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06-25-2009, 02:49 PM
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#1
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Join Date: Jun 2005
Posts: 391
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Car not running right at high rpm's
Ok, weird issue, 2002 camaro SS, stock. Car was running perfect, car sat for a couple weeks, finally take it out today. Starts up fine, drives fine until I get on it, hit 4500-5000RPM range and the car just doesn't want to go, almost likes its choked. And at the same time, I hear a rattling noise coming from the drive side, engine bay area, and the Service engine light starts blinking. I get off it, drive fine at the lower rpm range, doesnt make the rattling noise and the service engine eventually stops blinking and goes away.
Oil pressue is fine, car is not over heating.
I bought some octane booster, filled it up with super, drove it around for a little bit, same thing happening.
Anyone ever experience, have any ideas?
Thanks
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2000 WS6 Trans Am
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06-25-2009, 02:54 PM
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#2
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Join Date: Jun 2005
Posts: 391
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So Car has 29K original miles...
Spark Plugs?
Fuel Pump?
Pushrod?
valve spring?
F
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2000 WS6 Trans Am
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06-25-2009, 03:00 PM
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#3
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Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
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Shot in the dark- Possibly a misfire that's clearing. Check the plugs and wires. Maybe you cooked a wire on a header?
Last edited by WildBillyT; 06-25-2009 at 03:01 PM.
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06-25-2009, 03:16 PM
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#4
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Join Date: Jun 2005
Posts: 391
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dont see a burnt wire.. but we'll start simple and change the fuel filter.
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2000 WS6 Trans Am
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06-25-2009, 03:45 PM
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#5
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Join Date: May 2008
Location: Roselle Park, NJ
Posts: 173
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the fuel filter isnt going to fix it...the SES light blinks due to misfire. have the code checked out to see what cylinder it is and go from there...odds are it is a bad wire or the coil is failing
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-Jay-
COD-MW2=X02ssMaroX XBOX LIVE
02 SOMSS-M6-,Volant CAI,TR55's,UMI LCA'S and PHR, Longtubes & TD's w/ sweet thunder bullets 315-35/17's. 349rwhp/372rwtq
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06-25-2009, 04:16 PM
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#6
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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definitely scan the computer and its definitely a misfire. the CEL blinks when you are having a severe misfire.
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06-25-2009, 06:52 PM
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#7
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11 Second Club / I <3 LT1s
Join Date: May 2008
Location: Troy, Mi
Posts: 2,642
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Make sure the plug that connects the coil racks are plugged in securely. Also it wouldn't hurt to pull the valvecovers and take a look at everything~30 mins taking your time.
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Vinnie -
00 SS A4- LQ9/LS3/Stalled/3.42s 1.48/11.10/121 mph<-6spd swap in progress.
13 Silverado Z71- Sold 11/16
99 Z28 M6- -H/C/9in - sold 1/13
99 Silverado Z71- The DD - Sold 7/13
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06-25-2009, 08:32 PM
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#8
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Join Date: Jun 2005
Posts: 391
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P0171 - Car is running lean
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2000 WS6 Trans Am
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06-25-2009, 08:54 PM
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#9
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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thats what i figured. do you have a scan tool that can view live data or freeze frame? you would want the car at operating temp in closed loop and record long term fuel trim, it should be above 23%. then check the o2's, they should be between 200-800mV. check for vacuum, emissions, air intake, and exhaust leaks in front of the o2's.
maybe you should figure out what the rattling noise is first, then get into the nitty gritty.
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06-25-2009, 08:54 PM
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#10
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Join Date: Apr 2009
Location: Hillsborough, NJ
Posts: 1,099
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Sounds something in the fueling isn't correct. So possibly a fuel filter, clogged injector.
Also check vac lines make sure there's no leaks. I've had that code before because a vac line came off.
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-Devin
Whiplash Intense Performance
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06-26-2009, 08:10 AM
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#11
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Stalker
Join Date: Aug 2004
Posts: 12,077
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ahhhh, i hope u find it and get it fixed soon.
..possibly fuel pressure drop..bad pump or maybe regulator
possible loose injector wiring connector or bad injector
or possible bad coil, plug, or wire.
ls1 fuel issues give me nightmares... i had raw fuel coming out my tailpipes... prior to the "incident"... injectors suck... so does shell putting diesel in ur car(they didnt even sell diesel)...::shivers::....
Last edited by V; 06-26-2009 at 08:11 AM.
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06-26-2009, 01:39 PM
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#12
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Join Date: Jun 2005
Posts: 391
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Im thinking loose wire or vac hose. Car was running perfect last time I drove, since then I put the hotchkis strut tower brace on, and may have hit something since it bends towards the back of the engine and I havent driven it since until yesterday..
Ill let you guys know, thanks for the feedback.
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2000 WS6 Trans Am
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06-28-2009, 05:50 PM
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#13
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Join Date: Jun 2005
Posts: 391
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well havent time to do much, but did see a vacuum line off, so put that back on, but still misfiring.
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2000 WS6 Trans Am
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07-01-2009, 07:42 PM
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#14
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13 Second Club
Join Date: Oct 2004
Location: Netcong, NJ
Posts: 5,799
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Dealt with something like this last week. Check the O2 sensors and the wires that go to them.
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2019 Toyota Tacoma TRD Pro ... M6, Voodoo Blue Fun Machine
1987 Pontiac Trans Am ... 305 TPI, T5, Project Car
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07-01-2009, 10:52 PM
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#15
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Join Date: May 2008
Location: Roselle Park, NJ
Posts: 173
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p0171 refers to the bank 1 being lean..check the left side of the intake manifold with the carb cleaner while its running. If that passes then change the O2. My O2 went bad a couple weeks ago and gave me a HORRIBLE misfire...one that I've never seen an O2 cause before.
If your not coming up with a specific cyl. misfire than its probably not an injector, but could still be fuel related.
__________________
-Jay-
COD-MW2=X02ssMaroX XBOX LIVE
02 SOMSS-M6-,Volant CAI,TR55's,UMI LCA'S and PHR, Longtubes & TD's w/ sweet thunder bullets 315-35/17's. 349rwhp/372rwtq
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07-02-2009, 03:48 PM
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#16
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Join Date: Jun 2005
Posts: 391
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Yeah its coming up with Random misfire code now. The fuel filter was just changed, same problem. We'll check the o2 sensors.
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2000 WS6 Trans Am
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07-02-2009, 03:56 PM
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#17
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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did the random misfire set before or after the fuel filter was changed?
it should store the data when the misfire set. i would look at the data stream and see which cylinders are misfiring as well.
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07-05-2009, 07:40 AM
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#18
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Join Date: Jun 2005
Posts: 391
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Well after all has been said and done, it was due to a bad Cat. The cat started rattling really bad and after revving it for a little bit, parts of it started coming out the tailpipe...Now car runs great.. And the cats are still under warranty, 8 years on it. So the dealer will replace it for free...Nice
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2000 WS6 Trans Am
Last edited by Njgunslinger; 07-05-2009 at 07:41 AM.
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07-05-2009, 10:42 AM
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#19
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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hahaha ahhh good stuff!
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07-05-2009, 02:47 PM
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#20
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Join Date: Feb 2005
Location: Orange County NY
Posts: 579
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glad to see you found it. the best part is its a free fix
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2000 Camaro 25.5 Turbo car X275
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07-05-2009, 04:50 PM
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#21
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Join Date: Jun 2005
Posts: 391
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yeah, thanks for your advice though, I appreciate it. I need to bring the TA up to you one day. I think Im going to have hanlon rebuild/upgrade the tranny. It's tired, doesnt shift as well as it used to.
Thanks for everyone putting their thoughts in...definitely helps.
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2000 WS6 Trans Am
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07-05-2009, 06:07 PM
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#22
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Join Date: Feb 2005
Location: Orange County NY
Posts: 579
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same give me a call when ur ready....
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2000 Camaro 25.5 Turbo car X275
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