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

Alright I'll have to see if I can figure it out tomorrow other than the high idle the car runs great right now I just noticed that the air intake is sucking in more it seems than normal, before I hooked up the ms the car was a daily driver and the I take was never as loud as it is now so I figured I ...

Could it be my cold air intake? Taking in too much air

thank you i have never had the motor apart so im assuming its not the tb gasket is not an issue ut i will check the throttle stop and idle valve

hey everyone im having trouble with the idle on my mustang its a 90 5.0 running MS2 V3.0 my car is idling at about 3000 rpm if i lower the required fuel it idles lower but my drive is not smooth , Iam new to tuning so please be patient i will upload a copy of my datalog and MSQ file thank you in ...

Thanks everyone or the help it was a mistake on my part with the idle circuit everything is fixed now all I need to do is some fine tuning

its deffinately a drive circuit issue i will check to be sure however, again when i hook one end of a test light to a 12v source and hold it on the pin 37 from the ms and cycle key on and off the test light does not light which means its not sending the ground signal but i will check the board and ...

i do actually have a stim , i will try that and i followed the instructions and set everything up the way it told me to i mean the car runs off the ms if i manually control the pump

thank you i always draw up wire diagrams before i start a job, the issue im having is for some reason the ms is not sending a ground signal for the fuel pump if i hook up a test light to pin 37 on the MS with one end connected to 12v the test light does not light up when ignition is cycled so the MS ...

Orry that might of been confusing I'm plugging pin 37 from the ms directly to pin 22 (fuel pump relay) on my stock wire harness for my car the same one the old ecu used to control the relay , so if I ground pin 22 with the key on the pump pumps but if I plug pin 37 from ms to pin 22 from the stock ...

i dont think it can be the inertia switch though becasuse if i run a ground wire to the original harness that im plugging the MS into the pump runs , it just runs constantly , instead of being switched through MS . im assuming something is wrong with the ms itself but how would i test that circuit?

sorry i think i read that wrong in my last post , so MS switches ground? im pretty sure thats how the stock ecu does it as well, so either there is something wrong with the fuel pump circuit in the MS or its not sending the signal for some reason i emailed the guys at dyiautotune so ill see what ...

I beleive the original EEC switches ground to enable the pump , but your saying the ms switches 12v so basically I just run another relay? I'm trying to keep my same setup the only reason I say that I beleive the original EEC switches ground is because off the original harness when I hook that ...

ok i have a 90 mustang stock 5.0 and i installed the MS2 v3.0 and i hooked everything up through the stock wire harness where i removed the old EEC. No matter what i do the fuel pump does not prime the only way i can get the pump to run is by jumping the pump. so im assuming the MS is not telling it ...