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Ah, good idea, hadn't thought of logging without the TPS. Yes, the MPH read-out seems goofy as well. See my other thread on a request for calibration help (i.e., what are the numbers I need to insert in FAST). Is it normal for the MAP to go up about 4-5 kPa when the engine compartment is hot...

Here you go. I logged "Raw TPS Volts". Note the X axis (horizontal) is marked in 5 second increments. I did not take my foot on and off the throttle that many times in a 5 sec period. All of the lowest parts of the graph equal 0.45volts, which is equal to 0% TPS. The signal did not "go...

Nascar83Fan - This is a FAST XFI ecm. The idle and WOT voltages can either be auto-calibrated or manually calibrated by graph in the XFI. It's not like the stock ECM where you had to set idle at 0.44'ish (that's just where this one ended up). The TPS was bought new on Friday to replace the...

Nick - I could understand that, but to drop back to exactly my 0% voltage of 0.43? That makes no sense, but then again, somethings on this evil possessed POS make no sense. Ramin

Bought a new TPS because the old one appeared to be "dropping out" intermittently on a 20 frame per second log. It would go from some open % TPs down to zero and back up again, every few seconds. Installed the new one and it does the same. Logged RAW TPS V to see if the signal to the ECM was...

How many pulses per driveshaft rev do I need to enter?

Wow, that went fast. Nice car, good price.

Thanks, I will contact FAST. I am going to make a new post asking about the Lambda vs AFR wierdness.

C-Com software is version 1.340. FAST box is the red XFI (not the 2.0). I had a good friend look at that log and he noticed some things, which I reconfirmed today with another cold start to warm up/closed loop idling recording: (1) In open loop, as startup enrichment decays and it warms up, it...

Can I run the 2.0 software with the "1.0" hardware?

I did a whole cold to warmup log. Log and cal files attached (need to increase the log time to 10 or 15 min as 5 min was too short). I feathered the throttle for about the first 30 seconds. It idled OK. Needs tweaking. Something else is going on after closed loop, but did not show up on...

I'm helping a friend get his car running again. Two different people have had their hands on this to tune it. Neither were able to nail down the tune due to fuel system problems which they failed to consider or diagnose; I think they simply crutched the root of the problem with the tune...

Thanks all. Its a larger throttle body. I got it to idle ok now from cold start to warm up. It's not great, but it's a start. I am at 1000rpm, IAC counts in the mid-20s. That's in open loop. But it seems to like AFR of around 8:1 (E85). That's way too rich, but if it likes it there, who...

I know part of my current battle with idle control is this "big" cam, coupled with ported heads, and 120# inj with E85. I am working my way to getting the throttle blades open enough and conversely the IAC counts low enough (10-20) for a controllable and decent idle, but it got late and gave up...

To subtract even more confidence from the prior mechanic's tune: We found that the original installer left the IAT sensor in its original spot as a MAT sensor. One of the things on the to-do list is to weld a bung to the up-pipe and relocate it. Power Adder will be left unchecked now in...

Sraight E85 full time. There is nothing on the car that would require PA. Just another one of many indicators that I should not place a whole lot of confidence in the prior calibration files. Thanks guys.

Here you go. I think these are the right files. (You'll see some screwy things in my opinion, but I'm new to EFI, so not sure. But for sure, both tunes ran like crap. I believe both cal files are inadequate and should be thrown out the window, because while tuning on both, the fuel system...

Both Chuck. Do I need to zip the file to attach it? I will attach 2 files, one from the original tune, and one from a later tune which someone started mucking with the original. At this time we are just trying to get the car street drive able (not worried about WOT yet). Both of those tunes...

Do you guys use this function for any WOT purposes in (single pump, no alcohol injection)? I am trying to figure out if someone just copied a prior calibration file over to my buddy's car as a baseline tune from a known good tune of a similar combo, but just forgot to uncheck the Power Adder.

Where is this guide you speak of? Been staying up til 2a this week after everyone in the house goes to bed...soaking up all the info in the FAST manual and various websites & forums. Must've read the manual 10 times, and each time I learn something totally new that I missed before.