FAST XFI No timing control

C

cylinderhead101

New Member
Joined
Aug 30, 2004
I'm currently running XFI with 2.01. I'm using a Casper's adapter harness to plug into the original Buick harness. Here's where I'm stumped...the car will crank, run, and idle. I've already set up some base timing tables. Crank reference angle is at 10 degrees. The bubble floats around on the timing tables and the laptop shows timing should be moving. I've checked and unchecked the fixed timing box trying to get something to move. My problem is this...the car is running at ZERO degrees timing when I check it with a timing light and IT WILL NOT MOVE no matter what changes I make in the XFI. The XFI shows the timing to move on the table. Also, I can see map voltage and TPS voltage changes in the XFI. The inputs are there. The timing at the balancer DOES NOt correspond with what the timing tables show and will not change with changes in the XFI. It runs at zero and glows the headers. The light is correct. The mark is correct. I've had FAST run diagnostic on the XFI and they state it has no problems. WTH? Anyone have any suggestions before I buy a box of matches. LOL
 
I had this happen several years ago and the board had a problem.


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Bison, thank you for the response. How did you get the problem corrected? FAST tells me there's nothing wrong with the XFI unit. They ran a diagnostic and sent it back on 3/11/16. I'm leaning toward something with a processor/board too. I cannot get them to repair what they don't recognize as broken. Any suggestions or contacts?
 
cylinderhead101 said:
Bison, thank you for the response. How did you get the problem corrected? FAST tells me there's nothing wrong with the XFI unit. They ran a diagnostic and sent it back on 3/11/16. I'm leaning toward something with a processor/board too. I cannot get them to repair what they don't recognize as broken. Any suggestions or contacts?
Click to expand...
FAST is likely wrong. They sent mine back twice telling me it was ok. The 3rd time I sent back i told them to look harder and test with Buick DIS ignition strategy. The box needs to be run in Buick DIS mode or the problem won't happen.


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Are you sure it's zero degrees timing and not a few degrees more? It shouldn't be possible to drop below whatever the crank trigger (crank reference angle) is at. Also, check your EST wire. If that is broken, your timing will be fixed real low
 
Fwiw mine was stuck at the base timing not zero


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Check continuity from the EST wire (tan/black) in cavity B of the coil module to the A connector in the XFI, cavity 15. If that wire is not connected properly, your timing will sit still, and your headers will glow bright red after a pass. Ask me how I know.....
 
I will check the EST wire today. I've double, triple, re-checked the timing at the balancer but I will check it 50 more times if it gets me to a solution. My 23 year old son has a Camaro with a fairly hot LS. He's starting to talk a little too much noise. I'm looking to get my ride back in shape so he can see how old school does it. I'm not looking too sharp right now. LOL Thank you gentlemen for your input. It is GREATLY APPRECIATED!
 
Did you get this resolved? Was it a bad connection on the EST wire? If that didn't fix it, be sure to check the software/firmware match. If you're using 2.01 software, then you need XFI2_9d firmware.
Thanks,
Kevin
 
with an xfi, I think a bad connection on EST would more likely cause a stall. A bad connection on the Bypass signal would cause the timing to stay at 10 degrees. (or whatever the balancer is aligned to, but 10 degrees is stock)

Bob
 
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