i recently pulled out the chiltons and started checking my sensors with my multi meter because my car just isnt running right. so i check my map sensor and the green to yellow shows 5 volts but the green to white shows .6 volts so i replace the wire all the way to the ecu and still only shows .6 volts does this mean that my ecu is bad? also i hooked it up to my tps and my starting voltage with it all the way closed is .19 and with it all the way open is 3.8 does this mean my tps is short or it needs to be ajusted? any help would be graet thanks

 

bump i am really needing answers i could find anything when i searched

 

not every wire is goinna get a 5 volt reference...sometimes you will get a sensor sensor wire and a wire with 5volt reference and then u'll have your ground...and voltage at close throttle is pretty low... but voltage at wide open throttle usually is around 4.2-4.3.... what kind of problems are you running into??

 

it idles rough ,has a bad miss and it feels like its being held back and my chiltons said the wire should have 5volts and thanks for the reply

 

a number of things can cause a rough idle for example bad motor mounts... things can cause a misfire is is anything from a ****ed up cam or lifter,stuck closed injector,bad spark plug but if ur thearoy is bad ecu...switch it out with a friend and see what happens

 

you might need to adjust your tps i can tell that its not calibrated to the right specs according to your post. it should be 4.5 at WOT and .5 at closed if i remember right. search to make sure

 

all motor mounts are good i think it is the miss thats fin up the idle but i am gonna check my injectors and order a new pr4 mt ecu cause none of my freinds have one and i will get back to you guys and let you know how it goes and thanks for the reply

 

BTW what car and motor is this anyways?

 

88 civic hatch dx with a full integra wiring harness and a 97 b18b converted to obd0

 

so your running an ls ecu correct?

 

yup pr4 out of a 91 integra