Post header install ????
Thread Starter
Melting Slicks
Joined: Jan 2005
Posts: 2,604
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From: Phoenix, Arizona
Originally Posted by Zix
I never got to hear the excessive popping though...I say we disconnect that hose again so I can hear it... 
Got the ol' SES light on the way to work this a.m. I can't @#$!ing win.
Lookin' forward to findin' out what that's all about.
@#$!er's runnin' great. Why God Why????
btw...Left Merle a detailed message in regards to my ground wire predicament. Hasn't returned my call...yet. hmmmmm?
Last edited by JEFNLSA; Jan 5, 2006 at 03:35 PM.
Thread Starter
Melting Slicks
Joined: Jan 2005
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From: Phoenix, Arizona
Originally Posted by Nathan Plemons
SES could be anything and is likely very trivial.
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Bring it by EM this Saturday to fix the wire and Trevor can pull the code for you to see what's going on. I doubt it's anything to worry about, but I know it's annoying! Or you can always stop by Bills to use his scanner to pull the code if you don't want to wait!
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
Originally Posted by JEFNLSA
Update:
Figured out the problem w/ the excessive popping/backfiring after the header install. I'm no expert mechanic so bear w/ me on the explanation. Trevor @ EM made a custom air tube that runs between the two headers. There is a fitting/hose that comes off the tube and runs to the air pump. Somehow the hose wasn't attached and as soon as we re-attached it...
BINGO 100% better. Although there still is some mild popping if you let off @ high rpms, the difference is like night & day. Not to mention the car runs 10x better. Trevor & Zix (Jay) explained to me how this could have a big effect on the PCM & fuel mxtures etc... Moral of the story, problem solved. It's like a completely different car. I knew that what I was hearing/feeling was more than what was being described by others w/ headers. Thx for the help...
Jeff
Figured out the problem w/ the excessive popping/backfiring after the header install. I'm no expert mechanic so bear w/ me on the explanation. Trevor @ EM made a custom air tube that runs between the two headers. There is a fitting/hose that comes off the tube and runs to the air pump. Somehow the hose wasn't attached and as soon as we re-attached it...
BINGO 100% better. Although there still is some mild popping if you let off @ high rpms, the difference is like night & day. Not to mention the car runs 10x better. Trevor & Zix (Jay) explained to me how this could have a big effect on the PCM & fuel mxtures etc... Moral of the story, problem solved. It's like a completely different car. I knew that what I was hearing/feeling was more than what was being described by others w/ headers. Thx for the help...Jeff
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Jeff's car is an LT4 so there is no EGR to worry about. What was accidently left disconnected on his car is the tube that runs from the Air pump to a T-connector by the air fitting on the driver side header. Just an oversight as most of the cars I've seen have the Air pump system turned off in the computer so that t-connector is usually removed.
Instructor
Joined: Jun 2003
Posts: 160
Likes: 2
From: Indiana
Originally Posted by Lv2xlr8
Same exact thing happened to my car after installing LT's and no cats. The popping went away though after driving for couple days. Now it ony pops when engine is still cold and letting off throttle.
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Safety Car
Joined: Feb 2004
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From: Minneapolis MN
Originally Posted by JEFNLSA
Probably is BUT I've been suffering in SES h*ll (.02 related) for quite awhile and I thought, w/ the addition of the headers and the offending .02 replaced, I was finally rid of the problem. All I can do is scan & pray. I wanna be emissions ready by July and the SES is my only obstacle.
Thread Starter
Melting Slicks
Joined: Jan 2005
Posts: 2,604
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From: Phoenix, Arizona
Update:
Ran a code scan last night and pulled that same ol' PO152 - .02 Sensor High Voltage. I know it's not the sensor cuz it's been replaced and the same code is still there. Car runs incredible and when hooked to a top-dollar scanner, that reads all the info, it shows AOK on everything. Baffling!
I've had that PO152 for about a year now and no matter what mods I've done - headers, Hotcam, new .02's., custom tune, full tune-up - the #$@!er still shows up!
Don't get me wrong, I'm lovin' the car BUT I'm this close to perfection and...
I've had that PO152 for about a year now and no matter what mods I've done - headers, Hotcam, new .02's., custom tune, full tune-up - the #$@!er still shows up!
Don't get me wrong, I'm lovin' the car BUT I'm this close to perfection and...
Last edited by JEFNLSA; Jan 6, 2006 at 10:04 AM.
Thread Starter
Melting Slicks
Joined: Jan 2005
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From: Phoenix, Arizona
Originally Posted by Nathan Plemons
Can you just turn that code off?
Race Director
Joined: May 2001
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Originally Posted by JEFNLSA
Good question. If there's a way I'm all ears. My main & really only concern is passing emissions. I have until July to get my car code free.
Thread Starter
Melting Slicks
Joined: Jan 2005
Posts: 2,604
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From: Phoenix, Arizona
Originally Posted by Red_Vette_93
Hey Jeff on your webpage the sound bite of the car, is that before or after you installed the headers?
Car looks Good
Car looks Good
That's an old clip before headers or hotcam. The pics are not up to date either. Time to redo...cam, headers, tires, rotors, shifter, spare tire delete & lowering etc.. all new
btw...Car sounds completely different now. Much better.
Last edited by JEFNLSA; Jan 6, 2006 at 11:25 AM.
Thread Starter
Melting Slicks
Joined: Jan 2005
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From: Phoenix, Arizona
Originally Posted by Nathan Plemons
In some states all you need to do to pass emissions is to plug up a scan tool and have it report no codes. An OBDI car with full emissions equipment can fail because it has to take a sniffer test while an OBDII car can pass without any emissions equipment simply because it doesn't set any codes. It's just not fair I tell you!
That is how emissions works here in Phx. OBD2 just requires a code scan. That is how I am getting away w/ no cats (sorry Bogus
). Regardless, I still need to be code free so somehow I need to rid myself of this PO152. At this point and especially since the car runs so well I'd be all for erasing that from the PCM but how?
Thread Starter
Melting Slicks
Joined: Jan 2005
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From: Phoenix, Arizona
Originally Posted by Nathan Plemons
You'd have to have somebody who can program the PCM turn off those codes. Who did your tune?
Is this a simple thing that a local shop w/ Tunercat - kinda like LT1 Edit - could do for me? Otherwise, I need to send my pcm back to him.
Safety Car
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From: Howell N.J. Home of Redgar
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Originally Posted by JEFNLSA
That would be great if that's all it is. It's freakin' embarassing...I spent alot of money on this upgrade and my car is poppin' & spittin' all over the place. I'll check it out after work. Thx...
Jeff , why don't you go with 2 R/T High flow cats this should help a bit ....I have them on my set up and there is very little popping from back presure and I have no muffs...good luck and congrats on the new set up !
Race Director
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Because even with high flow cats it is well documented that you can still set codes on the second set of O2 sensors. It may not solve his problem and it would cost more money. The only reason to do that would be if you wanted to be environmentally friendly, and who wants to do that (Bogus )
)