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Problem connecting to FAST XFI

12K views 15 replies 7 participants last post by  tmack  
#1 ·
New install of the fast XFI. All power and gound connections are good and the ECU shows to be powered on. Made an adapter to allow connection to the cal port connector on the fast harness. Red wire from fast harness to pin 3 of the comm cable, white to 5, black to 2. I have double checked this cable, also made another cable. I've tried two different computers, one that required a USB adapter and another that has the DB9 comm port right on the laptop. Regardless of what comm port I select in the fast software or in the device manager of the laptop I cannot connect. If the fast is powered up and I try to connect I get incompatable device error. If the fast is off I get ECU not found. I'm using the 1.340 version of fast software and was loaded from different sources on each laptop. On the compter with the USB ports and driver it works fine connecting to my MSD box, as does the old laptop with the DB9 comm port. The fast ECU was recently tested. :peeing

Any help will be appreciated,
d barbaree
 
#2 ·
New install of the fast XFI. All power and gound connections are good and the ECU shows to be powered on. Made an adapter to allow connection to the cal port connector on the fast harness. Red wire from fast harness to pin 3 of the comm cable, white to 5, black to 2. I have double checked this cable, also made another cable. I've tried two different computers, one that required a USB adapter and another that has the DB9 comm port right on the laptop. Regardless of what comm port I select in the fast software or in the device manager of the laptop I cannot connect. If the fast is powered up and I try to connect I get incompatable device error. If the fast is off I get ECU not found. I'm using the 1.340 version of fast software and was loaded from different sources on each laptop. On the compter with the USB ports and driver it works fine connecting to my MSD box, as does the old laptop with the DB9 comm port. The fast ECU was recently tested. :peeing

Any help will be appreciated,
d barbaree

Red goes to pin A (C-27 on ECU)
White goes to pin B (C-29 on ECU)
Black goes to pin C (C-28 on ECU)
on the com cable to the 9 pin serial connector.......:rolleyes: You're not trying to wire the 9 pin serial connector end are you?
 
#3 ·
Red goes to pin A (C-27 on ECU)
White goes to pin B (C-29 on ECU)
Black goes to pin C (C-28 on ECU)
on the com cable to the 9 pin serial connector.......:rolleyes: You're not trying to wire the 9 pin serial connector end are you?
I took a DB9 cable and cut one end off. found the 3 wires coming from pin 2, 3, and 5 of the other end of the cable. The DB9 end was not modified and the other end now consist of three single wires that I plug in to fast harness (wires you mentioned above). According to the diagram I found, the cable I made should work. Someone told me I may have software or firmware problems????
 
#5 ·
Like NoAir said, getting an "incompatible device" message generally means the firmware in the ECU is out of date and needs to be updated. The ECU would have to be well over a year old since I haven't seen this issue in quite some time.
 
#6 ·
If everything above checks out try unistalling and reinstalling the USB adapter and going to the latest version of software. I have seen numerous problems with USB drivers. Make sure its an FTDI chip USB converter to. Its a real high quality piece and works well.
 
#7 ·
If it does say "incompatible device " then there is a Firmware to Software compatibility issue.

If you cannot get the ECU to connect then I would do the same as collins suggested.....

If you installed the USB to serial cable driver software with the convertor hooked up then the PC will not recognize the adaptor until you remove it and reinstall it into your USB port.


Hadley O.
 
#8 ·
NoAir got me lined out. I flashed the ECU and that cured the connecting problem.
I do have another small problem though. I've got the engine running but despite selecting SEFI it seems to be running in bank to bank. I use a crank trigger, and use a MSD didtributor for the cam reference with 1 reluctor blade that triggers at approx 80 deg before TDC. I selected SEFI, Alpha N, IPU ignition, and have my crank reference number within a degree or two. During crank and run the box shows to be firing 4 injectors at a time. Any ideas??

thanks for the replies

d barbaree
 
#9 ·
NoAir got me lined out. I flashed the ECU and that cured the connecting problem.
I do have another small problem though. I've got the engine running but despite selecting SEFI it seems to be running in bank to bank. I use a crank trigger, and use a MSD didtributor for the cam reference with 1 reluctor blade that triggers at approx 80 deg before TDC. I selected SEFI, Alpha N, IPU ignition, and have my crank reference number within a degree or two. During crank and run the box shows to be firing 4 injectors at a time. Any ideas??

thanks for the replies

d barbaree
Did you ground the unused distributor and crank digital signal leads like it said in the installation guide? The ones in the hall effect connector? Try that then double check that it's actually is in SEFI, remember you have to click apply to set it. To checkit you will have individual cylinder timing and can check that by putting 10 degrees of retard into cylinder #1 then raising it from idle and see if the timing drops back 10 deg. :rolleyes:
 
#12 ·
During cranking the XFI will be in bank to bank...even if you lose cam signal it will still fire sequentially , it will just not know what cylinder is # 1. That is an odd accurence you have there. When you select SEFI are you hitting apply and then ok or just hitting ok ? In the past we have seen people just select ok and the softare does not make the change. If that isnt the case you will probably have to send the box back in for a check-up !!!


Hadley O.
 
#15 ·
I sent my FST-303000R ECU to FAST or COMP Cams in Memphis, Tennessee to look over because I had used low impedance injectors. The ECU didn't have any serious problems just an idle issue. All the LEDS were the light green color, No LED's were blinking. I just wanted them to look it over just so I wouldn't have any worries. About 2 weeks after they had received it I receive an email saying "As we expected your ECU is fried, all you can do is use it as paper weight so were just going to trash it. They have stated it is not repairable and they cannot warranty it. If you want to replace it it will cost you $1200.00." All I could say was what in the fk are they talking about. I told them Do Not through my ECU away it cost me almost $1800, I want my ECU returned to me. I get back plug it in and I see the crank LED is blue and blinking super fast, I looked it up and found out a blue LED blinking real fast means a defective ECU and I have no idea what to do with it.
 
#16 ·
I finally got it all wired up, I go to try and connect to my box which is parts number 301000 and it says incompatible device. Then i go to flash ecu and it says "communication failer on com5". Iv been on the phone with them 4 times and they have not given me any ideas i havent already tried. it is an older ecu, does anyone have a clue on what i need to do if iv got to wait on hold one more time for 40mins im ripping it out