tranny, or cat converter ? - Saturn Sky Forums: Saturn Sky Forum
Technical Saturn Sky Discussion Technical and performance aspects of the Saturn Sky Roadster. Sky Problems | Solutions | Repairs | Recalls | Tech Bulletins | Tech Tips | In the Manual Basic Tech Advertisement

User Tag List

 2Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 23 (permalink) Old 01-14-2018, 09:55 PM Thread Starter
Member
 
darbonnesky's Avatar
 
Join Date: Jan 2018
Location: Farmerville, La.
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
tranny, or cat converter ?

07 sky, 92 K

engine light came on, did diagnostic and it said my cat. converter had issues. I am trying liquid fuel additive first before next step. However. is it possible that this issue is tied to the cat conv. ??
when I give it the gas to pass, the transmission doesn't know what to do, it either stays put and does not downshift for passing, or into passing gear but does not speed up.

about three years ago I changed a (relay) that was on recall that made the transmission do the same thing.
it's the timing of the engine light and transmission abnormalty that confuses me.

any ideas ? Thanks for your input.
darbonnesky is offline  
post #2 of 23 (permalink) Old 01-17-2018, 08:18 AM
Supporting Vendor
 
Dave@ddmworks's Avatar
 
Join Date: Oct 2007
Posts: 680
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
Send a message via Yahoo to Dave@ddmworks
Quote:
Originally Posted by darbonnesky View Post
07 sky, 92 K

engine light came on, did diagnostic and it said my cat. converter had issues. I am trying liquid fuel additive first before next step. However. is it possible that this issue is tied to the cat conv. ??
when I give it the gas to pass, the transmission doesn't know what to do, it either stays put and does not downshift for passing, or into passing gear but does not speed up.

about three years ago I changed a (relay) that was on recall that made the transmission do the same thing.
it's the timing of the engine light and transmission abnormalty that confuses me.

any ideas ? Thanks for your input.
If you can post up the code you are getting, that would help, is it a P0420 code?

Also, what other modifications are done to your car? That would help also.

Thanks,
Dave

Dave Michel
DDMWorks
Sales - 864-438-4949
Tech Support - 864-907-6004

WWW.DDMworks.com
[email protected]
Stage 3 Supercharged 2.4L - 314whp - 93 octane
Rotrex Supercharged 2.4L - 340whp - 93 octane
2871 Hybrid turbo 2.0L - 371whp - 93 octane
[email protected] is offline  
post #3 of 23 (permalink) Old 01-18-2018, 12:00 PM Thread Starter
Member
 
darbonnesky's Avatar
 
Join Date: Jan 2018
Location: Farmerville, La.
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
P0420 low efficiency bank 1.

I have no modifications.
tks. very much for your input Dave.

Retired happy
darbonnesky is offline  
post #4 of 23 (permalink) Old 01-18-2018, 12:31 PM
Super Moderator
 
Robotech's Avatar
 
Join Date: May 2006
Location: Temecula, CA
Posts: 10,429
Mentioned: 58 Post(s)
Tagged: 3 Thread(s)
Quoted: 1607 Post(s)
Garage
The P0420 code is most likely a bad cat. Dave will correct me if I'm mistaken, but I believe it was a bad O2 sensor you would have other codes with it. Is this a 2.0 Turbo Redline or 2.4 NA?

If the cat is clogged, you could definitely see performance issues and this condition would throw that code.

For more info:
https://www.obd-codes.com/p0420


V.A.L. (#1108)
2007 2.4 Base
MagnaFlow dual outlet, quad tip exhaust test car
**Sold**

Max (#1547)
2007 TURBO 2.4
Too much to list here. See my Garage for details.
Robotech is offline  
post #5 of 23 (permalink) Old 01-18-2018, 03:49 PM Thread Starter
Member
 
darbonnesky's Avatar
 
Join Date: Jan 2018
Location: Farmerville, La.
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
2.4

I will use the full tank of gas with the best fuel system cleaner on the market. we'll see if it helps.

will me driving it hurt anything at all. I plan on having our Sky for a while. to much fun!!!

Retired happy
darbonnesky is offline  
post #6 of 23 (permalink) Old 01-18-2018, 04:25 PM
Super Moderator
 
Robotech's Avatar
 
Join Date: May 2006
Location: Temecula, CA
Posts: 10,429
Mentioned: 58 Post(s)
Tagged: 3 Thread(s)
Quoted: 1607 Post(s)
Garage
Fuel system cleaner won't help a bad cat or a failed sensor I'm sorry to say. This kind of issue is more serious than what those treatments can resolve.

If the cat is blocked, it CAN be detrimental to the engine since hot exhaust gasses cannot easily escape through the exhaust like they should. How much of a problem is this? Good question as I really don't know. If it is just a bad sensor...which the way your car is behaving I would think it is the cat and not the sensors, then it would depend on which sensor is bad. If it is the rear one, it will not harm anything as the rear is only there to check for proper cat operation. If it is the front, many bad things can happen since the front one is a critical component in determining how much fuel the computer adds to the incoming air mixture to achieve a proper air to fuel ration. Too rich and the car runs poorly and you build up too many deposits in the heads and cylinders with prolonged use (and possibly other bad things). Too lean and things can go REALLY bad. When you hear of catastrophic engine failures, a lean condition can be a factor.

Either way I'd have it looked at. At the very least, have the cat inspected. It's a pretty quick job of getting the car in the air, dropping the front of the exhaust (2 bolts) then dropping the cat (3 bolts up top, 2 bolts below) and looking side it for damage.

If you have a bad O2 sensor, chances are you'd receive a different code however, if you don't mind spending the money, you can replace both O2 sensors. They run about $50 each. A new cat can be $400-$800. If you don't work on your own car expect about an hour shop charge to change sensors. I have no idea what they charge for a cat swap. I know a full turbo swap has a 7.5 hour book rate.
darbonnesky likes this.


V.A.L. (#1108)
2007 2.4 Base
MagnaFlow dual outlet, quad tip exhaust test car
**Sold**

Max (#1547)
2007 TURBO 2.4
Too much to list here. See my Garage for details.
Robotech is offline  
post #7 of 23 (permalink) Old 01-19-2018, 05:13 PM Thread Starter
Member
 
darbonnesky's Avatar
 
Join Date: Jan 2018
Location: Farmerville, La.
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
thank you very much for your input. sounds like my income tax refund is toast. but on the positive side, there is money to fix the issue.
I just wish I could get an easy fix for my heater control problem.
love our sky, just wish she would not have these issues.

07 92k

i'm 65 and have my issues too. lol

Retired happy
darbonnesky is offline  
post #8 of 23 (permalink) Old 01-20-2018, 01:00 AM
Super Moderator
 
Robotech's Avatar
 
Join Date: May 2006
Location: Temecula, CA
Posts: 10,429
Mentioned: 58 Post(s)
Tagged: 3 Thread(s)
Quoted: 1607 Post(s)
Garage
Good news is that if you go with an aftermarket cat you can save some money. They are a lot cheaper than the stock cat new. Just make sure you are familiar with how the Sky is supposed to be jacked up as chances are shops in your area may not be familiar with the procedure. Improper jacking can crack and break your front fenders.


V.A.L. (#1108)
2007 2.4 Base
MagnaFlow dual outlet, quad tip exhaust test car
**Sold**

Max (#1547)
2007 TURBO 2.4
Too much to list here. See my Garage for details.
Robotech is offline  
post #9 of 23 (permalink) Old 01-20-2018, 08:02 PM Thread Starter
Member
 
darbonnesky's Avatar
 
Join Date: Jan 2018
Location: Farmerville, La.
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
understood. priced them today $ 249. and I believe I can replace myself.
should I change 02 front sensor also to be sure, or wait till new cat. proves to work ?

Retired happy
darbonnesky is offline  
post #10 of 23 (permalink) Old 01-22-2018, 10:57 AM
Super Moderator
 
Robotech's Avatar
 
Join Date: May 2006
Location: Temecula, CA
Posts: 10,429
Mentioned: 58 Post(s)
Tagged: 3 Thread(s)
Quoted: 1607 Post(s)
Garage
Damn that seems pricey for the 2.4's O2 sensors.
tallcraig likes this.


V.A.L. (#1108)
2007 2.4 Base
MagnaFlow dual outlet, quad tip exhaust test car
**Sold**

Max (#1547)
2007 TURBO 2.4
Too much to list here. See my Garage for details.
Robotech is offline  
post #11 of 23 (permalink) Old 01-22-2018, 05:37 PM Thread Starter
Member
 
darbonnesky's Avatar
 
Join Date: Jan 2018
Location: Farmerville, La.
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
no sir that was for the cat. converter.

however, I changed the front 02 sensor this morning to see if that would relieve the problem.
I took it for a short ride and the issues described on my original post still exist. do I need more miles for the sensor to "do it's thing" or am I headed to a new cat converter.

I still think the tranny has something to do with this, strange.

tks.

Retired happy
darbonnesky is offline  
post #12 of 23 (permalink) Old 01-23-2018, 03:49 PM
Super Moderator
 
Robotech's Avatar
 
Join Date: May 2006
Location: Temecula, CA
Posts: 10,429
Mentioned: 58 Post(s)
Tagged: 3 Thread(s)
Quoted: 1607 Post(s)
Garage
Like I mentioned, it sounds like a clogged cat. Changing the front O2 sensor would be an immediate change. You can unplug your battery for 10 minutes to reset the codes and see if they come back (or just reset them with a code reader if you have one) but the symptoms you describe still sound like a clogged cat.

And that's a great price for the cat.


V.A.L. (#1108)
2007 2.4 Base
MagnaFlow dual outlet, quad tip exhaust test car
**Sold**

Max (#1547)
2007 TURBO 2.4
Too much to list here. See my Garage for details.
Robotech is offline  
post #13 of 23 (permalink) Old 01-23-2018, 05:59 PM
Member
 
Join Date: Feb 2014
Location: Corpus Christi, Tx
Posts: 30
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Garage
I have an '07 NA with a few more miles than you have Darbonnesky. My cat failed. I was like you and was hesitant to replace it. what finally convinced me was my son bought me a wifi ODB2 reader and Dashcommand software for my phone.
it let me see the values that both O2 sensors were reporting.
the lead O2 voltage should bounce all over the place, the one you care about is the rear O2 sensor. It should be at or below .8V I believe... mine would top out at 1.0 volt or higher. this showed that the efficiency was shot. (the cat also turned out to be 10 - 15% plugged).
I replaced the cat and both O2's since i was there. no problems since.

the wifi ODB2 reader is easy to find on Amazon or ebay.

Tony
Long Road is offline  
post #14 of 23 (permalink) Old 01-24-2018, 11:12 AM
Super Moderator
 
Robotech's Avatar
 
Join Date: May 2006
Location: Temecula, CA
Posts: 10,429
Mentioned: 58 Post(s)
Tagged: 3 Thread(s)
Quoted: 1607 Post(s)
Garage
Thanks for that info Long Road. Nice to have some sort of baseline to read on the O2s for this kind of thing. I know the front O2's proper readings but never knew what the rear should be and how to tell if it isn't reporting properly.


V.A.L. (#1108)
2007 2.4 Base
MagnaFlow dual outlet, quad tip exhaust test car
**Sold**

Max (#1547)
2007 TURBO 2.4
Too much to list here. See my Garage for details.
Robotech is offline  
post #15 of 23 (permalink) Old 01-27-2018, 09:16 AM Thread Starter
Member
 
darbonnesky's Avatar
 
Join Date: Jan 2018
Location: Farmerville, La.
Posts: 19
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
thanks a bunch for that info. been out of town for 5 days, but will jump on this. I ordered the new cat, and the rear 02 sensor is in stock. will work on this and see where it goes.
again, tks.

Retired happy
darbonnesky is offline  
Reply

  Saturn Sky Forums: Saturn Sky Forum > Saturn Sky Discussion > Technical Saturn Sky Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Saturn Sky Forums: Saturn Sky Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome