What is your AFR doing when it stumbles?
i think about 13
I need more than that. A stumble is either a lean AFR or rich AFR. Not "I think" AFR. 😁
Send in a Datalog of the stumble.
Quote from Austin DeHaas on February 16, 2019, 7:29 amQuote from henry.ss on February 16, 2019, 5:40 amQuote from Austin DeHaas on February 15, 2019, 10:56 amQuote from henry.ss on February 15, 2019, 5:16 amQuote from Austin DeHaas on November 13, 2018, 11:29 pmMessage it to me on Facebook. I'm under the same name. Then I will post on the forum.
hi
i have same problem
but i increased accel pump to 99 and fast accel to 99 and for dfco return fuel 150
after changing these parameters my car hesitation a lot of better and lower but it is still remains
whats your opinion for me ?
my car is impala 77 L6 250 TH350 2.73 final Drive ratio and stock components .
tnx
What is your AFR doing when it stumbles?
i think about 13
I need more than that. A stumble is either a lean AFR or rich AFR. Not "I think" AFR.
Send in a Datalog of the stumble.
i understand
my job is tuneup repair shop and fully understand this important section but i forgot how much that !
for datalog i havent datalog on my micro sd card directory !
but datalog was turned on and after testing my car in final i did log off button then i checked it later but i cant find anything about datalog on my handheld memory
Henry.SS, you must hook the handheld to your laptop to see the datalog files. Plug in, tap USB storage on handheld, then your files will show up on the laptop as another Drive.
Quote from Austin DeHaas on February 16, 2019, 10:35 amHenry.SS, you must hook the handheld to your laptop to see the datalog files. Plug in, tap USB storage on handheld, then your files will show up on the laptop as another Drive.
i know but i removed memory from handheld and i insert that to ramreader but in memory directory there was no folder "datalog"
again i connected handheld with usb cable to my pc but again a folder called datalog is not here .
Quote from Austin DeHaas on February 15, 2019, 5:41 pmQuote from texcuda on February 15, 2019, 5:15 pmEasier said than done unfortunately. Right now, it cost prohibitive to put an in-cabin FP gauge in. I will start logging data tho. See what that has to say.
One of my biggest complaints. No fuel pressure data.
Cheapest way is to get the Fitech $10 gauge and tap one of your fuel rail plugs. You can staff the Throttle in park and watch....
I had Speed Hut build me a gauge that has the website printed on it. One day I may be able to offer an affordable electric FP gauge. Speed Hut is interested....
Engine load won't have a dramatic effect on FP? I think I'll do this regardless tho. Thanks Austin!