Search found 145 matches

by Crazy Striker
Tue May 28, 2019 10:11 am
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I've made the changes.
Are you still using manual idle or have you succeeded in finding good PID values ?
by Crazy Striker
Mon May 27, 2019 3:13 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

You may find it very close to yours as I used it to solve my coil issues
by Crazy Striker
Mon May 27, 2019 3:10 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

Hi ! I don't have any issue starting when hot, it catches after approx 3s of starter. I disconected the VVT actuator first to get my VVT offset and it now works fine. for the trigger offset I use 0 with no issue at all. In fact with your offset of 12 degrees the car was unable to fire and made the l...
by Crazy Striker
Mon May 27, 2019 9:47 am
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

Hopefully the last mistake :D Wrong input for AFR and wrong calibration. My engine was running slightly lean (16-17) and heated up quickly, now I've upped the entire VE table by 1.5 and it runs rich but on purpose, to be on the safe side. I've done a short test run around my school and the throttle ...
by Crazy Striker
Mon May 27, 2019 9:10 am
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

For the rich part I now know where the issue come from.
It's just that my MAP input seem to be improperly grounded which leads to a read value of 10 at all times. In fact my AFR were pretty correct and I need to solve that issue
by Crazy Striker
Mon May 27, 2019 8:56 am
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

Very very very good news guys ! I can now crank the engine, cold or hot and on half E85 :D :D I'm so thankful to you, I'm now closer than ever I'm so happy but I still need to solve the fact that my engine runs pig rich, I may not have the right injectors dead times dialed in... And because you seem...
by Crazy Striker
Sun May 26, 2019 10:09 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

It's 1AM now in France so I can't test it but I will try tomorrow morning. On stock ECU it still runs fine except for this issue : I have a weird noise on cranking, after the key is released from starter, I have some heavy grinding during 2 or 3 seconds, and sometimes some clanking when idling which...
by Crazy Striker
Sun May 26, 2019 8:10 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

MgFoster I may have found your tacho issue. I do not use the tacho output but the dizzy. It works fine for me, feel free to try it, I attached my working config for this. Gwendal Edit : lookng at my files I just found we don't have the same ignition outputs, it may explain why my engine was not runn...
by Crazy Striker
Sun May 26, 2019 4:33 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I just followed the wiring from the Miata 2003 alt. page and it worked on the first try. The only thing that do not work for now is the CEL... I was wondering if for the cranking problem I couldn't use a row set at 450 RPM (with the cranking limit set at 400 RPM) set withe the cranking timing on the...
by Crazy Striker
Sun May 26, 2019 3:12 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

Thanks for the infos, I can't find the correct dead times it's awful. I checked the marks with the stock ECU at Idle and it was at 10 degrees fine. I checked the timing when cranking with RusEFI (with fuel off) when it is fixed at 10 degrees. For the roughness it might be from the IAC badly configur...
by Crazy Striker
Sun May 26, 2019 1:12 pm
Forum: Dev: Hardware
Topic: microRusEFI
Replies: 388
Views: 516978

Re: microRusEfi

So few components, it is wonderful. This may inspire a few of us to build some very small PnP RusEFI now 😉
Very nice work
by Crazy Striker
Sun May 26, 2019 12:44 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I stole your tune and set the car to 10° fixed timing and it runs ! Very rough and very very rich but it runs ! I also used a timing might to check the timing and the mark was spot on 10° 😎 or maybe it was the wrong mark but it wouldn't be too difficult to set. The engine was cold by the way. Sorry ...
by Crazy Striker
Sat May 25, 2019 12:04 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

For the crank and cam inputs, are you using the opamps and not he MAX chip? I don't knoq if I have to invert the signal with this configuration. I removed the capacitors to avoid getting the signal filtered.

Thanks again

Gwendal
by Crazy Striker
Sat May 25, 2019 10:55 am
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

Hi !
Thank you very much for you very complete response, I will try to look at it as soon as my battery get charged again.
All those attempts are polling hard on the alternator and I can hear it whining when I deplete the battery

Thank you for the tune also !

Gwendal
by Crazy Striker
Fri May 24, 2019 6:26 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

Hi everyone ! I'm back and still unable to start the car. Crank deciding is now perfect, I definitely have spark and fuel but I still have this strange behavior. Either I spit loud bangs from the exhaust either I have kind of kickback where the engine stops and the electricity goes down. I was able ...
by Crazy Striker
Fri May 10, 2019 7:59 am
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I saw on another thread that the warm-up fuel multiplier switched from % to a multiplier value.
Should I account for it in my settings ?
Last time the car ran it ran very very rich (like 8-9 AFR)
by Crazy Striker
Thu May 09, 2019 9:17 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I'm also working on a more definitive approach for wire interfacing using a PCB to link the 64 pin space on Frankenso to the 72 Pins NB2 connector and my auxiliary harnesses to avoid the kind of issues i've ran into before (snapped wires and such). I did the layout and now linking the two together. ...
by Crazy Striker
Thu May 09, 2019 6:43 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I was pretty busy these times so I had to leave the project for a little. I worked on it this afternoon and found the source of the loss of synchro. When desoldering filter cap on OPAMP I burned a pad that connected 10k resistor to the OPAMP input. Just soldered a solid jumper to it to solve this al...
by Crazy Striker
Sat May 04, 2019 10:47 am
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I started the car fine but it was idling horribly rich. I may revert back to NB2 base settings since I no longer have issues running the engine. I notice a lot of what can be kickbacks during cranking. The starter motor suddenly stops and the car resets itself. I'm also chasing engine noises. Car st...
by Crazy Striker
Thu May 02, 2019 2:46 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

Hi all ! I wasn't particularly active last week because of my schedule but I'm back. Just redid all the solders on the MAP input and as I thought it was a cold koint fucking all up. Now with an accurate MAP reading I will be able to run on rusefi hopefully on a daily basis and let the autotune do hi...
by Crazy Striker
Fri Apr 26, 2019 10:15 am
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

So I just received my MPX4250 and I have the same issue with the map value. It is down of the the real value with a coefficient of 1.77. I may have messed with the voltage divider on the MAP inputs. I will try switching inputs to see if it solves the issue
by Crazy Striker
Tue Apr 23, 2019 10:59 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I bought a GM style knockoff and it failed pretty quickly, I now prefer using a branded sensor, and considering how much I paid for it I hope it would be a real one :roll: I soldered crank input directly but still have some misses during cranking, only when engine is hot and cranking faster. I got t...
by Crazy Striker
Tue Apr 23, 2019 6:35 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

After loosing the sensor ground and reconnecting it, I'm still facing my MAP sensor issue. I ordered a MXP4250AP from RS this evening and I should get it by Thursday. I got my first coldstart this afternoon, but the engine was quite strange because of the problem stated above. Is the frankenso board...
by Crazy Striker
Tue Apr 23, 2019 2:59 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

Fuel pump issue solved, it was a bad solder joint between PE4 and the 20 Ohm resistor for the mosfet charge.
by Crazy Striker
Mon Apr 22, 2019 5:04 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I got to that point pretty progressively while checking for AFR and detonation. I think the tune is taken form the same car and is kind of conservative.
The only tuning issues were at load load and low RPM where the map is way off
by Crazy Striker
Mon Apr 22, 2019 4:09 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

I solved the IAC problem today. It was just due to a component in the wrong oientation ( the MOSFET). Now it starts (only wtested when warm) and it runs. I've made my first rolling test but the tune is a bit too rich on idle (I mean way too rich, like >10 AFR), therefore it it perfect at WOT at 7K R...
by Crazy Striker
Fri Apr 19, 2019 3:12 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT #50

So quick recap of what works and what not : Working : - ECU power - Trigger - Ignition - Injectors - MAP - Wideband - IAT - CLT - TPS - VBatt - Warm cranking - Running engine (up to 6500 RPM) Not working : - Cold start - IAC and Idle Not tested yet : -VVT TODO : Solve the IAC issue. I will unsolder ...
by Crazy Striker
Thu Apr 18, 2019 5:53 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT

Here is a video of it running on RUSEFI :D https://youtu.be/O0SYoIAgDAk Still have some issues with the decode at warm startup but once it catches it works well, except for the IAC. It still wide open so the video you see is with the IAC unplugged and me governing the engine My Chinese MAP sensor ju...
by Crazy Striker
Thu Apr 18, 2019 2:44 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT

I wondered about it because of the wiring diagrams I found on this wiki.
The 2003 and 2002 pages seemed reversed for me. I can try to check on my own car but what is sure is that 4S isn't connected and the car is running 🤔
by Crazy Striker
Thu Apr 18, 2019 2:27 pm
Forum: You and your build
Topic: 2004 Mazda MX5 1.8 VVT #50
Replies: 169
Views: 132517

Re: 2004 Mazda MX5 1.8 VVT

I have a little question. On 2003+ miatas the ECU should be powered by the ignition +12 (4S).
I didn't connect the 4S and the ECU seem to be powered by 4AF at all time, like in the 2002 diagrams.
Is this because it is EU spec or something ?