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PROBLEM- car has been making weird mis fire noise (machine gun sound) for months.----------------------------------------------------------------------------I changed the spark plugs 3 times and noise still comes after engine get some boost--------------------------------------------------------------Thought it might be the powerdyne bearings going but I still get good boost, I decided to take off the outlet pipe to see if the problem was the supercharger or not.-------------------------------------------------------------------------------Noise is gone now....The charger is still spinning cas all I did was take off the pipe. That also means the bearings are defiently fine cas the noise would still be there.------------------------------------------------------------------------Car is bascicly running stock now (sucks...I didnt realize how much of a difference it was when your blown till now) So I have narrowed the problem down to these things.-----------------------------------------------------------------1-AIR= The air from the charger is just too much for my exhaust right now for whatever reason... exhaust leak... Pressure???----------------------------------------------------------------------2-FUEL= The added air from my charger tells the FMU to send in 100-120 pounds of fuel pressure vrs the 45-60 pounds Im presently seeing now. The powerdyne SHOULD get roughly between 70-90 fuel psi so Im defiently running rich. But why did that fuel pressure work so good for me before months ago???? The first day I heard this machine gun noise from the exhaust was immediently after using a 104 octane booster from Chevron with my gas. Possibility of running rich and using octane booster every since then a bad deal for me?------------------------------------------------------------------3-BROKEN STUFF= The AIT sensor in my outlet pipe is completely melted. No way it's reading anything. Possibly causing the ecu to not know whats going on and mismatch the air and gas????-------Oil pressure sendind unit/ switch is completely missing. My mechanic says that when the ecu cant read the oil presuure that it can tell the fuel to shut off for saftey reasons.---------------------------------------------------------------4-I KNOW= Those are both easy fixes and I will get them done ... BUT am I missing anything????? I know many of you are much more knowledgeable on FI than me (although you do learn alot real quick when moneys involved and stuff dosent work right, He he) but Hell man some of you have BUILT your own FI systems so who am I right. Please give me any pointers that you thank could also need to be checked.... ---------------------------------------------------------------------------It's very personal to me to figure this thing out now. You TURBO guys are doing so good now that Im gonna have to get this thing to drop my time 1.5 seconds better than my before time to even be close to your before and after times. Dam turbos!!!!!!!! I remember when dropping a secong from FI was a decent deal, Then YOU GUYS had to jump the standard up to 2 seconds off your before time. BASSSTTTAAARRRDDDZZZZZZZZ!!!! HE HE just kidding but please help if you can guys.
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Powerdyne 98 a4 convert<br /><br /> stock 16.6 @ 86 <br /> <br /> 6 lbs boost 15.1 @ 90 <br /> <br /> 04 A4 2.73 geared white Corvette Coupe<br /> <br /> stock- 13.5 @ 103 <br /><br />LS6 conversion-13.1 @ 107 <br /> <a href=\"http://members.cardomain.com/greenglow98\" target=\"_blank\">http://members.cardomain.com/greenglow98</a> ( pics of intercooled powerdyne) -
[img]graemlins/naughty.gif[/img]AIM: escalier deverre<br />\'02 Pearl Blue Metallic RSX-S (daily driver)<br />\'98 Black Firebird<br />98 V6 turbocharged to 02 LS1 swap<br />\'02 LS1/4L60E<br />LS6 Block, LS6 Intake Manifold, Thunder Racing 215/220 .600/.523/115 Cam, Titanium Retainers, Crane Double Valve Springs, 125 shot NX Wet Kit w/ NOS brand Purge, True Dual \"H\" Pipe w/ two chambers and dumps, 17x11(rear) and 17x9.5(front) Black Powdercoated ZR1 Replicas on 315 and 275 BFGoodrich Comp T/A\'s (Street)/ET Drags/Skinnies on Weldlites(Track), 3.42/LSD -
Hey xjarayax..... Me and you are kinda in the same boat man.... Ive got the slowest charger and you got the slowest turbo... He he. And we both got similar problems from what I understand. I read in one of your post somthing about an exhaust leak.... What was happening exactly???? Oh BTW I know your 14.3 is ***** slappin my 15.1 but you dropped 1.4 seconds so far and I dropped 1 second so far....HHHMMM... I thank our before and afters are actually even closer cas with stock rims on instead of the 18's my time would have defiently been faster than the second I dropped. OK Ive decided to make you my arch turbo nemisis type friend deal and secretly thank of ways to make my before and after time surpass you. Mahahahwa......BTW that Gremlin was evil ya Bassstttarrrdddd. He hePowerdyne 98 a4 convert<br /><br /> stock 16.6 @ 86 <br /> <br /> 6 lbs boost 15.1 @ 90 <br /> <br /> 04 A4 2.73 geared white Corvette Coupe<br /> <br /> stock- 13.5 @ 103 <br /><br />LS6 conversion-13.1 @ 107 <br /> <a href=\"http://members.cardomain.com/greenglow98\" target=\"_blank\">http://members.cardomain.com/greenglow98</a> ( pics of intercooled powerdyne)Comment
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[img]graemlins/stickpoke.gif[/img]00\' firebird v6 5spd<br />201rwhp ---- 230 rwtq<br />\"Everyday I grow stronger...and further from you.\"<br />WARNING: Do not take any of my comments seriously unless they are technical in nature and then only at your own riskComment
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Greenglow i would give you my technical advice and input and what not, but i refuse to help you due to your car man. I love almost all camaros but i have to say that i wouldnt be caught dead in yours. It makes me want to get sick to my stomach, what in the world made you decied to do that to such a beautiful car?2002 M5 camaro- VTR CAI, custom cat-back exhaust, battery compacitor, pullie, lowering springs, 32mm sway bar, cross-drilled slotted rotars. 1-10\" L7 in cubby.Comment
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<blockquote>quote:</font><hr>Originally posted by Ender2664:
Greenglow i would give you my technical advice and input and what not, but i refuse to help you due to your car man. I love almost all camaros but i have to say that i wouldnt be caught dead in yours. It makes me want to get sick to my stomach, what in the world made you decied to do that to such a beautiful car?<hr></blockquote>
dont think that was called for dude. :rolleyes:Past Ride
1995 Firebird A4 3.8 Turbocharged -- 12.50 at 108
(If you dont know me, you haven't had a V6 long enough)
Current Ride
2006 Mitsubishi Evolution GSR
www.myspace.com/shane1015Comment
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you might be having spark blow out, OR, just not getting enough fuel, is fuel pressure still that high? if so rule that out.Comment
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<blockquote>quote:</font><hr>Originally posted by 98GREENGLOW:
Hey xjarayax..... Me and you are kinda in the same boat man.... Ive got the slowest charger and you got the slowest turbo... He he. And we both got similar problems from what I understand. I read in one of your post somthing about an exhaust leak.... What was happening exactly???? Oh BTW I know your 14.3 is ***** slappin my 15.1 but you dropped 1.4 seconds so far and I dropped 1 second so far....HHHMMM... I thank our before and afters are actually even closer cas with stock rims on instead of the 18's my time would have defiently been faster than the second I dropped. OK Ive decided to make you my arch turbo nemisis type friend deal and secretly thank of ways to make my before and after time surpass you. Mahahahwa......BTW that Gremlin was evil ya Bassstttarrrdddd. He he<hr></blockquote>
OK well if we're arch enemies then so far I am kicking your *** .
I will be proving my 13secondness Wedsnday night.
You're turn next.
[ November 10, 2003: Message edited by: xjarayax ]</p>AIM: escalier deverre<br />\'02 Pearl Blue Metallic RSX-S (daily driver)<br />\'98 Black Firebird<br />98 V6 turbocharged to 02 LS1 swap<br />\'02 LS1/4L60E<br />LS6 Block, LS6 Intake Manifold, Thunder Racing 215/220 .600/.523/115 Cam, Titanium Retainers, Crane Double Valve Springs, 125 shot NX Wet Kit w/ NOS brand Purge, True Dual \"H\" Pipe w/ two chambers and dumps, 17x11(rear) and 17x9.5(front) Black Powdercoated ZR1 Replicas on 315 and 275 BFGoodrich Comp T/A\'s (Street)/ET Drags/Skinnies on Weldlites(Track), 3.42/LSDComment
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lol..
anyways.. i have no experience with FI.. but my car sounds like a machine gun..
i have an exhuast leak96 Camaro M5. Dark metallic gree (?dont know the offical color name)<br />Home made Intake :: Headers, 3inch headers back to Flowmaster muffler :: spec stage 3 clutch Now installed, waiting for 3.42\'s and LSD next month<br /><a href=\"http://photobucket.com/albums/y192/RiceEatingCamaro/?action=view¤t=newcar.jpg\" target=\"_blank\">My Car</a> <br /><br />Totalled Car.<br /><a href=\"http://bellsouthpwp.net/s/k/sk8er305/\" target=\"_blank\">96 CamaroRS</a>Comment
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<blockquote>quote:</font><hr>Originally posted by Tyler:
lol..
anyways.. i have no experience with FI.. but my car sounds like a machine gun..
i have an exhuast leak<hr></blockquote>
Me too.. [img]graemlins/stickpoke.gif[/img]AIM: escalier deverre<br />\'02 Pearl Blue Metallic RSX-S (daily driver)<br />\'98 Black Firebird<br />98 V6 turbocharged to 02 LS1 swap<br />\'02 LS1/4L60E<br />LS6 Block, LS6 Intake Manifold, Thunder Racing 215/220 .600/.523/115 Cam, Titanium Retainers, Crane Double Valve Springs, 125 shot NX Wet Kit w/ NOS brand Purge, True Dual \"H\" Pipe w/ two chambers and dumps, 17x11(rear) and 17x9.5(front) Black Powdercoated ZR1 Replicas on 315 and 275 BFGoodrich Comp T/A\'s (Street)/ET Drags/Skinnies on Weldlites(Track), 3.42/LSDComment
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where is your leak at?
my ****ty paper exhaust manifold gaskets that pacesetter gave me blew out...96 Camaro M5. Dark metallic gree (?dont know the offical color name)<br />Home made Intake :: Headers, 3inch headers back to Flowmaster muffler :: spec stage 3 clutch Now installed, waiting for 3.42\'s and LSD next month<br /><a href=\"http://photobucket.com/albums/y192/RiceEatingCamaro/?action=view¤t=newcar.jpg\" target=\"_blank\">My Car</a> <br /><br />Totalled Car.<br /><a href=\"http://bellsouthpwp.net/s/k/sk8er305/\" target=\"_blank\">96 CamaroRS</a>Comment
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<blockquote>quote:</font><hr>Originally posted by Tyler:
where is your leak at?
my ****ty paper exhaust manifold gaskets that pacesetter gave me blew out...<hr></blockquote>
Where my turbo y pipe connects to my manifolds. But yeah sounds basically like a machine gun noise that increases porportionally with RPM.AIM: escalier deverre<br />\'02 Pearl Blue Metallic RSX-S (daily driver)<br />\'98 Black Firebird<br />98 V6 turbocharged to 02 LS1 swap<br />\'02 LS1/4L60E<br />LS6 Block, LS6 Intake Manifold, Thunder Racing 215/220 .600/.523/115 Cam, Titanium Retainers, Crane Double Valve Springs, 125 shot NX Wet Kit w/ NOS brand Purge, True Dual \"H\" Pipe w/ two chambers and dumps, 17x11(rear) and 17x9.5(front) Black Powdercoated ZR1 Replicas on 315 and 275 BFGoodrich Comp T/A\'s (Street)/ET Drags/Skinnies on Weldlites(Track), 3.42/LSDComment
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Machine gun sound?? Under the hood? I'm thinking detonation, spark knock, ping....
If so, then you need to take out some timing advance. Or you're running lean.
I'm thinking timing. The IAT sensor issue may be making the pcm think the air is cold, and it may be bumping the timing up.
Some autotap monitoring will show you the o2 readings for the rich/lean question, and the knock retard will tell you if the pcm is trying to remove timing advance.\'98 A4 Camaro v6->v8 conversion, and STS kit next<br />v6: 13.6 Powerdyne, 13.2 150 shot, 13.8 120 shot, 14.3 85 shot, 15.7 stock<br />v8(na): 12.18@113, 392rwhp<br />Moderator on <a href=\"http://www.mtfba.org\" target=\"_blank\">www.mtfba.org</a> and <a href=\"http://www.frrax.com\" target=\"_blank\">www.frrax.com</a> (Road Race & Autocross)<br /><a href=\"http://community.webshots.com/user/johnduncan10\" target=\"_blank\">Car pics</a>, <a href=\"http://www.trscca.com\" target=\"_blank\">TN Region SCCA</a>Comment
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No, it's definately an exhaust leak. I've had it before and I can feel it with my hand. Just need to get ahold of a 14mm deep socket so I can fix it.AIM: escalier deverre<br />\'02 Pearl Blue Metallic RSX-S (daily driver)<br />\'98 Black Firebird<br />98 V6 turbocharged to 02 LS1 swap<br />\'02 LS1/4L60E<br />LS6 Block, LS6 Intake Manifold, Thunder Racing 215/220 .600/.523/115 Cam, Titanium Retainers, Crane Double Valve Springs, 125 shot NX Wet Kit w/ NOS brand Purge, True Dual \"H\" Pipe w/ two chambers and dumps, 17x11(rear) and 17x9.5(front) Black Powdercoated ZR1 Replicas on 315 and 275 BFGoodrich Comp T/A\'s (Street)/ET Drags/Skinnies on Weldlites(Track), 3.42/LSDComment
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<blockquote>quote:</font><hr>Originally posted by xjarayax:
No, it's definately an exhaust leak. I've had it before and I can feel it with my hand. Just need to get ahold of a 14mm deep socket so I can fix it.<hr></blockquote>
oh, sorry... I was trying to answer the 'original' post in the thread. [img]smile.gif[/img]\'98 A4 Camaro v6->v8 conversion, and STS kit next<br />v6: 13.6 Powerdyne, 13.2 150 shot, 13.8 120 shot, 14.3 85 shot, 15.7 stock<br />v8(na): 12.18@113, 392rwhp<br />Moderator on <a href=\"http://www.mtfba.org\" target=\"_blank\">www.mtfba.org</a> and <a href=\"http://www.frrax.com\" target=\"_blank\">www.frrax.com</a> (Road Race & Autocross)<br /><a href=\"http://community.webshots.com/user/johnduncan10\" target=\"_blank\">Car pics</a>, <a href=\"http://www.trscca.com\" target=\"_blank\">TN Region SCCA</a>Comment
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So my truck is finally getting some work done, after 17 years, Oil pressure sensor went out and it’s located under the lower intake manifold. Have to...2 weeks ago
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