Post header install, car bogging
Post header install, car bogging After my header and plug install, when my car pulls in to a parking space it starts to bog. Really anything at a low RPM involving the power steering pump power drain. It doesn't die, but definitely bogs. I pulled codes from my computer, while the light is off, I've got codes from both front O2s. Could the extensions be too long? Is my .55 gap too small?
Staging Lane
Joined: Jan 2004
Posts: 65
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From: Annapolis, MD Fmrly Lansing, MI
Dunno how long you have been driving it after the install, but if you do not do an idle relearn 'drive cycle', you may get eradic results for a FEW miles. Then the car should relearn and be fine.
FWIW,
SSN8R
FWIW,
SSN8R
TECH Enthusiast
Joined: Jun 2003
Posts: 720
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From: So Cal
Originally Posted by ShadowLightCSU
TTT. anyone?
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i had no problems whatsoever with mine immediatly after installing them so i doubt its a tuning issue though if you dont have the o2's mixed up like what was said im not really sure what to tell you.
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Verdad Gallardo TECH Enthusiast
Joined: Jun 2003
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From: So Cal
Originally Posted by foff667
i had no problems whatsoever with mine immediatly after installing them so i doubt its a tuning issue though if you dont have the o2's mixed up like what was said im not really sure what to tell you.
SHADOWLIGHT- I doubt just porting or adding a different TB will help your situation at the present. Your PCM is thrown off because of the addition of LT's to your car. Adding a TB might even throw it off more.
The factory PCM can only adjust to changes to a certain point; even more so with a car such as mine, being that the 98's had more restrictive manifolds than later year models. Not to mention the deletion of the CATS which also frees up the restriction as well. So when you add LT's and delete the cats, the stock programming cannot adjust to such a great change. Although, some PCM's seems to adjust better than others, which might be the case with foff667's set up.
The PCM will adjust slightly the more you drive the car, but some mods are just to much as far as change and variables are concerned. For instance, if someone went from Hooker shorties to Hooker LT's the change in A/F would be minimal so the stock PCM could adjust within those parameters. There are always other variables that could be the problem. My reasoning and my examples are in a "best" case scenario. One could have a bad O2 sensor, or an O2 sensor might not be screwed in far enough, or your extentions could be bad, etc, etc.
However, dyno tuning can diagnose and/or fix all of these problems through trial and error, so that is why I've opted to get a professional to give my car a baseline tune. First, for the headers, and secondly, for all my future mods.
If one knows where to begin, one can more easily find the end.
I don't think it could be the PCM just disliking the headers, she ran like a champ with the Macs I used to have. Would it be almost a safe bet to assume the sensors got banged up?
Headers shouldn't cause a problem like you described. Have you checked all the connections plugs, wiring etc.... To me it sounds like the EGR is taking a crap. Do you still have EGR??
Check the tube going into the intake manifold. Theres a rubber seal that could have got kinked...make sure its seated good. That happen to me. I fixed it that..but I still had the problem of the rpms dropping like you described. I ended up replacing my egr fixed the problem. Not sure whats going on with yours though since your pulling o2 codes. Hit me up if your on AIM LS1MONSTER
Did you disconnect your battery during the install? I don't care what anybody says, anytime you install some of the bigger mods on your car, disconnect your battery. I disconnect both +/- terminals and connect the two together with some test leads. It's supposed to clear all memory in the computer, as well as take out any static electricity in the PCM.
Now this may not be your problem, but like I said, I do it everytime. I've never had a problem, car runs awesome. Go back through your install and keep it simple.
Did you use 02 sims?
Rob
Now this may not be your problem, but like I said, I do it everytime. I've never had a problem, car runs awesome. Go back through your install and keep it simple.
Did you use 02 sims?
Rob
Originally Posted by BAD *** TA WS6
Did you disconnect your battery during the install?
Rob
Rob
Rob, won't this kill the radio memory, causing me to have to pay through the nose to have GM send me the unlock code?
Yep, well I still have my radio card. It's never been a problem, if you don't have it, it's something that is useful anyhow. I'm not sure of what GM number to call on the telephone, but there is a radio VIN on the back of your HU. Get that, and you should be able to call and do it all over the phone.
It's pretty much a necessity to disconnect the battery during a major install. Without doing so, it confuses the PCM and has to go into WTF mode for awhile, until it figures out what the hell happened.
It's pretty much a necessity to disconnect the battery during a major install. Without doing so, it confuses the PCM and has to go into WTF mode for awhile, until it figures out what the hell happened.
