Startup problem with maft-pro

Cale

New Member
Jan 6, 2008
53
0
0
Ängelholm, Sweden
hello people!
i have everything installed, boss 61 turbo, 720cc injectors, fpr, walbro and more. the maft is installed with lc-1 and i tried to start the car today. it fired up immediatly but then dies after 2 seconds... then i whait a few seconds and start up and same thing again... fuel pressure at about 40 psi..
im totally clueless so please help me out!
//Cale
 

Cale

New Member
Jan 6, 2008
53
0
0
Ängelholm, Sweden
hello dr.
im running the 4.40 version that it came with, shouldnt it be working wit`h that?
the setting is exactly as supra quick setup the only thing ive tried to change is mainscale but that doesnt do any difference.
both lc-1 and maft is wired as showed in manual.. and the lc-1 calibrated perfectly. i was thinking a little and maybe its running on the cold start injector but not on the 720's?
after crank the lc-1 shows about 7.6 afr and maft the same. everything seems to be as it should be... could it be to big injectors maybe?
thanks for help
 

Cale

New Member
Jan 6, 2008
53
0
0
Ängelholm, Sweden
drjonez;889050 said:
interesting.

have you checked that you have fuel press the entire time during startup and running?

how much have you adjusted mainscale?

Yes fuelpressure stays at about 40-45 psi last time i tried...
ive tried to change the mainscale from 0.0 to -64 in 10 steps each time... i unplugged cyl6 spark plug and i smelled gasoline and it was wet..
i have also tried to move the cps up n down but that dont make any change... noticed earlier today that the igniter wasnt tightened and when i did tighten it the car fired up like before but for about 2 sec longer...
this is really strange i just cant figure out whats wrong... i even dropped fuelpressure to 20 psi but still same... when the key is "on" the translator shows 7.6 afr and lc-1 7.4
any ideas what can be wrong or what i can try to change in maft???
Thanks /Cale
 

drjonez

Supramania Contributor
Mar 31, 2005
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18
the motor city
www.4cefed.com
still waiting on these answers...

drjonez;888511 said:
we'll need more info:

-codes?
-what are the settings in the MAFT pro?
-what software version in the MAFT pro?
-how did you wire the MAFT pro?

what does Fout show during cranking and starting?
 

Cale

New Member
Jan 6, 2008
53
0
0
Ängelholm, Sweden
hello dr!
problem is solved! and it had nothing with the maft to do thankfully!
it was the injector resistor that had bad contact so it just started with the cold injector.
everything is working just perfect except it runs really rich on boost, the lc-1 shows 8,5 af when boosting and maft shows about 7,5!
havent really tried to fine tune it yet cause the motor has only ran for 1200 miles.
well, the car runs great now anyway and the maft seems to be a really nice toy =)
 

Cale

New Member
Jan 6, 2008
53
0
0
Ängelholm, Sweden
well ok heres the update.
for the first stupid as i am i bought those f*** 720cc venom injectors from tlf... bought them before i took the motor out and now ive read much bad things about them! well i gave it a shoot and of course one of the injectors were faulty.. 5 of them showed about 2,8 ohm and the bad one 23 ohms!!!! threw them away and have ordered RC 650cc instead! i think that 650s are just perfect (for me) and over 700 is just too much as Dr jonez says too.