WOT stumble
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Abbby
- SSE Member
- Posts: 105
- Joined: Thu Jul 26, 2012 7:36 pm
- Year and Trim: 2003 SLE 208,000 miles
2003 SLE 196,000 miles
WOT stumble
I have two 2003 Bonnevilles and they both do this. If I floor it at around 60mph once the RPM's get to about 4000 the engine starts stumbling/surging. They both run great and get good gas mileage.
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Alpine_jake
- SLE Member
- Posts: 78
- Joined: Sun Feb 10, 2013 12:56 pm
- Year and Trim: 2003 SLE
- Location: Winona, MN
Re: WOT stumble
codes? your saying its missfiring?
l67 swap; 3'DP, power log, CAI, 10.5 wires, 3.5" pulley, autolite 104s, canned tune, 180 thermo, 2 Alpine type Xs, ARC Audio XDi 2000, Big three-0/1 , couple Red Tops, alpine x303, cleared lights, custom trunk.
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Abbby
- SSE Member
- Posts: 105
- Joined: Thu Jul 26, 2012 7:36 pm
- Year and Trim: 2003 SLE 208,000 miles
2003 SLE 196,000 miles
Re: WOT stumble
No codes. Not sure if it is misfire but definetly something not right. Kind of like bumping up against a rev limiter.
Re: WOT stumble
This is in the common problems doc:
Loss of power in higher RPM’s
Problem: The car has a loss of power at higher RPM’s, stalls and chokes out when giving throttle.
Solution: The catalytic converter is plugged, not allowing the exhaust gases to release from the engine. Replacement cat is required.
Estimated Cost: $50-70 for aftermarket cat (OEM cats cost hundreds), $20-50 for installation labor.
Loss of power in higher RPM’s
Problem: The car has a loss of power at higher RPM’s, stalls and chokes out when giving throttle.
Solution: The catalytic converter is plugged, not allowing the exhaust gases to release from the engine. Replacement cat is required.
Estimated Cost: $50-70 for aftermarket cat (OEM cats cost hundreds), $20-50 for installation labor.
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Archon
- Resident Gearhead
- Posts: 8781
- Joined: Mon May 19, 2008 10:30 pm
- Year and Trim: 2014 Cadillac XTS Vsport.
- Location: Grand Rapids, Michigan
Re: WOT stumble
May also want to check for vacuum leaks, and fuel pressure at the higher rpms. If you haven't lately, it wouldn't hurt to replace the fuel filter.
*Gone, but not forgotten* - Black 2000 SSEi, HIR Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, 180 degree thermostat, HS 1.9 rockers, LSx yellow springs, Intense FWI, PCM, shift kit, push rods, and 3.4 Pulley. ZZP Power Log.
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Abbby
- SSE Member
- Posts: 105
- Joined: Thu Jul 26, 2012 7:36 pm
- Year and Trim: 2003 SLE 208,000 miles
2003 SLE 196,000 miles
Re: WOT stumble
Do you know if the $50-70 aftermarket is a universal one or bolt up? Where would one buy this. Be nice to have bolt up versus universal that needs modification to fit.