# Car idol/misfire problem..bad gas? **URL:** \ **Category:** SON240sx Automotive\ **Created:** [October 7, 2007, 4:17pm UTC](https://forums.speedlife.net/t/car-idol-misfire-problem-bad-gas/110074 "2007-10-07T16:17:24Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Lucas180](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lucas180/32/5556_2.png) [@Lucas180](https://forums.speedlife.net/u/Lucas180)\ **Post date:** [October 7, 2007, 4:17pm UTC](https://forums.speedlife.net/t/car-idol-misfire-problem-bad-gas/110074/1 "2007-10-07T16:17:24Z")
ok so i had to put pioneer gas in my car to make it to the next good gas station…so i put 10$ in and it was actally enough to get me home…i get home wait a few seconds to shut off the car and the idol starts going all funny…like droping to 200 going back to normal…and so on …but never shutting off the car totally…so i go back out and put in what i usually do Sonoco 91 (35$ worth) car seems to get better so i go home and shut it off…today i get up to check what it does…same problem…so i watch it idol for about 10 minutes then go out to CT and other stuff to drive and see what happens…seems fine …but then starts doing the problem again…so i put some gasline antifreze in it becase im thinking theres water in the gas i hold it at 2000 RPM and it seems to misfire…anyway just tried now and it runs fine again…so what do you guys think it is? bad gas? Trottle position senson ? MAF ? vaccume line…i dont think it could be fuel pump…or sending until or filter…all new last year… anyways any help would be apericated if its bad gas i hope it goes away soon 😑 ---
**Author:** ![fastback240](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fastback240/32/5591_2.png) [@fastback240](https://forums.speedlife.net/u/fastback240)\ **Post date:** [October 7, 2007, 4:34pm UTC](https://forums.speedlife.net/t/car-idol-misfire-problem-bad-gas/110074/2 "2007-10-07T16:34:07Z")
i always put ultra 94 in and i have the same problem sometimes on startup, once in a blue moon idle will just go up and a constant speed till i put it in gear and move or i shut the car off and start it again, i just ignore it and hope it goes away… id kinda like to know what it is to… im starting to think ecu… ---
**Author:** ![Lucas180](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lucas180/32/5556_2.png) [@Lucas180](https://forums.speedlife.net/u/Lucas180)\ **Post date:** [October 8, 2007, 2:27pm UTC](https://forums.speedlife.net/t/car-idol-misfire-problem-bad-gas/110074/3 "2007-10-08T14:27:08Z")
Hmm well ive used up some of the gas going places and then took a long drive today and seems to be fine again…so i belive it was just bad gas…strange. but imglad its good again now ! ---
**Author:** ![fastback240](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fastback240/32/5591_2.png) [@fastback240](https://forums.speedlife.net/u/fastback240)\ **Post date:** [October 8, 2007, 3:15pm UTC](https://forums.speedlife.net/t/car-idol-misfire-problem-bad-gas/110074/4 "2007-10-08T15:15:33Z")
> [@Best Shootout clips](https://forums.speedlife.net/t/best-shootout-clips/14382/24): > > Hmm well ive used up some of the gas going places and then took a long drive today and seems to be fine again…so i belive it was just bad gas…strange. but imglad its good again now ! yeah come to think of it since iv started to use 94 and not 87 gas its been better ---
**Author:** ![Lucas180](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/lucas180/32/5556_2.png) [@Lucas180](https://forums.speedlife.net/u/Lucas180)\ **Post date:** [October 8, 2007, 3:19pm UTC](https://forums.speedlife.net/t/car-idol-misfire-problem-bad-gas/110074/5 "2007-10-08T15:19:10Z")
You should never use 87 not even in a KA! …at least if you want it to run well lol