Car is Detuning itself
#1
Car is Detuning itself
Hello all,
My car seems as it is detuning itself from time to time.
In the Morning, the car runs normally and after about 15 minutes of driving, it feels sluggish.
I also have the CEL come on every so often, but when I pull codes, it gives me an 05 05.
I just changed the front 3 spark plugs and need to get the rear 3.
My Car is supercharged by the way running standard pulleys.
I am guessing it may be the knock sensor but I get no ghost codes for it, MAF, or coilpacks?
Any help is greatly appreciated.
Sorry I didn't do the install so I don't have much info on the supercharger set up. Redline Max installed it so Addae should have the info. I'll see if i can't get it.
The mods I have are:
V2 supercharger kit with FMIC, blowoff valve, custom 3" exhaust from headers back, ground kit, exedy stage 1 clutch, fidanza flywheel, and a bunch more.
My car seems as it is detuning itself from time to time.
In the Morning, the car runs normally and after about 15 minutes of driving, it feels sluggish.
I also have the CEL come on every so often, but when I pull codes, it gives me an 05 05.
I just changed the front 3 spark plugs and need to get the rear 3.
My Car is supercharged by the way running standard pulleys.
I am guessing it may be the knock sensor but I get no ghost codes for it, MAF, or coilpacks?
Any help is greatly appreciated.
Sorry I didn't do the install so I don't have much info on the supercharger set up. Redline Max installed it so Addae should have the info. I'll see if i can't get it.
The mods I have are:
V2 supercharger kit with FMIC, blowoff valve, custom 3" exhaust from headers back, ground kit, exedy stage 1 clutch, fidanza flywheel, and a bunch more.
#2
It's my understanding that only a Scan tool will show the knock sensor ghost code. Checking codes via the ECU will show nothing. That's how it was for me as well.
So you're saying that at WOT, your car doesn't quit feel as fast? Have you checked for any obvious vacuum/boost leaks?
So you're saying that at WOT, your car doesn't quit feel as fast? Have you checked for any obvious vacuum/boost leaks?
#4
I haven't check for boost leaks but it only happens from time to time.
I'm not sure if it is detuning itself but there is a loss of power. For example, on a level road going 50mph in fifth gear I accelerate and the car quickly moves to 60mph.
10 minutes later, I try the same thing on the same stretch of road and it feels like a freaking geo metro, crawling its way to 60. I think it may be the knock sensor.
I'm not sure if it is detuning itself but there is a loss of power. For example, on a level road going 50mph in fifth gear I accelerate and the car quickly moves to 60mph.
10 minutes later, I try the same thing on the same stretch of road and it feels like a freaking geo metro, crawling its way to 60. I think it may be the knock sensor.
#5
Originally Posted by The Wizard
It's my understanding that only a Scan tool will show the knock sensor ghost code. Checking codes via the ECU will show nothing. That's how it was for me as well.
So you're saying that at WOT, your car doesn't quit feel as fast? Have you checked for any obvious vacuum/boost leaks?
So you're saying that at WOT, your car doesn't quit feel as fast? Have you checked for any obvious vacuum/boost leaks?
#6
^^Guess my car is special?? ![Confused](https://maxima.org/forums/images/smilies/confused.gif)
OP, what your describing could be the coilpacks. How does the car sound as you go WOT? When I had bad coilpacks, I heard strange noises coming from under the hood (at WOT). Can you swap coilpacks with a friend and recheck? When I swapped coilpacks with Ptatohed, my car became alive and became consistently fast.
![Confused](https://maxima.org/forums/images/smilies/confused.gif)
OP, what your describing could be the coilpacks. How does the car sound as you go WOT? When I had bad coilpacks, I heard strange noises coming from under the hood (at WOT). Can you swap coilpacks with a friend and recheck? When I swapped coilpacks with Ptatohed, my car became alive and became consistently fast.
#7
Originally Posted by The Wizard
^^Guess my car is special?? ![Confused](https://maxima.org/forums/images/smilies/confused.gif)
OP, what your describing could be the coilpacks. How does the car sound as you go WOT? When I had bad coilpacks, I heard strange noises coming from under the hood (at WOT). Can you swap coilpacks with a friend and recheck? When I swapped coilpacks with Ptatohed, my car became alive and became consistently fast.
![Confused](https://maxima.org/forums/images/smilies/confused.gif)
OP, what your describing could be the coilpacks. How does the car sound as you go WOT? When I had bad coilpacks, I heard strange noises coming from under the hood (at WOT). Can you swap coilpacks with a friend and recheck? When I swapped coilpacks with Ptatohed, my car became alive and became consistently fast.
#8
Originally Posted by The Wizard
^^Guess my car is special?? ![Confused](https://maxima.org/forums/images/smilies/confused.gif)
![Confused](https://maxima.org/forums/images/smilies/confused.gif)
99 could be a bit different since it's kind of a hybrid year between the 98 and 00 when the 5th gen came in. I've tested each year 4th gen except 99 so perhaps my statement applies only to 95-98?
![got me](https://maxima.org/forums/images/smilies/ne_nau.gif)
Anyways, sorry to go OT a bit... got that EU in yet?
![Wink](https://maxima.org/forums/images/smilies/wink.gif)
#13
Originally Posted by i30ds
Dude, you don't need an OBII reader. Just use the screw driver method.
#14
Originally Posted by EteRnity059
I did and it showed 05 05 and I reset the CEL. It hasn't come back so I hope it just fixed itself.
#16
Originally Posted by DandyMax
Hmm.. so you're saying you couldn't get any codes at all out of the 99 with a screwdriver? Or you could get codes but never the KS?
Originally Posted by DandyMax
Anyways, sorry to go OT a bit... got that EU in yet? ![Wink](https://maxima.org/forums/images/smilies/wink.gif)
![Wink](https://maxima.org/forums/images/smilies/wink.gif)
![run](https://maxima.org/forums/images/smilies/runaway.gif)
OP, any luck solving your problem?
#17
Supporting Maxima.org Member
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iTrader: (3)
Join Date: Oct 2002
Location: Ontario, Canada
Posts: 1,204
Originally Posted by The Wizard
Now, several members have told me that the 95-98 connector won't plug into my 99 ECU. I have not verified this yet, so it seems the 98 wiring harness (16") I bought (with connector) and 96 ECU (to rape it's connector from) is all for not. In the end, I need to start comparing what I bought to what I have....![run](https://maxima.org/forums/images/smilies/runaway.gif)
![run](https://maxima.org/forums/images/smilies/runaway.gif)
The pinouts are different though, but everyone knows that..
#20
Originally Posted by EnervinE
I spy a knock sensor code ![Frown](https://maxima.org/forums/images/smilies/frown.gif)
Evap system code is the same one that I got. Unscrew your gas cap and it should let out some air. Put it back on and the code will be gone.
![Frown](https://maxima.org/forums/images/smilies/frown.gif)
Evap system code is the same one that I got. Unscrew your gas cap and it should let out some air. Put it back on and the code will be gone.
#21
Originally Posted by EteRnity059
so I had my car check and I have a severely clogged EGR valve and Evap system is leaking. I should hopefully have these fixed by next week.
Codes
P0400
P0440
P0325
P1448
Codes
P0400
P0440
P0325
P1448
![Confused](https://maxima.org/forums/images/smilies/confused.gif)
#22
Originally Posted by The Wizard
You originally stated you only had 0505, but now you have 4 new codes?
What changed in the last week?
![Confused](https://maxima.org/forums/images/smilies/confused.gif)
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