Who wants to Megasquirt, full sequential fuel/ spark a 68 charger! This Guy!!

[grnfsh]

I assume you have confirmed proper pressure at the rails.
Possible dwell setting not leaving them open long enough to supply fuel.  Have you confirmed the proper 12v power source to feed injectors?

so 12v should be fine as I can run in test mode. Dwell setting may be an issue, but if it works on redmist's it should be ok on mine right?

[redmist]

Looking at your most current log, I am still seeing a dead MAP sensor. It is stuck at 12.8KPA from zero RPM to cranking. you should see barometric pressure at rest, and then it should go to a more sane idle vaccum area when started. around 50 KPA.

We must fix this first!

Create a MAP gauge in tuner studio, key the car on, but don't start it and tell us what you have at rest.


Ryan

[redmist]

Here is a picture of my MAP sensor on my setup. You can see that pin out is labeled right on the sensors from the factory. This one reads: " 5V  Vout  GND "




Also post a picture of your install! It looks real nice and clean. I see that you have the emissions Port on the throttle body open! Get a cap on that large tube, I believe it's fresh air, but it might be vacuum.

This suckers gunna start and run good!

[grnfsh]

I double checked my wiring on the MAP sensor and it appears to be correct. I'm wondering if the sensor itself is crap? Just to be clear the Vout goes to EXT_MAP right? I used GM 1 bar for calibration

The Barro seems to be reading just fine. The MAP is at 12.9 KPA and doesn't budge. Here is a shot of my gauges

[grnfsh]

also, as requested I just took a pic of the install. Excuse the wiring as I've been pulling the looms apart making sure everything is correct.

[grnfsh]

ok MAP is sorted. Had to go from "Voltage" to "Frequency" in the general settings for MAP.

also, I did test mode again on the injectors and sprayed fuel in the cylinders and the car fired. This tells me the injectors are not firing when cranking or running. Why?

[Black_Bee]

I assume you have confirmed proper pressure at the rails.
Possible dwell setting not leaving them open long enough to supply fuel.  Have you confirmed the proper 12v power source to feed injectors?

I have the feeling that this was already discussed, but did you accidentally wire your injectors to have 12V while running, but not while cranking?

[MechTech]

I would verify that you actually have voltage at the injector while cranking.

[grnfsh]

I would verify that you actually have voltage at the injector while cranking.

Well lets assume I DON'T have 12v while cranking. What do I need to do to fix it? I'm sort of confused. If I have 12v that works in test mode the 12v is coming from the same source either way.

[redmist]

Did you pull voltage from the two leads that were used for the ballast resistor??  I agree, now that the MAP sensor is working, I would confirm voltage while cranking on the injectors. The factory MOPAR wiring will drop one leg when cranking, so the two must be combined!


Ryan

[grnfsh]

Its not connected to the factory mopar wire harness. I created its own circuit on a toggle switch to eliminate those issues with getting this thing together. The coils are on the same circuit and they work fine. 

[grnfsh]

so I just tested the injectors with a noid tester and it appears only number 1 is actually firing when cranking. What's up with that?

[Black_Bee]

so I just tested the injectors with a noid tester and it appears only number 1 is actually firing when cranking. What's up with that?

How did you wire your injectors?

Maybe as a test, make sure that you have 12V (ground the test lead to the battery or block not the injector wire from MS) at all injector power wires with key on, and then when cranking.

[grnfsh]

so I just tested the injectors with a noid tester and it appears only number 1 is actually firing when cranking. What's up with that?

How did you wire your injectors?

Maybe as a test, make sure that you have 12V (ground the test lead to the battery or block not the injector wire from MS) at all injector power wires with key on, and then when cranking.

Bank A and B have their own individual fuse and then each logic A-H is wired to its respective injector. They have to be wired right because they fire in test mode right?

[Black_Bee]

Bank A and B have their own individual fuse and then each logic A-H is wired to its respective injector. They have to be wired right because they fire in test mode right?

Yes, you would think that if it is working in test mode then it should would when trying to fire it up.  Since it isn't working, who knows whats going on without testing everything?

Another thing that has occurred to me for testing... have you tried checking that the timing while cranking is what you have set it to (or even in the ballpark)?

Do you have your Cranking/Startup settings set to batch fire?

Maybe attach your tune and a cranking datalog?

[redmist]

You can do injector test and hear each one click yes?  If so, you should be wired correctly.

When you turn on the key, do you hear each injector fire one pulse as the fuel pump primes?

[grnfsh]

You can do injector test and hear each one click yes?  If so, you should be wired correctly.

When you turn on the key, do you hear each injector fire one pulse as the fuel pump primes?

Yes, I can hear them click when I test each injector. So yes, I know they are wired correctly.

HOWEVER.. No, I do NOT hear the prime pulse. I did hear it at one point when I first wired them up and am not sure why I do not anymore.

[redmist]

Crazy stuff here... It's going to be something silly, I know it is. a relay being activated or deactivated during crank, a trigger wheel set wrong so it doesn't have enough teeth before it to calculate timing, or something like that. I see you have a good thread on MSEXTRA going. I would stick to that thread and solve the issue there and let us know what it is that fixed it. I will chime in on that thread as well.

This is what is so awesome about megasquirt though, you have an entire community trying to solve YOUR issue!

[grnfsh]

Crazy stuff here... It's going to be something silly, I know it is. a relay being activated or deactivated during crank, a trigger wheel set wrong so it doesn't have enough teeth before it to calculate timing, or something like that. I see you have a good thread on MSEXTRA going. I would stick to that thread and solve the issue there and let us know what it is that fixed it. I will chime in on that thread as well.

This is what is so awesome about megasquirt though, you have an entire community trying to solve YOUR issue!

Thanks, yeah, I started a thread over there to try an leverage some of their ideas. At least there is some progress. Not fast, but some. 

[grnfsh]

By the way, Redmist, how is your supercharger install coming along?

[funknut]

Thanks, yeah, I started a thread over there to try an leverage some of their ideas. At least there is some progress. Not fast, but some. 

Would you mind linking the thread?  I'd like to see how this resolves!

[shawge]

I think this is it

http://www.msextra.com/forums/viewtopic.php?f=131&t=62415

[MechTech]

I have a prototype made of a CPS hold down clamp I'm going to have some of these made for anyone interested. I will have the Bushing and the Clamp available as well as trigger wheels and sensor brackets. Pictures attached.

[redmist]

By the way, Redmist, how is your supercharger install coming along?

I shelved it for next winter.... I bit off more then I could chew with mods this winter, and wanted to drive the car, so Pro-Charger will be next year.   

[grnfsh]

IT RUNS!!!!!!!  

you guys will never guess WTF was wrong. We all though it would be something stupid and it was.

Had remembered at one point that the injectors cycled properly at one point but didnt remember when that stopped happening. I started going backwards. I had swapped relays, and did some other things. Then I had an idea, all i did was swap the 5A fuses I was using for the injectors for 15A fuses. Soon as I flipped my toggle switch I heard the prime cycle. Turned the key and it fired.

So either the 5A wasnt enough or those 5A fuses were shot. They are non see though so I couldnt see if they were bad and had no reason think other wise. I was running 5A fuses for my injectors. Based on what the diagram for the MS3 said. What size fuses do you guys use for injectors?

anyhow, thanks for your help guys. I'm going to get this thing drive able this week so we can take it down to the show in a few weeks. Hopefully there wont be any new surprises.