Digital Dash Cluster (Page 2/3) Chief08 DEC 31, 12:39 PM Looking good. statue4 JAN 04, 09:47 PM So the digital oil pressure always reads at 80 psi when the engine is on, but the stock one is still installed. I'm guessing I will have to replace the oil pressure sending unit with one from a S-10/Blazer/Bravada/etc. for it to work properly. I've been looking into the speedometer and it looks like the ECM & cruise control input is actually 2000 ppm instead of the speedo's 4000. So the stock speedo would receive the 4000 signal from the VSS and then output a 2000 signal to the ECM. I think for this to work properly I will have to send the VSS signal to the digital dash AND to a stock Fiero speedometer so it can step it down to 2000. The stock Fiero speedometer would have to be hidden under the dash somewhere and would only be there so it can output the proper signal to the ECM and cruise control. I wonder if I could disassemble the stock speedometer assembly a bit to only include the necessary components for this. For now it does not matter, since I still need a plastic VSS gear. Does anyone know what the ECM does with the speed info? I've driven it for months without, but perhaps it will run better once I get that sorted. Gas gauge: I know people usually run out of gas when their gauge says 1/4, but mine has been a bit different. Perhaps because I used a generic sender from Summit. With the stock cluster a full tank of gas would read as about 2/3 on the gauge and empty would be way underneath zero on the gauge. With the new digital dash it is accurate at full and zero! Sweet! But I think the float gets stuck in the down position because after I fill up it will not change the reading on the gauge until I hit a pothole or bump. I still need to get some Lexan or something as a faceplate. I don't really see where I will be able to attach it but I will cross that bridge when I get to it. mmeyer86gt/gtp JAN 07, 12:11 AM if you find a 88 speedo there is a post somewhere on here about putting a firebird gauge cluster in a fiero. It has all the points on the board you would need to get the speedo from the ecm to the fiero speedo board then output 4000ppm to the digital cluster but if you turn on cruise or the like the ecm still thinks it is using the fiero speedo as a display so it provides th correct output back to the ecm. I did this with my syclone setup. The oil pressure gauge has to do with the sensor and you might have to put a different sensor on the engine and run a wire all the way to the gauge cluster to work correctly statue4 JAN 25, 06:40 PM [strike][/strike] quote Originally posted by mmeyer86gt/gtp: if you find a 88 speedo there is a post somewhere on here about putting a firebird gauge cluster in a fiero. It has all the points on the board you would need to get the speedo from the ecm to the fiero speedo board then output 4000ppm to the digital cluster but if you turn on cruise or the like the ecm still thinks it is using the fiero speedo as a display so it provides th correct output back to the ecm. I did this with my syclone setup. The oil pressure gauge has to do with the sensor and you might have to put a different sensor on the engine and run a wire all the way to the gauge cluster to work correctly Does it need to be a speedo from an 88 to get the correct input for the ECM? I've got a speedo from a '84 and an '88, but I had planned on putting the '88 speedo on Ebay since it is 120mph. The oil pressure gauge started working fine once I disconnected the original oil pressure gauge. I guess the two were confusing each other. slicknick JAN 26, 02:19 PM Grab a DRAC module from an S-10 or similar to handle all of the VSS divisions and distribution. Plenty of programming info out there, it's all hardware. mmeyer86gt/gtp JAN 26, 02:57 PM yes has to be from an 88 there is a function on that board that the earlier boards did not have. it has to do with the map computer they were planning in later years. mmeyer86gt/gtp JAN 26, 03:06 PM quote Originally posted by jscott1: Well that's a clever wayto do it with a potentiometer and a voltage comparitor. If you are working with the raw wires, then look at the drawing that I have A/C controls connector, (labeled A thru N). What you are looking for is scattered all over the drawing but here is is neatly A - Black -Ground B - not used C - not used D - Tan - Mode door defrost open E - Gray - recirc door open F- Purple - mode door partially open (bi-level) G - not used H - not used I - not used J - Light Blue - Mode door outlet open defrost closed (normal) K - not used L - Yellow- recir door closed M - Red - Mode door outlet open N - Brown - power As for the speedometer board (84 non cruise, 85-88): A - not used B - not used C - not used D - not used E - not used F - not used G - not used H - not used J - not used K - not used L - not used M - 4000 pulse per mile buffered VSS (88 only) N - 4000 pulse per mile buffered VSS (86-87) ?? per Gary W P - black/white - ground R - puple/white - from the VSS (low) S - Yellow - from the VSS (high) T - yellow/black - Ignition power to cluster U - Dark green/white - 2000 pulse per mile Vehicle speed sensor signal to ECM and Cruise I hope that helps?? - Jonathan mmeyer86gt/gtp JAN 26, 03:08 PM i left this board in the dash and just sent pin m to the speedo. that way the fiero just thinks your using the stock gauges. makes it way simplier. fyi i did a syclone gauge cluster install. rbell2915 FEB 11, 07:26 AM I think this would be very cool in a Fiero. statue4 FEB 13, 09:16 PM I finally got the faceplate finished up. I got a piece of Lexan at Home Depot and cut it using razor blade and Dremel. I just used the original faceplate as a guide. I cut the protective plastic layer around the areas where the instrument displays are. I left the plastic over those areas and removed the rest and sprayed it black. I got some thin blue tinted plastic at an art supply store and stuck it on the back with 3M VHB. The Bravada(or Blazer or S-10 or whatever) dash originally has blue tinted plastic over the instrument displays and green over the speedo/odo. I liked the blue so that's what I was trying to mimic. I couldn't just reuse those original pieces of tinted plastic because they were pretty scratched up from me not being careful with them. I have no idea how well it would work if somebody wanted to go for an orange or red tint. The main thing holding it in place is the screw on the left of the three buttons. I also put a few screws in around the perimeter. They don't look perfect, but at the end of the day it is still just a Fiero I got for a couple grand, so I don't mind. I think it looks pretty good. I would prefer if it wasn't quite as shiny, as nothing else in the car is, but oh well. And, for anyone who noticed my warning lights, I did not somehow install ABS. I hooked the ABS light up for door ajar. Excuse the missing interior parts. I'm in the process of making them red. I still do not have a working speedometer. My VSS gear is damaged. I made a 3d model of the red 29 tooth VSS gear to 3d print. Before I got around to printing it I found a local junkyard with a Fiero and it happened to also be a manual. It was a 4 speed instead of a 5 speed so the VSS gear was blue. I got it anyways just to see if my speedo would work at all. Nothing. It got damaged just like the VSS gear I had before. Dang. This isn't just because it was from the wrong transmission, right? I had thought that the VSS gear from a different transmission would still work, but show inaccurate speeds. The transmission just chews them up. To my knowledge, I have to remove and disassemble the transmission to address this. I don't have a decent spot to remove the drivetrain from the car so will just put this off. Within a year I will probably live elsewhere and might be able to remove the transmission (and throw a different engine in while I'm at it). My clutch slips sometimes, so hopefully it lasts until then. I'm considering trying to build something that gets speed from GPS and outputs the pulses that the VSS normally would using an Arduino or something, but haven't done much research on it yet. Of course there would be delay and stuff, but it would be better than nothing.