# Serious Power Loss! **URL:** \ **Category:** SON240sx Automotive\ **Created:** [May 23, 2009, 8:16pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727 "2009-05-23T20:16:44Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Singh](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Singh](https://forums.speedlife.net/u/Singh)\ **Post date:** [May 23, 2009, 8:16pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/1 "2009-05-23T20:16:44Z")
This problem unfolded on the ride home from drift event yesturday, and has continued. In certain gears, i don’t very little power, and only for a certain rpm. For example, 1st gear is perfect, at all rpms 2nd gear gives me no power from 1800-2800 rpms (approx) 3rd gear gives me no power from 1800-2800 rpms (approx) 4th gear is perfect at all rpms 5th gear gives me no power from 1500-3200 rpms (approx) The three gears 2, 3 and 5 are fine in the higher rpms. It feels like i have V-tec. LOL. I checked the MAF sensor and it looked fine, no wire tears, no rips in the intake pipe or anything. Checked all my fuses, and their all fine. Know this all leads me to believe its some kind of sensor, not the actual engine, because the engine is fine at all rpms in all gears, minus the ones i mentioned above. Any ideas, on what the problem could be? ---
**Author:** ![Gonad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/gonad/32/5481_2.png) [@Gonad](https://forums.speedlife.net/u/Gonad)\ **Post date:** [May 23, 2009, 8:18pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/2 "2009-05-23T20:18:43Z")
You sure your clutch isn’t slipping? Were you in the event or just spectating? ---
**Author:** ![kollo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kollo/32/5661_2.png) [@kollo](https://forums.speedlife.net/u/kollo)\ **Post date:** [May 23, 2009, 8:19pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/3 "2009-05-23T20:19:43Z")
motor?i`m guessing ka? have you checked your fuel pump?or sending unit ---
**Author:** ![Singh](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Singh](https://forums.speedlife.net/u/Singh)\ **Post date:** [May 23, 2009, 8:23pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/4 "2009-05-23T20:23:12Z")
O sorry, forgot to mention its a stock ka24E, no engine mods, no nothing. I did a full tune up on it 2 weeks ago, changed fluids and everything. My clutch is still strong as fuck, i can take off in 3rd gear uphill. I was in the event, but to my knowledge theres no damage to the car. Also, i don’t see it being fuel related, because at all other rpms other those mentioned its perfectly fine, same with the clutch, if the clutch was slipping it would have to do so in every gear??? ---
**Author:** ![kollo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kollo/32/5661_2.png) [@kollo](https://forums.speedlife.net/u/kollo)\ **Post date:** [May 23, 2009, 8:29pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/5 "2009-05-23T20:29:17Z")
my coupe did that a while ago it was a dis cap and rotor and timing ---
**Author:** ![Singh](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Singh](https://forums.speedlife.net/u/Singh)\ **Post date:** [May 23, 2009, 8:32pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/6 "2009-05-23T20:32:12Z")
When i did the tune up, i did distributor cap, ignition wires, spark plugs, fuel filter. I haven’t done the rotor. The timing i didn’t touch at all ever. I’ll have to check the timing and distributor cap and i’ll replace the rotor tmr i guess. Could it be anything else guys? ---
**Author:** ![kollo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kollo/32/5661_2.png) [@kollo](https://forums.speedlife.net/u/kollo)\ **Post date:** [May 23, 2009, 8:35pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/7 "2009-05-23T20:35:42Z")
you can leave your timing but your gonna have to put a new rotor on that may help ---
**Author:** ![Singh](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Singh](https://forums.speedlife.net/u/Singh)\ **Post date:** [May 29, 2009, 1:40pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/8 "2009-05-29T13:40:25Z")
Ok time for update. So I changed the rotor. Only to find know I get the problem in all gears, and even in neutral. In neutral it loses power from idle all the way to 2500rpms or there about. And In all gears i have no power from the lowest point i can engage that gear without stalling all the way up to 3200 rpms. I m about to do the fuel pump right now, i have one from my old car, that i m gonna swap in. I’ll give an update once i do that. ---
**Author:** ![Singh](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Singh](https://forums.speedlife.net/u/Singh)\ **Post date:** [May 29, 2009, 3:08pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/9 "2009-05-29T15:08:56Z")
Alright, so i just changed the fuel pump and checked all the fuel related things, and everything is good. The problem is still there. My car has no power from idle to 2500 rpms (approx) in neutrel, and has no power in any gear up, even reverse, up to 2500-3000 rpms (approx). The thing with the power is, i only have the problem if i give more then 1/8 throttle, if i drive it like ppl with extreme fuel savings problems, then you can’t tell. But when u give it some gas, like more then 1/8 of full throttle then the car boggs down and just slowly creeps up rpms, till it hits that point where all the power comes back. Need help. ---
**Author:** ![MIKE-240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mike-240sx/32/5665_2.png) [@MIKE-240sx](https://forums.speedlife.net/u/MIKE-240sx)\ **Post date:** [May 29, 2009, 3:20pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/10 "2009-05-29T15:20:18Z")
are you running any sort of air intake?? if so id check ur maf to see if its on properly ---
**Author:** ![87s15lt1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/87s15lt1/32/5706_2.png) [@87s15lt1](https://forums.speedlife.net/u/87s15lt1)\ **Post date:** [May 29, 2009, 3:22pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/11 "2009-05-29T15:22:55Z")
wiring…check obvious shit. fuses, grounds, fusible links. Major pin outs on ecm. Continuity tests my friend. ---
**Author:** ![Singh](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Singh](https://forums.speedlife.net/u/Singh)\ **Post date:** [May 29, 2009, 3:35pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/12 "2009-05-29T15:35:37Z")
Not running any intake, bone stock engine. I checked all the fuses and everything, several times. I haven’t checked the ecm though, how should i test that? And how do i check the maf to see if its working properly, because i checked to make sure it was plugged in, and if wires were all good, and it seemed fine. ---
**Author:** ![87s15lt1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/87s15lt1/32/5706_2.png) [@87s15lt1](https://forums.speedlife.net/u/87s15lt1)\ **Post date:** [May 29, 2009, 3:44pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/13 "2009-05-29T15:44:01Z")
can you get your hands on ecm pin out diagram? If you can. just trace what ever you can with a volt meter. ---
**Author:** ![Singh](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Singh](https://forums.speedlife.net/u/Singh)\ **Post date:** [May 29, 2009, 4:18pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/14 "2009-05-29T16:18:33Z")
Hmm, I have the fsm, i think its in there. Any idea’s on how to check the MAF sensor? ---
**Author:** ![87s15lt1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/87s15lt1/32/5706_2.png) [@87s15lt1](https://forums.speedlife.net/u/87s15lt1)\ **Post date:** [May 29, 2009, 4:19pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/15 "2009-05-29T16:19:48Z")
not sure really. We just send them out to get them tested ---
**Author:** ![Singh](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Singh](https://forums.speedlife.net/u/Singh)\ **Post date:** [May 29, 2009, 4:23pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/16 "2009-05-29T16:23:23Z")
Hmm, i’ll check out the ECM tonight then, and I’ll try seeing if the MAF is actually damaged, or fried. ---
**Author:** ![87s15lt1](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/87s15lt1/32/5706_2.png) [@87s15lt1](https://forums.speedlife.net/u/87s15lt1)\ **Post date:** [May 29, 2009, 4:25pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/17 "2009-05-29T16:25:46Z")
how do the hot wires look on the MAF? nice and wirey looking lol. or blue/green burnt ish ---
**Author:** ![Singh](https://avatars.discourse-cdn.com/v4/letter/s/43a26b/32.png) [@Singh](https://forums.speedlife.net/u/Singh)\ **Post date:** [May 29, 2009, 4:37pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/18 "2009-05-29T16:37:34Z")
lol, to get the answer to that question I’ll have to take a detailed look. What i do know is this is a problem that started back in April and gradually gotten worse after each track day, to the point where it is now. ---
**Author:** ![drjeffreys](https://avatars.discourse-cdn.com/v4/letter/d/e9c0ed/32.png) [@drjeffreys](https://forums.speedlife.net/u/drjeffreys)\ **Post date:** [May 29, 2009, 5:39pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/19 "2009-05-29T17:39:44Z")
Im almost positive im encountering the same problem… Its very odd bog low to mid rpm at 1/8 - 1/4 throttle… if i hold it in any gear at 1/4 throttle in that rpm range is just constantly hiccups… feels like its missing or something… its been driving me crazy… To my knowledge it started happening after i did my intake… try swapping your maf out with another… im sure somone would let you do a switcheroo ---
**Author:** ![MIKE-240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mike-240sx/32/5665_2.png) [@MIKE-240sx](https://forums.speedlife.net/u/MIKE-240sx)\ **Post date:** [May 29, 2009, 8:18pm UTC](https://forums.speedlife.net/t/serious-power-loss/124727/20 "2009-05-29T20:18:28Z")
im pretty sure its the maf for both you guys… i just had that prolem and im runnin an intake as well… make sure its on properly dont let the maf or the intake hanging. bolt em up properly [Next page](https://forums.speedlife.net/t/serious-power-loss/124727.md?page=2)