GeoMitsu

Hello Everyone,

I had 950CC PTE injectors and suddenly one of them wassquirting instead of spraying/pulverizing fuel, tried to clean them withultrasonic machine but in vain, so I decided to get new ones.

So I bought FIC 850CC low impedance injectors.

The time to get them (three weeks), I installed the stockinjectors and my fuel trims were zeroes.

I’ve just installed the new injectors I tried every suggested values on the net for the latency and scaling starting from Merlin 1.7 to some other values that I found, but in vain, my STFT is always 24.
I checked for air leak ----- nothing
below the last result I reached
FuelTrim_Low 2.34375
FuelTrim_Mid 4.6875
FuelTrim_High 0
FuelTrim_InUse 2.34375
O2FeedbackTrim 24.8046875

If I leave it at idle for some time the FT in use will reach a value above 12
Your suggestions are highly appreciated.
Thanks

GeoMitsu

To all of you who has bought new FIC 850CC, you can find attached the latency and scaling table that worked perfectly for me.

These trims are stabilized for more than 60 Km.
STFT :-2%
MDFT :2%

Scaling 770
Latency:
4.6875-----3.312
7.03125-----2.424
9.375-----1.68
11.71875-----1.296
14.0625-----1.08
16.40625-----0.912
18.6767578125-----0.816

GeoMitsu

To share my experience:
Less black smoke on acceleration with great engine response below are the values

Battery voltage
4.6875
7.03125
9.375
11.71875
14.0625
16.40625
18.6767578125

ms
3.384
2.568
1.728
1.416
1.08
0.912
0.576
Scaling :790


You have to alter the :
Accel Enrich Base vs Engine Temp
91
91
88
50
25
15
8
8

and:
Accel Enrichment
1.234375
1
1
1
1
1.109375
1.234375
1.3359375
1.3359375
1.3359375
1.3359375
1.3359375
1.3359375
1.3359375
1.3359375


And Async Accel vs Coolant Temp Adder (Main)
42
35
31
31
27
25
10
8


Low fuel trim: +3%
mid fuel trim: +3%
Cheers