Topic: split second ftc-1

[moparstroup]

do you know at what point will the computer doesnt see closed throttle as far as tps voltage is comcerned? i tested a yj neighbor and it read .7 volts and mine is 1.0v book says .4 for 00 tj.   it has tip in bog which i can correct by adding fuel but i think i am covering something up, mapping is going great thanks to you and autofill

[sharpxmen]

do you have the stock t/b or a reman, 62mm or 4.0L? Sounds like the position on the tps is off, if the tps is not faulty then you need to adjust the bolt that is the rest for the butterfly lever (but there is a limit at which the butterfly will hit the inside bore, you don't want that - if at that point it still has the voltage off mark then the tps is either wrong for the car or just faulty).

[sharpxmen]

do you know at what point will the computer doesnt see closed throttle as far as tps voltage is comcerned? i tested a yj neighbor and it read .7 volts and mine is 1.0v book says .4 for 00 tj.  

mine is .65 at closed throttle (95 YJ), i found this in the 2000 TJ manual, seems that it's supposed to be even lower than .4 volts

[...] will vary in an approximate range of from .26 volts at minimum throttle opening (idle), to 4.49 volts at wide open throttle [...]

(2000 TJ FSM section 14 Fuel System, page 35).

EDIT:
actually i was wrong, i got mixed up, the .65v was for my Camaro, so i think i know what happened 

just looked in the '95 FSM and this is what it says

This will vary in an approximate range of from 1 volt
at minimum throttle opening (idle), to 4 volts at wide
open throttle.

to me it looks like whoever sold you the TPS gave you the wrong part, what you have is a YJ tps and it's different from the 2000 TJ one and that's obviously part of your problem 

[moparstroup]

stock. i called one of my techs that used to work for me and he thought it was supposed to be about .5 volt and that is what the service manual said also. doubt i can get a full .5 volt out ot the min air rate adjustment screw. will try that today. tried 3 tps sensors and all read 1.0-1.1v. do you remember having to richen up the whole 1000 rpm line up to 0hg to get yours to take fuel when pulling out. i got a snap on scanner today  hopefully i can learn something about this 2000 rpm stumble. atleast find out if its timing or ruel related. feels like fuel cut but i guess a sudden jump in timing could feel the same. wrecked my neon last night so i really need to get the bugs out of this thing now, im running out of vehicles. have a good day sharp

[sharpxmen]

stock. i called one of my techs that used to work for me and he thought it was supposed to be about .5 volt and that is what the service manual said also. doubt i can get a full .5 volt out ot the min air rate adjustment screw. will try that today. tried 3 tps sensors and all read 1.0-1.1v. do you remember having to richen up the whole 1000 rpm line up to 0hg to get yours to take fuel when pulling out. i got a snap on scanner today  hopefully i can learn something about this 2000 rpm stumble. atleast find out if its timing or ruel related. feels like fuel cut but i guess a sudden jump in timing could feel the same. wrecked my neon last night so i really need to get the bugs out of this thing now, im running out of vehicles. have a good day sharp

read my other post, 2000 TJ is supposed to be .26v at idle, 1v is for the YJ tps.

2000TJ tps OEM P/Ns: 4874371, 4874371AB, 4874371AC, 56027942, Standard TH189, Airtex 5S5104

it can't be YJ as the connector is different  so i take that back

[moparstroup]

.26 oh boy now what? i will try a different vendor. that would help my #1 problem of having to dump so much fuel in the vac portion of the 1000 rpm line... i hope. the way it is now it seems like pcm just trims it away and creates the bog again anyway. the other issue is the 2000 rpm thing. feels like you turn key off then back on at 2000 rpm. above ok below ok. i am convinced it is compatability with fcu and pcm. on thing i did after installing enricher just for the heck of it i turned the dial the whole way to 0 and wala it drove right through 2000 rpm but soon it wouldnt idle and i had to disconect it and put the jumper in. (all within 3 min maybe) i will have to learn more about the enricher because i didnt think it would even affect it without going past 1lb boost. there is no way to make the enricher turn on at this circumstance is there? this really concerns me and since you dont have a tj your computer isnt the same as mine and you are the only person i have met that has a similar set up. ive posted questions on 4 different jeep forums but havent got any feedback from anyone who knows anything except for the previous owner of my kit who is having the exact symptom as i did and he couldnt fix it so he sold the kit. it was originally a yj kit. he installed it on a tj only difference i see other than mounting is the difference in pcm's. well i got a snap on scanner yesterday and it shows fuel trim but i cannot see individual cells so its not gonna help me. i do have a code for IAT and it shows stuck at 81 degrees (defalt?) i cant imagine that is causing either of my problems although i know i got to fix it.

[moparstroup]

i created a new topic trying to find someone who has a obd2 tj with turbo or supercharger.

[sharpxmen]

on thing i did after installing enricher just for the heck of it i turned the dial the whole way to 0 and wala it drove right through 2000 rpm but soon it wouldnt idle and i had to disconect it and put the jumper in. (all within 3 min maybe) i will have to learn more about the enricher because i didnt think it would even affect it without going past 1lb boost.

http://www.splitsec.com/technotes/Achieving_Fuel_Enrichment_in_Closed_Loop.pdf

set V1 reference to 1.55v (will kick in at -4inHg) and connect V2 to 5v reference, adjust the O2-1 dial to 90 and monitor the AFR, make small adjustments from there to get to the desired afr.

you should bypass the ftc timing feature to take that out of the way (you can reconnect later).

Fix the tps

what is your AFR and MAP voltage and tps voltage when that 2000rpm stumble occurs?

[moparstroup]

ok here is where i am now. most areas are 3 or under on adaptives combined. the cell with 1000 rpm in the pcm at idle and  initial acceleration afm goes to 16.00 and misses terrible other than that, when its running at idle the short term adaptive is still richening at 11.5-12.0 afm. if you change fcm values to achieve 14.7 in that area it barely runs and wont take throttle and just pours the fuel the short term is +30 .then when you tip in throttle it goes dead lean and misses. so i kept adding fuel to the 1000 line till it would even out short and long term wich was -30short and 30 long and it idles at around12.00 afm. now when you step on throttle you are highlighting  further down the 1000 rpm line closer to 0 vac.in this area it goes from -30 short term to counting positive trying to add more fuel.so after adding more fuel to that area it takes fuel on acceleration but all of this is being accomplished at 11.5-12.0 and exhaust STINKS. once you get out of this cell area afm comes back to bouncing back and forth between 14.2 and 14.9 in closed loop with adaptives at 3.0 combined or less. at 2000 rpm it goes lean and adaptive spikes but doesnt accomplish anything. for that quick moment the afm goes up to 15.0+ then right back to normal. as far as the tps i bought a 3rd tps and it reads like the others used chrysler DRBIII and reset min tps and now it reads .89v and 0 percent . except for idle and 2000 rpm, mapping went just like you said it would and was fairly easy. these two issues defy logic. i emailed split second and they said it sounded like low  fuel pressure issue. that makes no sense. the rest of the map works logically and its not starving anywhere even in boost with lots of room for adjustment. i will get the values you asked for tomarrow and post them







=

[sharpxmen]

so the afr is not bouncing at idle? that means either it's too rich to the point it cannot compensate or for some reason you're in open loop. what's your cell value at 1000rpm and -20inHg (or whatever that is for closed throttle)? the tps issue is weird unless the FSM is wrong, not sure what to make of that one to be honest.

are you triggering any "too rich" or "too lean" correction factor codes?

EDIT:
i might have a TJ tps on a t/b somewhere in the garage, if i have time tonight i'll put 5v on it and see what's the output with the throttle closed.

[moparstroup]

it was definitly in closed loop and pulling more and more and more fuel at tip in worse than idle but idle too if you stab the throttle below 1000 rpm to say 25% it chugs and adaptive goes crazy rich  and this helps take away that feeling of trying to pull out with cold engine with no choke once past 1000 rpm takes off runs fine to 2k then fine after that. check back later test some more today

[moparstroup]

here are some readings today KOEF map 25.7? dont  make sence. tps .96v @0% active cell adaptive +32 baro 29.2
KOER on fcu r4 screen -14 to-15 inches ofvacuum...drb 14-15 inches of vac short adaptive 33 long 33pulse width 8.8 arf11.0 to 11.3
 drove a while then long  term changed from 33 to eventually to -5and short term went to -30 then to +7all in 10 minafr went from 11.0 to 14.5 and now for the first time it pulls out from stop with acceptable afr around 14.5 with no hesitation.couple other cells popped up with crazy high adaptives and when it gets there it runs rough and afr goes down to 11 or so. the only thing i did different is unplugged enricher jumper plug and ran it home in open loop cause it was running so rich then plugged it back in and drove. when i drove home in open loop before i plugged jumper back in, afrs went from 11-12 to 14-15. then like i said adaptives completely changed and it now takes fuel from idle on initial accelleration/. the other thing i noticed is now that it pulls out better at propper afr the boost side is now running around 12.0 instead of 14.5 like it was. maybe i need to run this longer i just didnt think the adaptives would look this erratic early on. one other thingwhen it was running at 33 and 33  yesterday 1000 rpm was running so rich due to adaptive memory pulling more and more fuel but other ranges were looking pretty good.

[sharpxmen]

can you post a screenshot of your FTC map table A (fuel)?

[moparstroup]

I will try, last night i drove for abut an hour. drove it with the jumper in the enricher to eliminate it as a problem. after about an hour all pcm adaptives were at +17 except for idle cell and one other one that never seemed to be higlighted during normal driving. now here is some things that are going on. the off idle tip in hesitation is not fixed. i realized the idle had moved up and it was staying out of the 1000 rpm line thus no hesitation. if i sit and idle for 10 sec or so then idle falls down to around 800 rpm then it hesitates when you try to reaccellerate. at 2000 rpm the map voltage does not vary more than .1 or .2  it was at 19.1 when it happened though it depends how much load is on the engine. the lower the load the les you feel it the higher the load its violent. then some times for no reason the afm will read way rich like drop to 10 or 11 while driving and exhaust stinks. then i would pull the jumper off enricher plug which puts it in open loop then it jumps back up to14.5 or so bouncing around plus or minus .3 or so. this has happenend 3 times. when i plug it back in it seems to work fine. the entire range works well and stays stoich + or - .3 or so as it adjusts even in boost it stays at stoich. i did add 5% because of the +17 adaptives to everything except th 1000 line cause it read 0 adaptive. funny thats were it runs the worst. i believe that change go me closer because the air fuel guage is lit up and cycling very fast and mostly in the middle. another thing is the idle hangs up when leaving off the gas coasting while reading around 13.0 kind of like a dash pot if you know what i mean. then it falls to 800 rpm and afm goes back up to normal range.  sharp is there any way to to richen the 2000 rpm low vac part of the map? running up the number on the fcu does not affect it. it still goes right up to 15+ and jerks. the only thing that changes as far as timing, tps,map voltage is o2 sensor.nothing else shows any significant change.

[moparstroup]

you say bypass timing feature but map b is all 0's so do i need to reconnect crank sensor wire anyway?