I just got finished installing a ltx8 in my s4 and when i start it will run for 10 seconds then shuts off. It will then restart with the same effect. Any suggestions i think i have tps adjusted right but p.o. had an old gm tps on it did he change another option somewhere for that. Im trying to use silverrotors base map as listed and changed no other options he didnt list

 

It doesnt seem to be fuel cut. With the dvom connected it dies and still has batt. voltage to pump for a few seconds after. Is the sweeping tps an add on option that i have to use?

 

Show me the map you used.

Silverrotors map is alittle rich.

 

Everything he posted was used. all other settings were kept. ill get them tomorrow . and yes while its running its very rich smelling but i took fuel out of idle alot and it gave no change to how long it runs. It starts right back up, if was a rich problem wouldnt it flood a bit and be harder to start

 

not necessarily. Show me the map and well go from their.

 

ok before i write map down its a s4 t2 550 pri. 750 sec. stock pump. stock boost with a bit of creep. im gonna only write a few screens at a time because my router is being an ***. sorry

 

screen 1 idle
30 / 1.24
25 / 1.29
20 / 1.38
15 / 1.43
10 / 2.29
05 / 3.48
00 / 4.0
2-20psi / 4.95

screen 8 load

30 / 1.52
25 / 1.48
20 / 1.52
15 / 1.86
10 / 2.05
05 / 2.62
00 / 3.67
2psi / 4.14
4 / 4.48
6 / 4.76
8 / 5.33
10 / 5.95
14 / 6.76
16 / 7.62
18 / 8.55
20 / 9.71

 

screen 17 and 18 all 0

screen 19 pump map
pump 2 start / 2000
pump 1 amt / +10
pump 1 pulse / +02
pump 1 trig / +14
pump 1 stop / 00
pump 1 adv / +05
pump 2 time / +10
pump 2 amt / 30
pump 2 trig / +16
pump2stop / 00
pump2adv / +05
pumpdwell / 3.00
timers / no
pump1sync / no
spare / 00
cold / 00

water screen 20

-25 / 0
-17 / 70
-9 / 60
-1 / 55
5 / 50
11 / 50
18 / 45
24 / 35
31 / 30
38 / 20
46 / 15
60 / 12
68 / 8
82 / 0
99 / 0
124 / 0

air screen 21

-25 / 0
-17 / 70
-9 / 60
-1 / 55
5 / 50
11 / 50
18 / 45
24 / 35
31 / 30
38 / 20
46 / 15
60 / 12
68 / 8
82 / 0
99 / 0
124 / 0

 

screen 22 crank

-25 / 72
-17 / 72
-9 / 72
-1 / 67
5 / 62
11 / 57
18 / 50
24 / 41
31 / 31
38 / 26
46 / 20
60 / 15
68 / 5
82 / 0
99 / 0
124 / 0

screen 23 trpm

500 / 00
1000 / 10
1500 / 15
2000 / 20
2500 / 25
3000 / 25
all the way to 9000 / 25

screen 24 tmap

30 / 00
25 / 05
20 / 04
15 / 03
10 / 02
05 / 00
00 / 00
2psi / -02
4 / -04
6 / -06
8 / -10
10 / -10
14 / -12
16 / -12
18 / -14
20 / -13

screen 26 all 0

 

screen 26 tgap

500 / 15
1000 / 15
1500 / 15
2000 / 14
2500 / 12
3000 / 10
all the way to 8000 / 10

screen 27 tinj

500 / 120
1000 / 150
1500 / 150
2000 / 150
2500 / 150
3000 / 150
3500 / 180
4000 / 180
4500 / 210
5000 / 210
5500 / 210
6000 / 240
6500 / 240
7000 / 270
8000 / 270
9000 / 270

screen 28 all 0

screen 29 aux

rpm off
map off
fan off
fan add .1
fan air .1
air min 10
air max10.52
airafs .1
rpm set 880
pwmlow .76
pwmhi7.62
rpm off
air add .19
enrich 0
timing 0

screen 30

mixtrm / 30
tpscal / +51
timtrim / 0
static / 0
timmax / +27
rpmwot / 7hg
rpmcrs / 17hg
afste / 8
revlim off
revcut off
bstcut off
revstage 3000
mapstage / 5hg
%stage / +50
decell off
dwell / 3.00

 

screen 31

maps normal
config +01cylr
firing seq
load map
dwell time base
input +pos
spark_neg
timing off
rpmon 2500
map on 2psi
sample 0
spare 0
shift 9750
water 92c
air 40c
boost 17psi


screen 32

prog enable
ecu enable char 1-8 mazt
pin 1-6 000000000

 

screen 1 idle
30 / 1.24
25 / 1.29
20 / 1.43
15 / 1.71
10 / 2.29
05 / 3.48
00 / 4.0

From what i can see in your idle map that was too lean. Put the above and should stay on this time.

 

Unfortunately with the new idle map it was all the same. I tried richening and leaning both. After trying to start a few times it did have rpm in the error box but quickly went away. Tach is working temps all look good. It seems to be exactly the same time running whether i start it every 20 seconds or every hour. when its running it seems smooth as i feather the gas. If i just let idle its a bit rough but smooths out before it dies
Any other options would be great before i rip apart my harness that is tapped up and soldered to be bulletproof to check all connections.
I am running stock trailings with no ignitor if that could be the problem even though sopposed to be ok to do. It was a used microtech also so hopefully its ok.

 

The fact that it smooths out before it dies means its going lean just before it shuts off.

Do you have a fuel pressure guage? Sounds like your loosing fuel pressure?

 

it does feel like fuel cut. all i did was measure voltage to pump. ill bring gauge home from work monday. pump was great a week before i wired it up. coincedences do happen

 

config +04cylr

 

Ok forgot the fuel pressure gauge in my box at work. config+4 didnt do much but thanks. Dont know what all previose owner changed.
its definately a fuel issue i measured voltage at pump yet again and redid ground with no change. I did have it running for 40 seconds on carb cleaner so its a weak pump or im loosing injector pulse. I guess my noid lights won be to helpful here so im sure the gauge will tell me what im sure of.
After installing a new ecu and building a harness the last thing you check or thinks the problem is something thats been working great and is not in the vicinity of anything youve done except for the power wire.
One last thing. On screen 31 should my spark be on -neg or ser4

 

-neg

The only way you loose injector pulse is if you LOOSE CAS signal or the ECU switches off.

What happens if you hold the revs up does it still switch off?

How have you wired up the fuel pump?

 

well had the gauge hooked up today and while cranking it shoots to 40 then started the pressure goes down to 10 then shuts off. The whole time getting batt. voltage to pump. My dumb *** overlooked the obvious i just assumed it would be with all the work i just completed.
On another note where is a good spot to get ignition power that doesnt shut off while cranking

 

Ignition barrel.

 

well got the new pump in the mail today and she fires right up. Rich as hell. I have an s4 with walbro 255 and 750 secondaries. Thanks for all the help already but do you have a better base map by chance you could share to get me a bit closer. i would really appreciate it.

 

well it is running. i leaned out the idle to get it smoother but if i hold at any rpm above idle it misses pretty bad but doesnt miss while revving.

 

well i guess its not rich but lean. If i start to get close to 0hg it starts to make an odd noise. im thinking blow off is leaking maybe damaged in the move i just made somehow. Need to find my lc-1 software. the downloadable software isnt working on there sight so i dont know afr

 

Change your LOAD_00HG map to 4.00ms

Should make it better.

Also make your LOAD_05HG map to 2.95 ms

 

You are the man. That made a night and day difference. I need to work on cold start enrichments now cause i can barely keep it goin when cold and the horrible shriek when hitting atmospheric to boost. Damn blowoff isnt leaking. Im replacing manifold gasket and all vacuum caps since they are cracked. I cannot find a vacuum leak but it sure come alive under boost. Also if i hold an rpm st idle it shakes like hell but cruising and heavy or light throttle i have no problems. IM using stock trailings with no ignitors put my power at the 4 like colors and ground to the others. Do you think my ignition sucks. What would you recommend i do.