LS4 / F40 swap - fieroguru (Page 208/216) pmbrunelle MAY 16, 08:26 AM quote Originally posted by fieroguru: Throttle body opening limit @ zero speed - It can be set from 0-40%. I think this could be used as a simple agressive launch mode. Where I floor the pedal, engine holds x% throttle and x RPM (probably 3500 or so RPM), until I release the clutch. I did something like this with the stock 2.8, but I didn't need to use a clutch pedal switch. Once the tires started rotating (well, the VSS registering movement), that was enough to leave the launch mode and goto normal operation. fieroguru MAY 18, 06:34 PM Ran and drove the car about 6 hours on Saturday. It will idle for an hour in the driveway without temps going over 200 degrees. Was able to get starting, idling, and part throttle tuning roughed in. Still need to spend some time going through some old data logs when it was E67 and E40 to double check the timing in the part throttle/interstate cruise areas. Working on fixing an oil leak currently, planning to have that fixed on by Wednesday, then will put the rest of the interior back. It was really nice to be driving the car again with it's stereo and my tunes! I have missed it! I would like to put 500 to 1000 miles on the swap before the 30th. Trinten MAY 24, 08:06 PM Awesome to hear that it's behaving! Curiously... the 30th... what? HP Tour? fieroguru MAY 26, 10:05 PM quote Originally posted by Trinten: Curiously... the 30th... what? HP Tour? Vince, I am taking some time off starting the 30th, and then the HRPT starts on June 9th. I am registered as a Long Hauler. Another good weekend of progress. A/C hoses made, vacuumed the system for several hours, it held vacuum for several hours, so I charged it up and it works great! I finally have nearly all the wiring done. Just need to terminate the 2 wires for the front wheel speed sensor. I got the CAN network going with the 12 I/O expansion module and the 2 x 4 CAN buttons operational. The speedo was fighting me for a couple of days. The earlier concern about the VSS tooth count being maxed at 50 vs. it needing to be 68 for the 3.091 is a non-issue. There is another way to input the needed numbers. The Rebel LS does not have a speedo output, but I was able to configure a generic output to drive the speedo. Now the GPS, ECM, and Speedo all read 80 mph at the same time. Importing the timing from the E40 was a nice improvement. I did waste about 2 hours chassing a self-inflicted issue. Gettng the CAN network operational left the car unable to go above 10 mph. It would just fall on its face and the A/F ratio would go to 21.x... After loading some prior tunes and checking fueling and timing, it did not going away. Then I realized it was traction control working like it is supposed to. With the front wheel speed sensor disconnected, but traction control turned ON (It is one of the 2x4 CAN buttons and I set it to default to ON so I have to turn it OFF). Well it came ON as soon as the CAN network was enabled and the missing front wheel speed sensor triggered the injectors to start shutting off. Disabling the traction control feature fixed the issue. I drove the car for about 60 miles today. Have to go to downtown Chicago on Tuesday, but not ready to take the Fiero. Wednesday, Thursday, and Friday I will daily drive the Fiero to work. After work I will drive it some more and one night I will do a 150+ mile interstate run to check MPG. FieroWannaBe MAY 28, 10:39 AM Glad you figured out the speed settings to get it to work, are you using the F40 VSS or the wheel average from the wheel speed sensors?. Have you been looking into converting completely to a digital dash setup? Hopefully you are also taking advantage of the closed loop boost control. I have been slowly working on my own CAN to Fiero Gauge cluster driver, which I plan to start with the Haltech CAN, Holley CAN and MSII CAN. It would help free up I/O on the ECU for other controls. fieroguru MAY 28, 01:59 PM I am using the F40 vss for vehicle speed. Currently using the stock Fiero speedo and tach, but wouldn't mind a 8K tach and a 160 speedo. Had digital gauges in my 86 vette 20+ years ago and much prefer the dial gauges. I will be playing with boost control later this summer. fieroguru JUN 09, 04:22 PM On the HRPT! Mswilcher JUN 12, 06:45 PM Love your work! fieroguru JUN 13, 01:13 PM Thanks! Last day of the HRPT: dskebo JUN 13, 01:22 PM When are you going to get the paint shining like it deserves? The car is a labor of love and it should look the part.