- Dec 5, 2011
Will install and report back soon....
I shouldn't worry about the fine scratches should I?
I shouldn't worry about the fine scratches should I?
berto1014 said:How much benefit would this have on a vehicle like ours?
Also, I am never able to remove the main plug in on the throttle body when I remove it. Any wisdom on how to remove it? I feel like I am putting to much force on it.
Pittdawg said:Apparently its dynoed 6-10 rwhp on the 3.7 liter I5 so I would have to imagine you can bump up that range to 8-12 rwhp with our engine having an additional cylinder over the I5. I haven't installed it yet but the instructions indicate to use a flathead screwdriver to assist in removing the main plug.
07Blazerman said:I thought as much, I talked to James about getting one for my TB after I purchased the Supersparkz. 8-12 hp sounds interesting, let us know how she idles after the install and if the throttle response increases.
07Blazerman said:How are the idle issues now? Smooth out at all?
Pittdawg said:I continued to have idle issues so I disconnected the negative terminal on the battery overnight as James originally suggested and not the "mere" 6 or so hours I disconnected it for the second time around. James also indicated that the idle would be high when I first start the vehicle so to wait 10 minutes or so until the idle settles back down to the normal ~600 rpms. I followed his instructions exactly and was very excited when I first drove off that the throttle response was greatly improved. Whether or not this mod adds horsepower it certainly noticeably increases throttle response.
The only issue I am still having is when I first start the vehicle in the morning it still has a very high idle, anywhere from 1000-1400. After driving for just a few minutes the idle settles right back in at the normal 600. Additionally, if I take another trip within a few hours of my original trip, the idle is normal when I start the vehicle. Again, the high idle is only when it is either cold in the morning and/or when the vehicle itself has been "idle" for an extended period of time. I'm hoping that this idle issue remedies itself at some point in the near future as the pcm continues to adapt. Can anyone who cleaned a very dirty throttle body chime in as to whether or not it took some time for the startup idle to even out?
Worst case scenario I have high idle everytime I start the vehicle in the morning for 2 minutes or so. After that 2 minutes, the idle is silky smooth at ~600 rpms and the throttle response is dramatically improved. Right now I give the mod a solid B, if the idle issue resolves itself I will give it an "A" for sure.
I would love to hear from people who cleaned very dirty throttle bodies and how their idle was for the first week or so to see if my issue is run of the mill. Thanks.
smitty5150 said:Not sure where to find it on the newer I6's, but on my 02, it is on the back side of the intake tube. Almost sounds to me like you may have had them remove just a little to much material from the throttle body.
Pittdawg said:Let me start off by saying that I have only done the very simple tasks on my vehicle myself, such as removing the roof rack, removing chrome side moldings, installing PCMforless pcm/tcm etc. Because of my lack of experience, I was intimidated to install the throttle body myself so I paid a local shop (too much!) to install the throttle body for me. Well, the 1000 rpm pedal vibration was driving me crazy so I watched the how to clean your throttle body video twice and built up the courage to open things up myself and look for anything missing, especially vacuum hoses. Of course, the stupid shop failed to attach a hose! Here is a picture of a hose just below the intake resonator that I found not installed!!! It is installed in this picture because I fixed it myself! What a waste of money paying that shop to do it wrong when I could have done it myself! Lesson learned, besides the more complicated tasks, I'm doing the relatively simple stuff myself from now on! I only drove it for a couple blocks but the pedal vibration is completely gone and my Envoy no longer sounds like a diesel when slowly accelerating from a stop or going in reverse.
I still need to see if it idles high upon start up but in my hours and hours of pouring over old posts, it seems as though some stock I6's idle high (1200) for a minute or two upon start up before settling in at 600 rpms and some do not. I'm nearly certain that attaching this hose will resolve all issues. It idled and purred buttery smooth on the short drive I just took
07Blazerman said:How's it been running with the hose reconnected?
Pittdawg said:Better but not quite there yet. It still idles high upon start up for a few minutes until the engine warms up which I don't think will change.
As far as the pedal vibration/resonance at 1000 rpms, this is the bigger issue and it is still there. I thought it was gone but it is just "less noticeable" after I attached the hose. I'm actually hoping at this point its the motor mounts since I still have a little warranty left. I'm considering taking it to the stealer and having them check the motor mounts but I'm concerned they might trace it to the throttle body.
07Blazerman said:I wonder if it is worth talking to Kelly and Marshall at pcmforless. I know with my T/A when I ran the 52mm throttle body, I didn't have idle issues even without the pcm programmed for it, but when I stepped up to the 58mm I had a high and erratic idle until the pcm was programmed for it. As for the dealer I would just have them check the mounts and nothing else, I know there is a way to check them yourself and save the trip. I remember seeing a writeup from Roadie on it.
ScarabEpic22 said:Im a little skeptical, about 2 years ago we looked on the OS about porting I6 tbs, but one guy who did a bunch of LSx ones said there's not really enough extra material to warrant porting one. If you're happy then Im happy for you, but toss it on a dyno with the stock tb then throw this one on and see if it makes more power (or how much).
Honestly Id retune the PCM to compensate for the increase in airflow, the ECM is going to see a different amount of air entering the engine vs what it commands because of the increase in diameter. 08-09s this is a piece of cake to fix, 02-07s might have a little harder time but shouldnt be too bad.
gmcman said:Sweet! Looks very good.
Just curious, if I find a TB from a junker and use that for a port job, would I need to have the new TB re-adapted?
Do you need to have any TB re-adapted if it's removed from the harness?
Our VW needed everything re-adapted which has me concerned.