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PostPosted: Sat Mar 15, 2014 8:10 pm 
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LE Member

Joined: Wed Mar 07, 2012 8:31 pm
Posts: 5
Year and Trim: 2003 ssei
2003 ssei recently replaced cat, mass air flow, and O2 sensor (downstream), engine has about 38k miles on it. Replaced engine mounts last summer. Not seeing any codes,checked all hoses for leaks, none. Car runs great with moderate acceleration, but if you jump on it , it really breaks up. The bolt under the coil paks was over torked and broke. Wires and plugs 38k, car doesn't use any oil or antifreeze, oil pressure about 40 at idle. Sort of driving me nuts.

Will repair the bolt under coil pack this week.

What do you think?


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PostPosted: Sat Mar 15, 2014 8:38 pm 
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Posts like an L27
Posts like an L27

Joined: Wed May 02, 2012 3:29 pm
Posts: 705
Location: Lincoln, NE
Year and Trim: 1988 LE
2000 SSEi
Does it seem like a misfire or more hesitation? Also is the engine rebuilt or what?

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-Austin-
1988 LE, also the project car. Polkaudio everything. Mostly restored interior. Gonna be my sisters for awhile.

2000 SSEi, My new DD. INTENSE FWI, dirty carpet, leaky trunk, the weirdest door dent, and it's all mine!!!!!! Soon to come lots of cleaning and PM.

2002 2500HD Silverado with the 8.1 Vortec and Alison tranny. Likes to eat GT Mustangs and lots of tires, and all while stock!


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PostPosted: Sat Mar 15, 2014 9:36 pm 
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LE Member

Joined: Wed Mar 07, 2012 8:31 pm
Posts: 5
Year and Trim: 2003 ssei
Reman. engine quoted wrong milade only 20k on engine, more of a misfire. I'm thinking coil pack or icm.


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PostPosted: Sun Mar 16, 2014 12:21 am 
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Certified Bonneville Nut
Certified Bonneville Nut
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Joined: Mon May 10, 2010 6:11 pm
Posts: 5344
Location: Chicago, IL
Year and Trim: 2003 SLE
Check your plugs and wires anyways. You never know.

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PostPosted: Sun Mar 16, 2014 12:33 pm 
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Joined: Mon May 19, 2008 7:01 pm
Posts: 15826
Location: Central Illinois
Year and Trim: 1992 SSE
2009 G8 GT
Check the fuel pressure at idle with and without the vacuum line on the fuel pressure regulator.

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WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Sub, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angle Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser.


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PostPosted: Sun Mar 16, 2014 1:27 pm 
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SLE Member
SLE Member

Joined: Thu Jul 26, 2012 7:36 pm
Posts: 59
Year and Trim: 2003 SLE 160,000 miles
2003 SLE 98,000 miles
Both of my 2003 SLE's have an issue when you jump on it. Both well maintained and in great running condition. 40-50MPH push pedal to floor and the vehicle is a tiger until about 4200-4400 RPM and it just starts stumbling and bucking. Seems not so prevaelant at lower speeds. Only thing I have not checked is fuel pressure. Too cheap to buy a gauge. Both have new fuel filters.


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PostPosted: Sun Mar 16, 2014 5:58 pm 
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Joined: Mon May 19, 2008 7:01 pm
Posts: 15826
Location: Central Illinois
Year and Trim: 1992 SSE
2009 G8 GT
There are $20 varieties of pressure gauges out there.

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Image
WHITE WHINE - IT'S INTOXICATING. 1992 SSE Supercharged 236.26 ci (.040 Over)
15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR, Easy Performance Gen 3 Air/Fuel Calibrator, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers and 10" Sub, 1300 watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angle Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, McCoy Motorsports Ceramic Coated Ported Exhaust Manifolds, Fan Override, PowerSlot Slotted Rotors.
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim Trailblazer mirror, removed intake manifold cover, HSV GTS triple gauge pod, two tone red-hot shifter and HSV SuperSport steering wheel, GXP rear sway bar and diffuser.


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