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?

Does it seem like a misfire or more hesitation? Also is the engine rebuilt or what?

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-Austin-
1988 LE, Intercooled L67 loading......

2000 SSEi R.I.P. Dead now :( INTENSE FWI, polished LIM, P&P supercharger, custom radiator, standalone trans cooler, trans-go shift kit (donating to the 88)

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

Reman. engine quoted wrong milade only 20k on engine, more of a misfire. I'm thinking coil pack or icm.

Check your plugs and wires anyways. You never know.

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-Car Guy Carl
"Penelope" - 2003 SLE - 247k Miles
"Sydney" - 2000 Honda S2000 - 98k miles

Check the fuel pressure at idle with and without the vacuum line on the fuel pressure regulator.

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WHITE WHINE - 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 & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim 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, 3.45 diff and various Camaro suspension bits, LED Taillights

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.

There are $20 varieties of pressure gauges out there.

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WHITE WHINE - 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 & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
2009 G8 GT - Sport Red Metallic, loaded, SOLO Axlebacks, Rotofab Intake, Tuned, autodim 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, 3.45 diff and various Camaro suspension bits, LED Taillights