Okay so after getting rid of megasquirt I changed my fuel system.
I went back to factory ECU with 450cc's and an SFMU. I finally got the SFMU and all the adapters/lines etc. I wired my S-AFC back up and purchased a Velotica FCD as well. I wired the SAFC so that it goes before the FCD before going to the ECU so the S-AFC.
We got it to fire up fine and got the idle pretty good the car would go into boost pretty easily and it doesn't feel like I can make much power when I accelerate. I couldn't find any large boostleaks so I can't figure out why it doesn't seem like its making boost. I can hear a whooshing noise under WOT so I think there is a boost/vacuum leak that is making the noise. Also I didn't adjust the FCD so I don't know if it has something to do with how I wired the FCD which is why it isn't making power.
Okay some stuff to add. I still havent boost leak tested the car but there arent any vacuum leaks for sure my idle vacuum is perfect and it revs to 0 with no load at idle. I did* however notice that my megasquirt water temp sensor (non OEM) was still installed and I must have attached the factory harness to its wires. So my in car gauge was reading perfect but the diagnostic tool reads 250 degrees.
To iterate more a cold start was a PITA to get it running because it needed more fuel and once I got it to run I took some fuel out and it idled perfect.
Now while reving at Idle I noticed the turbo compressor surging and the BOV felt like it wasn't opening when i reved the throttle cable. So Im going to try to run a standalone vacuum line to the BOV because currently its T'd into my waste gate actuator.
For the next time I'm up at my car I will boost leak test and tune the map clamp. Although I did get a map barro code when I turned the car on ????
So anyone have any clue why its compressor surging and if it has any relevance to the coolant temp sensor?
#98561, "RE: Help Needed" In response to Reply # 0
Originally posted by peter2.slow I couldn't find any large boostleaks so I can't figure out why it doesn't seem like its making boost. I can hear a whooshing noise under WOT so I think there is a boost/vacuum leak that is making the noise.
Do you not have a boost gauge? If you did, you'd know it was making boost. if you don't, please, hurt yourself.
Originally posted by peter2.slow I did* however notice that my megasquirt water temp sensor (non OEM) was still installed and I must have attached the factory harness to its wires. So my in car gauge was reading perfect but the diagnostic tool reads 250 degrees.
So fix it. They're two different sensors with two different resistance ranges per unit temp. One will not replace the other.
Originally posted by peter2.slow Now while reving at Idle I noticed the turbo compressor surging and the BOV felt like it wasn't opening when i reved the throttle cable. S anyone have any clue why its compressor surging and if it has any relevance to the coolant temp sensor?
if it's compressor surging at all, it's because you're free-reving at idle and you have a hard spring in your BOV, or you need to adjust the tension screw on it. At what amounts to zero boost, you're not going to hurt the turbo if the BOV doesn't open. As long as it works at greater pressures than 1, it's fine. Whatever.
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#98623, "RE: Help Needed" In response to Reply # 0
Ugh...problems again its driving me crazy.
I took kare of the vacuum leaks and the water temp sensor and the car is still running like shit. Before going into boost it drives fine but as soon as the car goes into Postive Manifold pressure it bucks and runs like shit. Now I have my Map Clamp fully tuned and my SAFC wired as well. I got an EGR code after driving for a little I was like ???
Now The SFMU I got was used and already had a disk in it, so maybe I need to switch the disc but I don't know. Any help appreciated again
#98625, "RE: Help Needed" In response to Reply # 3
Originally posted by eclipse982nrRST Whats your FP like? What disc/ring combo are you using the SFMU?
Not sure of the FP I need to get a gauge. As far as the SFMU I'm not sure what disc/ring is in it but I will take it apart if I need to and post a pic.
#98628, "RE: Help Needed" In response to Reply # 4
Okay for a better understanding of the issue. When the car goes into boost the car starts stutter/sounds like its missing. I think it actually may be running too rich. Because I am unsure of the disc/ring combo Im thinking my FP under boost is way to high. Anyone know where to get the 3:1 disc
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