MSefi.com read only forum (Jan.15,2018)

Thanks Matt

I am in the orocess of installing MSII V3 on a 1987 Suzuki Samari unsing EDIS 4 and the throttle body off a 1991 geo Tracker. I have sucessfully installed Ms on GM v6 but the import is new. what I am trying to figure out is the TPS wiring. The TPS on this system uses 4 wires does anyone know how the ...

Sorry, it was poerator error. I forgot that I disabled the ego input. Thanks for the insight Matt.

Blatzy

I have an MS II v3 that I had installed in a sandrail and the clip for the DB9 worked its way loose and fried some components. Everything on the computer except for the O2 input still works. The visible damage was the c16 but it has been replaced. Anyone have any insight of where to start.

Thanks ...

Problem resolved,bad coil and stim (what are the chances of both of them being bad) Ecu is installed in car and running. I can't than you enough Matt for all of the help and insight.


Thanks
Harold

I removed the jumper from the tachselect to the optoin and I am still getting the 12v at the tachselect(this is why i am thinking the stim is bad). When I installed the new 555 chip and the new Q1 I powered it up with a bridged solder joint at the q1. Could this have damaged the new 555? I do have a ...

What I am trying to figure out is does the tachselect represent the input for the tach signal and if so the 12v should be coming from the stim.


blatzy

Does the voltage at the tachselect represent rpm signal? Be cause once the jumper is removed I have a solid 12v and connot adjust test led to flash. Does this sound right. I am doubtful about the stim but I am trying to isolate where the rpm signal comes in and how to isolate the stim from the ms II ...

Would it be safe to assume that the problem would be with the stim, since I have no way of contrilling the voltage(solid 12v no matter what I do with the stim) the problem would be with the stim. But I do have the same problem when the ecu is in the car.I did just replace the hei module so I guess I ...

Matt,
I tried using the test led to chek for the tach signal at tachselect but I got a solid led I then removed the jumper then checked with a multi meter I get 12v at tackselect 0 at optoin. I the removed jumper optoout and tsel and I get solid led (4.9v) at optoout and nothing on the tsel ...

Matt,
I have the MS II set up for the hall circuit (GM HEI) and the rpm circuit on the stim is switched to PNP, but that is the switch that when I move it back and forth the pump light comes on and the I1and I2 will start to flash verry dimly.

thanks
Blatzy

OK I thought the problem was fixed but I am only partially there. I am still grounded out somewhere. Here is what I have.
1. the MS II v3 was working perfectlly untill I did some welding on the car.
2. I did have a blown r19 replaced it and now half of it works, most inputs(clt,tps,iat)
3. on the ...

Apparently welding on a car that the computer installed is not a good idea. With the help of Matt Cramer(DIYAutoTune) problem appears to be resolved. Blown r19. Once again thanks Matt.


Blatzy

I have been doing some more trouble shooting and I think the problem is in the st232 switch. Does this sound to be a possibility for the cause of a short?

Thanks
Blatzy

I have a ms II v3.0 that up untill a couple of days ago was working. We had done some work on the car and when i went to fire the car is the injectors were constantly firing and the there was no response with the computer. I took the ecu out of the car put it on the stim and niticed that the f1 was ...

I am getting ready to add MSII to a GM 3.5 out of a 2004 Malibu I noticecd that it only has one fuel line. From what I can see the return line feeds back to the pressure side. Can anyone tell me about this system, how is the pressure regulated, what is the factory pressure, or do I use a special ...

Phil,

My thought is that it is not the lc1 itself but the possibility of it losing ground. Either through noise or through loose connection. When I was burnning them up because of the faulty ground I would get the error code 2 and 8. Just some possibilities, at $65.00 a shot frustration sets in ...

Phil,

I too have had many problems with the lsu4.2. I currently have it installed on 8 vehicles and two of the instaltions have given me problems and have purchased my share of sensors. One of the instaltions keeps reseting itself so I called innovtive and they keep telling me noise in the ground ...

I was running MSII LC1 on the GM 3.1 but after completely destroying the engine I want to move on. The engine is in a sandrail the requires an adapter plate at the trans so I was wanting to stick with something that would bolt into the same place and I was told the GM 3.8 would. I have found a late ...

Ihave a few questions regaurding fuel pressure and the regulator. First off I am currently running a stock GM regulator on a 3.1 SFI. What should the pressure be at idle and should the pressure rise as I go from vacum to boost. Then, just to double check the regulator should be on the return side ...