2000 Bravada - sluggish/surging acceleration
#1
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!
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!
#2
how long ago did you do a tune up on your truck? did you use ac delco parts?
#3
#4
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.
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.
#5
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
#6
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.
#7
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?
Anything else easy to check before I wave the surrender flag?
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kennyking927
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08-29-2014 12:17 AM
tlmatney
2nd Generation S-series (1995-2005) Tech
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06-17-2009 06:16 PM
03, 2000, acceleration, blazer, bravada, cheverolet, forum, intermittently, p0131, p0143, p0151, s10, sluggish, surges, surging