2000 Bravada - sluggish/surging acceleration
2000 Bravada, approx 90,000 miles. Very sluggish acceleration, started out as an intermittent issue, but last day or 2 it's been constant. To the point now where I have to hold it to the floor to maintain 40mph on a flat road. Also, it wont hold a constant RPM under constant throttle - it's a cycle of cutting off and surging. Another thing I noticed, which may or may not mean anything - above 5000 rpm, the volt gauge drops quite a bit and the AC stops running cold.
Ran the codes, and got the following: P0101 P0131 P0143 P0151 P0300 Researched the codes and it appears it could be a myriad of issues from plugs/wires, to O2 and airflow sensors. Any input as to the most likely culprit(s) will be greatly appreciated. Thank you! |
how long ago did you do a tune up on your truck? did you use ac delco parts?
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Originally Posted by xgiovannix12
(Post 444329)
how long ago did you do a tune up on your truck? did you use ac delco parts?
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P0101 - Mass Air Flow System Performance
P0131 - HO2S Circuit Low Voltage Bank 1 Sensor 1 P0143 - HO2S Circuit Low Voltage Bank 1 Sensor 3 P0151 - HO2S Circuit Low Voltage Bank 2 Sensor 1 P030x - Random/Multiple Cylinder Misfire Detected I would look into the power & ground supply for the HO2S sensors from the PCM as defined in the wiring diagrams in the linked to diagnostic threads. A PCM ground issue could cause the MAF & HO2S sensor codes and general poor performance. Look over the diagnostic threads for common diagnostic points. |
i say do a decent tune up check the whole truck over make sure you use delco parts . let us know if that helped it run better
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Originally Posted by swartlkk
(Post 444332)
I would look into the power & ground supply for the HO2S sensors from the PCM as defined in the wiring diagrams in the linked to diagnostic threads. A PCM ground issue could cause the MAF & HO2S sensor codes and general poor performance. Look over the diagnostic threads for common diagnostic points.
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Researched on here and found that the PCM is grounded to the firewall by the brake booster (G117). Checked that out and it's tight and clean as a whistle.
Anything else easy to check before I wave the surrender flag? |
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