FREE MPI help!

[Bigg Tim]

I see, the analog in hit 5.06v, but the analog out never went about 4.98 so it is doing what is supposed to be doing. So I don't know what it is. I see the AFR goin way rich, maybe you are blowing the spark out by being so rcih. Do you have a WBO2 to tell the AFR when the SW shoots it pegged rich? What gap are you running on the plugs?

Also, do you idle in the first column or the 2nd? If you idle in the 2nd, you need to change the deflection to get it in the first column. I can tell you how tomorrow when you call.

 

[JDM Sam]

one of these should be the right one timm

You're using the extra injectors only and have the turbo module wired in?

 

[Bigg Tim]

You're using the extra injectors only and have the turbo module wired in?

You still need an O2 clamp. He is not using the coolant clamp, only the O2 clamp. And the TM is needed for the ignition and MAF control also. His setup should be very nice, no surge when the TM comes on. That's the beauty of xtra injectors. This is how the MPI was originaly sold, until people didn't want to spend money on xtra injectors.

 

[wicked]

this says it all,I stepped on it in first to the cut,then to a decel.

I had the lmit at 4.94v I believe,but 5 came up,no doubt about that.

 

[Bigg Tim]

this says it all,I stepped on it in first to the cut,then to a decel.

I had the lmit at 4.94v I believe,but 5 came up,no doubt about that.

The ECU did NOT see 5v, so it can't be fuel cut via the MAF. The input hit 5.22, but the output to the ECU only hit 4.98. You can't be hitting the typical fuel cut because that is when the ECU see's more then 5v.

Lower the fuel upper limit and do another run so I can see the different upper limit.

 

[wicked]

ok,will do.

BTW,should the load be set so low?
I changed it today to 99%,but I still have the problem.


BTW, I am getting the cut damn near dead on ten PSI.

 

[MPNick]

ok,will do.

BTW,should the load be set so low?
I changed it today to 99%,but I still have the problem.


BTW, I am getting the cut damn near dead on ten PSI.

Are you running a bigger turbo?

 

[pluto316]

I thought you were giving out MPIs for help.

Curses.

 

[wicked]

Are you running a bigger turbo?

yes,I am running a GT28RS

 

[MPNick]

yes,I am running a GT28RS

Try to lower your fuel clamp to 4.6 and add more extra injectors.

 

[Bigg Tim]

You said you lowered your fuel upper limit. Where is it set to now? I thought you had it lower, if not, set it lower. Nick had to set his lower with his better turbo setup, but that was at higher boost. Anyway, try to keep going lower until you don't feel it.

 

[wicked]

I had my upper set to 4.30,and I still get it,I have tried a lot of s***,this is getting anoying.
I want to drive the car the way it was ment to be.

 

[Bigg Tim]

I had my upper set to 4.30,and I still get it,I have tried a lot of s***,this is getting anoying.
I want to drive the car the way it was ment to be.

If you had it set that low, you shouldn't have had any problems. There has to be something else wrong. When it was 4.3, did the analog in ever hit 5v? Do you have a log from the 4.3?

 

[mazdaspeed75]

as

Try to lower your fuel clamp to 4.6 and add more extra injectors.

I had to lower mine to 4.7 to not hit the fuel cut and i also had my map to rich in two spots which i though t was fuel cut but it was to rich there . Running strong now added some timming back in man i thought it was fast before Nick i need to get you a datalog so you can check it out . I still believe -16 degrees is to much out .

 

[MPNick]

I had to lower mine to 4.7 to not hit the fuel cut and i also had my map to rich in two spots which i though t was fuel cut but it was to rich there . Running strong now added some timming back in man i thought it was fast before Nick i need to get you a datalog so you can check it out . I still believe -16 degrees is to much out .

-16 may be a little much but you are safe. No need to order our short block three weeks before Christmas. I would not be sad but you may be, so keep it right at -16.

 

[apocman]

I know after we did MPNick turbo upgrade on Ti-99 car all the strange problems went away. I did discover after doing a seafoam test for vac and exhuast leaks that a lot of us had them, but not enough to throw CEL's and after we did the turbo upgrade it reduce the amount of leaks Ti-99 had and the only reason he still has one is becuase we over torqued and flattened the gaskets, so we are in the process of replacing his gaskets and bolts and using proper torque specs. He also has a corksport s-pipe that will not allow you to tighten one of the nuts on the turbo to exhuast manifold part becuase the stud hits the pipe bend and will not allow for it to tighten properly, but we will install a shorter stud to resolve that problem. After this we will re-tune the car and he will enjoy his ride...

 

[apocman]

so my point is we all should do a seafoam test and ensure we have no vac or exhuast leaks and if so resolve them. I have learned a very important thing and that is to always replace all gaskets, nuts and bolts, washers etc... when you remove something... And always use proper torque and tightening sequences as well. for instance the exhuast manifold has a special tightneing patteren and you have to tighten in a two stage fashion, once to 8 inch pounds and then you go back and follow the same tightening sequence and use 16 inch pounds, even going out of the spececial bolt tighting sequence can cuase leaks which will lead to phantom problems...

 

[Bigg Tim]

so my point is we all should do a seafoam test and ensure we have no vac or exhuast leaks and if so resolve them. I have learned a very important thing and that is to always replace all gaskets, nuts and bolts, washers etc... when you remove something... And always use proper torque and tightening sequences as well. for instance the exhuast manifold has a special tightneing patteren and you have to tighten in a two stage fashion, once to 8 inch pounds and then you go back and follow the same tightening sequence and use 16 inch pounds, even going out of the spececial bolt tighting sequence can cuase leaks which will lead to phantom problems...

I hope you mean foot pounds....inch pounds is nothing. Off topic, when are you going to send me the info I asked for there slick!!! PM sent!

 

[terbow]

also off topic, whats the seafoam "test" and whats the pattern for the mani install.

 

[apocman]

nope I mean inch pounds per mazda with pictures and detailed instructions. The gasket are thick and designed to work at the proper torque spec, if you over torque you smash the gaskets and cuase leaks no matter how tight you get it and that leads to stripped and broke bolts and studs...

I know what your thinking, but I send you the data if you like and BTW I will send the website as well for the mouse and stuff sorry thats the ADHD in me .

I hope you mean foot pounds....inch pounds is nothing. Off topic, when are you going to send me the info I asked for there slick!!! PM sent!