# idle/hesitation/studdering/popping(backfire?) **URL:** \ **Category:** SON240sx Automotive\ **Created:** [June 30, 2007, 5:58pm UTC](https://forums.speedlife.net/t/idle-hesitation-studdering-popping-backfire/107294 "2007-06-30T17:58:12Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Fusion240](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fusion240/32/5594_2.png) [@Fusion240](https://forums.speedlife.net/u/Fusion240)\ **Post date:** [June 30, 2007, 5:58pm UTC](https://forums.speedlife.net/t/idle-hesitation-studdering-popping-backfire/107294/1 "2007-06-30T17:58:12Z")
91 240sx super hicas s13 ka24de Ok, I got my 240 a while ago and I know its been sitting around for some time before i got it and after i got it so I changed a few pieces. At first it ran real rough and bad and I found out one of my injectors wasnt working, got some injectors and then I had 4 cyclinders again. Then I got it safetied (passed no prob, did alot OF work ;)) I got my 10 day permit and took it out for a spin. Since I had it on the road I find it runs nice when its cold, like when I go to work. but when it heats up and reaches normal temp it starts to like bog out, some serious hesitation/studdering and some backfires(small quiet ones) I’ve been taking backroads and was able to find that between roughly 2000-3000 (very random theres no noticable pattern at all) is when this occurs. And sometimes It’ll run fine between 2-3k rpm, but I’d say 8/10 times it happens. I also notice that it doesnt really have much power as well. What I’ve done: Bings 3" Exhaust Catback AEM Intake New Rotor Button New Distributer Cap New Accel Wires New Plugs New Oil/Filter And I’ve even switched the maf to see if the sensor was gone, was ok. Cant get orignal o2 sensor out, I do have a new one tho :P. The spark is good,injectors work, cant find any leaks, everything is tight it wont keep a steady idle for etest and the problem occurs when stopped and while driving. Engine also makes a constant clicking noise too when warmed up. If anyone can help I’d appreciate anything. ---
**Author:** ![purposebuilt](https://avatars.discourse-cdn.com/v4/letter/p/90ced4/32.png) [@purposebuilt](https://forums.speedlife.net/u/purposebuilt)\ **Post date:** [June 30, 2007, 9:39pm UTC](https://forums.speedlife.net/t/idle-hesitation-studdering-popping-backfire/107294/2 "2007-06-30T21:39:43Z")
Had the same problem… the gaskets on my exhaust were crap… exhaust leak… ---
**Author:** ![GetARide](https://avatars.discourse-cdn.com/v4/letter/g/e495f1/32.png) [@GetARide](https://forums.speedlife.net/u/GetARide)\ **Post date:** [June 30, 2007, 10:51pm UTC](https://forums.speedlife.net/t/idle-hesitation-studdering-popping-backfire/107294/3 "2007-06-30T22:51:13Z")
your catalytic convertor is probably clogged, install a straight pipe 🙂 ---
**Author:** ![side\_wayz](https://avatars.discourse-cdn.com/v4/letter/s/5e9695/32.png) [@side\_wayz](https://forums.speedlife.net/u/side_wayz)\ **Post date:** [July 9, 2007, 10:50am UTC](https://forums.speedlife.net/t/idle-hesitation-studdering-popping-backfire/107294/4 "2007-07-09T10:50:53Z")
check ur cold pipe goint to ur throttle body for leaks around the silicone couplers… actually check all u piping for leaks… then check ur manifold and where ur turbo connects to ur manifold… get some baby powder and put it on ur manifold anywhere where there is a meet with a gasket… then check randomly for a crack or leak… then check ur exhaust…all vacum lines… fuel filter,injectors,maff,and ur o2 censor. chances are from wut ur describing its a leak. when u have a leak from ur cold pipe…u will be fine from idle to 3000 rpm, as soon ans u hit boost it will hesitake RANDOMLY and when u let off u will back fire like crazy… if it gets worse u will even stall or almost atall after u clutch in…