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Old 07-29-2011, 04:25 PM   #1
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Reduced engine power

My reduced engine power light keeps coming on. Idk why. I used to think it was my tps but I cleaned the connections and the code went away. The only codes its throwin are for a cooling fan. The light comes on, I have very very very little throttle and the car doesn't go over approximately 30. but if I turn the car off. Wait like 10 seconds and restart. It's perfectly fine again.
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Old 07-29-2011, 04:34 PM   #2
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What year
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Old 07-29-2011, 04:39 PM   #3
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Sorry, 1999 camaro v6.
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Old 07-29-2011, 05:23 PM   #4
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Dude, how long have you been driving it with reduced engine power? That shit is serious.

Anyways... It could be the coil packs, or the Ignition Control Module, or both, or wiring for it.
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Old 07-29-2011, 05:41 PM   #5
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Quote:
Originally Posted by ZexGX
Dude, how long have you been driving it with reduced engine power? That shit is serious.

Anyways... It could be the coil packs, or the Ignition Control Module, or both, or wiring for it.
Well that's the thing. It's so random and rare that it happens that I always think iv fixed it. But it keeps coming back. This week it's happened every day at least once. But like I said, I throw it in neutral turn it off, coast for like 5-10seconds, start it back up and car is fine, light is off. All 3 coil packs have been changed. Iv had it in the shop for it before. They said they couldn't get the light to come up. Whenever I scrap up some money I'm gonna baby it to the shop while the light is on.
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Old 07-29-2011, 05:48 PM   #6
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Could also be bad maf. Unplug the MAF and run it next time. CAr should run decently off the map sensor, mine did (forgot to plug in maf and went for joy ride, LOL didnt feel difference)
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Old 07-29-2011, 05:54 PM   #7
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Ok here comes the noobish questions.. I know MAF is the mass air flow sensor, but where's it located and where do I unplug it at?

EDIT: nvm I looked it up. Will report back soon.
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Old 07-29-2011, 06:06 PM   #8
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MAF would NOT cause reduced engine power to come on and limit the car to 30MPH.
The only time I have had that happen is when there is a misfire on more than 2 cylinders due to a faulty coil pack, or a faulty ICM, or both.
It might also be a low fuel pressure issue, but I've only had RED ENG PWR light up when an ignition component failed.
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Old 07-29-2011, 08:35 PM   #9
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If none of that stuff fixes it (recheck coils, ICM, fuel system), you may consider having the computer itself looked at.

Although it was a PT Cruiser, my sister had a similar problem that was caused by her PCM randomly forgetting to send the "fire" signal to one of her coil packs. She was driving on the interstate the first time it happened: turned the car off and back on and it was fine, but there was no code and three mechanics and a dealership couldn't reproduce the problem. It ran fine for several weeks before it happened again and even after 2 new sets of coil packs, plugs, wires, and a full fuel system clean, it was determined her PCM had a fault in it and had to be replaced (under warranty, luckily). Good luck and let us know what you find
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Old 07-29-2011, 10:07 PM   #10
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Wel I unplugged the maf and besides running a little rough, there was so much more response and pull(for a v6). After like 45 minutes of driving the light never came on like it has lately. So I'm gonna start with replacing that tomorrow.

But I'm gonna keep an eye out for it zex. If you say that can't be the cause I believe you. But I'm still gonna replace the maf because that seems to be shot too. Lol
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Old 07-30-2011, 06:11 PM   #11
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Ugh I didn't know the maf sensor was almost 200 bucks.
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Old 07-31-2011, 01:55 AM   #12
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Quote:
Originally Posted by Zach+'maro=:) View Post
Ugh I didn't know the maf sensor was almost 200 bucks.
Where are you in Indiana? Indianapolis and Evansville have some good pullaparts where you'll likely find a "good" MAF for under $20.
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Old 07-31-2011, 03:31 AM   #13
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I'm by fort Wayne. There's a decent one by new haven. I just haven't had a chance to go up. I'm always working
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Old 07-31-2011, 01:06 PM   #14
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Dont replace the MAF if the MAF cant cause reduced engine power. I thought it could, but Zex says it can't so thats not your problem.
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Old 07-31-2011, 07:45 PM   #15
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Hmm. Yea I trust you guys. It hasn't acted up. I'll keep a lookout.
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Old 08-01-2011, 12:16 PM   #16
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Quote:
Originally Posted by Zach+'maro=:) View Post
Hmm. Yea I trust you guys. It hasn't acted up. I'll keep a lookout.
Yeah, well, I'd say keep following whatever lead is bringing you good results, even if that's the MAF. Just make sure that the one you replace it with is the same, and the "filaments" look clean.
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Old 08-01-2011, 03:22 PM   #17
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Well light came back on once. So I plugged the maf back in. Car was running fine then bad misfire. Ses blinking, the works. Checked codes. Cylinder 3 misfire. I changed the coil pack for it about a couple months ago. Called the shop. And he asked me if I checked the spark plugs. I told him no I have to be at work soon I don't have the time but I was lookin at it while on the phone, pulled the plug off the coil for cylinder 3, and burnt rusty lookin powder came out and the plug looked shot. I told him and he said that's probably what the problem is. So it goes in wednesday so he can take a better look at things. I was thinking though I had a tune up about a year ago. I looked at the paper and spark plugs got changed. But not wires. hoping that's the problem.
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Old 08-03-2011, 06:41 PM   #18
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I mustve had a faulty coil pack because the shop ended up having to replace it again and changed all my shot wires. drives great and no more reduced engine power light
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Old 08-03-2011, 06:44 PM   #19
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Quote:
Originally Posted by Zach+'maro=:) View Post
I mustve had a faulty coil pack because the shop ended up having to replace it again and changed all my shot wires. drives great and no more reduced engine power light
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Old 08-03-2011, 07:27 PM   #20
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Lol thanks for the help
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