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went from surging to rich/steady 1000RPM

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KayTeeGST

Proven Member
65
5
Feb 25, 2015
San Diego, California
So my car been surging from 1500 jumping to 2000 RPM'S, CEL on P1400, P0125, P0170 which is coolant sensor and some with bank 1 fuel trim and something else I see people post similar CEL codes w/ same issues. I only replaced MAF so far didn't make difference still surges bad. Any who usually after being in traffic an hour and driving around my car stops surging and idles rough . Gauge chilling at rich . But today after 10 minutes it stopped surging the whole way home, it actually sucked cause I knew something probably happened but ECU was giving system to much fuel so started misfiring, it usually takes less then a quarter tank getting home it took at quarter and some change the smell was so strong was giving me a migraine and my CEL turned off and idle wasn't rough I thought car died when it stopped surging LOL . Idk if it was my 02 sensor that gone out but would like a general idea before looking at it . Like to research before getting into things .
 
If the coolant is bad (which you have a code for) it will give wrong readings to the ecu which will mess with your afr. So yes the ecu might think it's running cold
 
Oh okay I didn't have a clue as to the coolant sensor could do that . But makes since thank you very much . But also as for all the codes I need to replace the 02 sensors and the ISC ?! And probably do a tune up ?! If it starts surging again would that help the surge issue .
 
Will do so since I am doing my timing belt/water pump/gaskets/seals and tensioner a basically all top end as well so coolant sensor and that's it until I check the other parts .. Okay thank you, Also those links ares super helpful I read one of em but thank you ima save those until I fix my surging haha .
 
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