Installed Hooker Lt's..car backfires now....
Re: Installed Hooker Lt's..car backfires now.... Make sure you didn't burn the insulation off any of the wires that run down the passenger side inner fender by the #4 and #6 header primaries... The starter wires, some o2 wires and the crank position sensor wires run down there.
Thread Starter
On The Tree
Joined: Mar 2002
Posts: 121
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From: Dover, PA
Re: Installed Hooker Lt's..car backfires now.... I just pulled all 8 plugs and this is what was found:
plugs #1 and #5 Looked brand new, never used.
plugs #3 and #7 very sootie, almost looked wet
Plugs #2 #4 #6 #8 had soot on them. They looked worse than the ones that were taken out during the header install.
There was no anti sieze on the plug tips. Why plugs #1 and #5 looked brand new, I don't know. Please continue with your input with this.
Thanks
plugs #1 and #5 Looked brand new, never used.
plugs #3 and #7 very sootie, almost looked wet
Plugs #2 #4 #6 #8 had soot on them. They looked worse than the ones that were taken out during the header install.
There was no anti sieze on the plug tips. Why plugs #1 and #5 looked brand new, I don't know. Please continue with your input with this.
Thanks
TECH Addict
Joined: Dec 2001
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From: new england
Re: Installed Hooker Lt's..car backfires now.... Install your origonal plugs and see if problem persists, anti sieze is not your problem, you should run car in dark room and watch for spark leakage also.
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On The Tree
Joined: Mar 2002
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From: Dover, PA
Re: Installed Hooker Lt's..car backfires now.... How would spark leakage develope from a plug change and header install? I am not doubting you, I just would like to understand how it may have happened. What would be the fix for such a problem? Also, should all the original plugs be installed, or just replace the two new plugs, which look as though they never fired since their install?
Thanks
Thanks
TECH Addict
Joined: Dec 2001
Posts: 2,298
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From: new england
Re: Installed Hooker Lt's..car backfires now.... New plugs can be defective, you can crack them when installing without even knowing it. If you run motor in dark you can see spark leakage, you might need a small mirror to see all plugs.I have dumped my stock Y-pipe and motor didnt missfire or backfire at all really, so your problem seems like result of install, not headers affect on how motor runs. I would carefully install all of oem plugs to see if problem goes away.
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Joined: Jan 2002
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From: Lincoln Park Mi
Re: Installed Hooker Lt's..car backfires now.... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SStrokerAce:
<strong>Since the spark plugs only need 11 lbs ft on TQing, why would you put anti-seize on them? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I take it youve never had the peasure of removing a spark plug and seeing the threads from the head still attached to it. Aluminum will do that sometimes.
<strong>Since the spark plugs only need 11 lbs ft on TQing, why would you put anti-seize on them? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I take it youve never had the peasure of removing a spark plug and seeing the threads from the head still attached to it. Aluminum will do that sometimes.
Thread Starter
On The Tree
Joined: Mar 2002
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From: Dover, PA
Re: Installed Hooker Lt's..car backfires now.... I reinstalled the older plugs, and switched the O2 sim extensions (left and right). This morning, Mach Go ( a member of this site) came over with a scanning device to check what codes were set off initially, and to clear them. Codes P0134 and P0300 were identified. The codes were cleared and we started the car. The backfiring was almost nonexistent, however, the SES lite came on again.
(Remember, the backfiring, and inconsistent coloration of the plugs are occuriing on the driver side of the engine)
Code P0300 appeared again, P0134 did not. We checked to insure the wires were installed securely, and started the car again. The SES lite came on. Another code P0300!
Jason has a '98 WS6 with MSD wires so we replaced my #1 and #5 wires with his. (Thinking my plug wires may be bad). Again, we started the car and the SES lite came on. Another P0300 code.
I took out the spark plugs and this is what I saw:
#1 plug clean
#3 plug soot
#5 plug clean
#7 plug semi-sootie
My question: Do I have bad coil packs? If so, how can I check them to be sure before replacing it/them? What else may be causing the misfiring?
Your input is appreciated.
(Remember, the backfiring, and inconsistent coloration of the plugs are occuriing on the driver side of the engine)
Code P0300 appeared again, P0134 did not. We checked to insure the wires were installed securely, and started the car again. The SES lite came on. Another code P0300!
Jason has a '98 WS6 with MSD wires so we replaced my #1 and #5 wires with his. (Thinking my plug wires may be bad). Again, we started the car and the SES lite came on. Another P0300 code.
I took out the spark plugs and this is what I saw:
#1 plug clean
#3 plug soot
#5 plug clean
#7 plug semi-sootie
My question: Do I have bad coil packs? If so, how can I check them to be sure before replacing it/them? What else may be causing the misfiring?
Your input is appreciated.
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Re: Installed Hooker Lt's..car backfires now.... TTT...man this is like a bad dream. I am changing out my friends shorties for hooker long tubes, and your scaring the crap out of me. I wonder if the coil pack removal messed up a ground or something. I am watching this post like a hawk. I hope you get this straightend out soon.
On The Tree
Joined: Mar 2002
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From: York, PA
Re: Installed Hooker Lt's..car backfires now.... I've been trying to help Mike with his problem of miss fire. He is going to try the simple stuff like new wires first. #3 didn't even show any firing at all when we hooked up a timing light. That tells me either it isn't receiving a signal from the pcm to fire or it is grounded out. We did switch coil paks to eliminate the coils and the same thing happens. All wiring "looks" ok...we couldn't find any broken or ripped wires going to the coils. Does anyone know of any test procedures to check the ignition system?
By the way...his LT's look SWEET!!!! They tucked in there real nice!!
(Don't worry Mike...we'll get her going soon!!!)
<img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Jason
By the way...his LT's look SWEET!!!! They tucked in there real nice!!
(Don't worry Mike...we'll get her going soon!!!)
<img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Jason
On The Tree
Joined: Mar 2002
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From: York, PA
Re: Installed Hooker Lt's..car backfires now.... I forgot something...Mike's wife must be a real trooper...not once did she come out and raise hell with us about running the car with open headers...most wives would have called their lawyers by now! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Jason
Jason
Thread Starter
On The Tree
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From: Dover, PA
Re: Installed Hooker Lt's..car backfires now.... I was going to order OEM plug wires from the dealer...$146.00 plus tax <img border="0" alt="[guns]" title="" src="graemlins/gr_guns.gif" /> I ordered MSD wires for half that. Once they come I will be trying them to see if this eliminates the situation. Aslo, I did call the local Chevrolet dealer to see if they would check out the coil packs, just in the event the new wires make no difference. They will check them for free...
Jason and I will keep you posted on how this progresses. Thanks again for all your input, and especially to Jason.
Mike
Jason and I will keep you posted on how this progresses. Thanks again for all your input, and especially to Jason.
Mike
On The Tree
Joined: Mar 2002
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From: York, PA
Re: Installed Hooker Lt's..car backfires now.... Hey Mike...
...How are you making out? Haven't heard from you in a while. I have a few ideas that may eliminate that pesky misfire. Give me a call and I'll run them by you.
Jason
...How are you making out? Haven't heard from you in a while. I have a few ideas that may eliminate that pesky misfire. Give me a call and I'll run them by you.
Jason
Thread Starter
On The Tree
Joined: Mar 2002
Posts: 121
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From: Dover, PA
Re: Installed Hooker Lt's..car backfires now.... An update to the misfire situation....
I took the coil packs to the dealer for testing, they were okay. I had the wire harness and plugs for the coil packs check by an electrician...everything okay there too. I then purchased 2 new O2 sensors...the misfire continues. I still do not have a Y pipe made. Could this be the cause of all this heartache? A damn pipe?
I have crawled over, under, around the engine compartment thinking the problem may be electrical. I can't find anything out of place, nothing!
I will get a Y pipe made up next, however, I will need to have the car towed to the muffler shop. What a PITA. If the problems persists after the Y pipe install, what else could I check? What????
Thanks
I took the coil packs to the dealer for testing, they were okay. I had the wire harness and plugs for the coil packs check by an electrician...everything okay there too. I then purchased 2 new O2 sensors...the misfire continues. I still do not have a Y pipe made. Could this be the cause of all this heartache? A damn pipe?
I have crawled over, under, around the engine compartment thinking the problem may be electrical. I can't find anything out of place, nothing!
I will get a Y pipe made up next, however, I will need to have the car towed to the muffler shop. What a PITA. If the problems persists after the Y pipe install, what else could I check? What????
Thanks
Teching In
Joined: Feb 2002
Posts: 5
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From: syracuse, new york
Re: Installed Hooker Lt's..car backfires now.... I had my hookers installed last week and have not had any problems. I love them. However, I did not put in O2 simulators and the car still has not turned on the SES light. Should I be concerned or should I not worry about it until the light comes on. <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
p.s. I made a custom y-pipe by using a SLP y-pipe and using some extentions to connect it to the headers. Lined up almost perfectly for me and just had to "puff" the pipe extentions from 2 1/2" to 3" to fit the collectors. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
p.s. I made a custom y-pipe by using a SLP y-pipe and using some extentions to connect it to the headers. Lined up almost perfectly for me and just had to "puff" the pipe extentions from 2 1/2" to 3" to fit the collectors. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />