92civichb

i have a 92 civic cx d15b8 recently ive added a dc header and when the weather started to get cold my car started running bad this only has hapend about 4 times within the last 3 months but its very irritating ill go to start it up in the morning and it run good for a few seconds then die although it will start right back up once i get it warmed up its basically ok but if i startit right up then drive trying to get it to warm up faster it will stall (the rps,s get stuck at like 3 grand it wont die just stall for a few seconds) then will go back to normal sorry for the long post please help!!!!!

HMT-Admin

What have you checked?

92civichb

after the first time it happend i took it to a shop and they hoocked it up to a diagnostic machiene and couldnt find anything im not getting a check engine light either

traff1c

I had a problem similar to that.... except mine would'nt die out... it would just idle really low when the engine was cold.... then when it gets warmer like 2 minutes later its fine... turns out it was the O2 sensor.... it was too old.. might try getting that replaced....

92civichb

was your check engine light comming on

92civichb

can anyone help??

5_LiTeR_EaTeR

I would say its your coolant tenperature sensor. Its located in the pass side of the head just below the distributor. What the coolant temp sensor does is tell the ecu what temperature thge motor is at. From there the ecu will adjust the a/f ratio plus cold enrichment so that the motor can go into closed loop faster by warming up the motor faster. What its probably doing is reading that the temp is very very cold and telling the ecu that so it revs the motor up at a higher rpm to compensate and get it into closed loop faster. then it will kick back in and start to work at thats why it goes back to normal. Most of the time when thermistor sensors go bad they won't set the MIL on untill it gets really bad. Try replacing the coolant temp SENSOR, not Switch or sending unit if they ask. hope that bit helps Good Luck.

-Alex

92civichb

where can i get a coolant temp sensor and for how much??

is it an easy install

why would my car only run bad for like a day or so the a few days later its like nothing was ever wrong

please help!!!!!

J-SMITH69

well, it the coolant sensor the same sensor that is used for your gauge in the console. just look at that one.

92civichb

also it takes a long time for it to heat up in the morning ill let it idle for like 20 min and then drive to school and 25-30 min later its warmed up could this have anything to do with it