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98 buick ultra misses under a load. super charger was off for 6 mo. (fixed now). service engine light came on before and after fix on super charger idler pulley. i thought maybe just carboned up from no forced air, but no. only misses on slow acceleration or going uphill in OD. goes away when i stomp on it. 204,000 miles. not really worth an $800 solution. any ideas?
Re: 98 buick ultra misses under a load. super charger was...
Replace plugs and plug wires at the same time to prevent carbon tracking between wires and plugs. Carbon tracking will make a 3800 do what yours is doing. Also put some premium fuel in it for a few days.
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I think he crank sensor is defective, or installed wrong. The cam sensor controls fuel injector timing and
can cause sputtering and hesitation. The timing must be correct for the
injector to fire when the intake valve is opening. Check for any
scratch marks on the cam sensor. In addition, check the cam interrupter
magnet and be sure it in place and not damaged.
The ECM sends a 5-volt reference signal to the
CTS sensor. As temperature changes in the coolant, the electrical
resistance of the CTS sensor also changes. The best way to test this
sensor is with a scanner. When the engine is cold, engine coolant
temperature should measure near the same as the ambient temp. Another
way to test the CTS sensor is to measure voltage from the time the
engine is started, until it warms up. Record the voltage changes as the
engine warms up to operating temp. i.e. 120, 140, 160 & 180. You
should see close to the full range of voltage (5.0-1.0V) during this
test. If it does not change from what you first measured cold, replace
the sensor!
repairpal.com > Problems > Buick > Park Avenue Buick Park Avenue Engine Stalling Due to Mass Air Flow/Crankshift Position Sensor Failure. This is a verified ... 1997 Buick Park Avenue- 3.8L V6160,000Visitor. Engine stalls ... car runs then stalls and won't start for thirty minutes. Upvote (36).
Buick stuttering Questions & Answers - Fixya
www.fixya.com > Forum > Tags > stuttering 94 Buick Park Avenue that stutters under a light load I have a 94 Buick Park Avenuethat ... Buick Century 97 runs rough and stutters when cold and gas applie Engine runs rough ... I have a 1994 buick lesabre it starts ok but stutters and stalls.
If the light is on the engine computer will have a trouble code or codes, which may help you towards solving the problem. Have the computer scanned for the codes. Go from there. Good luck.
If you have already done a tune-up changed the wires, plugs the only other thing i can think of would be the fuel pump. If you have a check engine light on along with the other lights your local advance auto parts would check this at no charge. That may give you a clear view of what is wrong. Hope this helps.
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