- Mar 29, 2014
- 8
Hello everyone,
I am new to this site. New to forums, actually.
I just got a 2002 Bravada. Drove it from Virginia to Illinois over the weekend, On Tuesday the engine developed a problem. I will list the vehicle info and symptoms. I appreciate any help in diagnosing the problem.
- Car has 164,000 miles on it.
- Check engine light came on. Sometimes will flash for a couple minutes at a time.
- Engine lost power, ran and idled rough, but still drives.
- Took it to Autozone for code diagnostics, it showed the following codes:
- P0171
- P0300
- P0340
- The engine makes a sound under load similar to air escaping. Kind of like an exhaust leak.
- I changed the plugs, fuel filter and cleaned the throttle body. Same problem, though it seems to run slightly stronger.
- Cylinder 3 had oil on the threaded part of plug.
- Cylinder 4 had oil residue in the plug well. I expect I need to change the valve cover gasket but don't see that this is the problem.
- When the Check Engine Light is on, the cruise control doesn't work.
- Oil, dipstick and cap show no evidence of coolant.
Research I've done tells me this could be:
- Bad head gasket
- Cam position sensor
- Bad rings
- Bad coils (would that make the engine sound I'm hearing?)
- ?????
Thanks for any thoughts.
I am new to this site. New to forums, actually.
I just got a 2002 Bravada. Drove it from Virginia to Illinois over the weekend, On Tuesday the engine developed a problem. I will list the vehicle info and symptoms. I appreciate any help in diagnosing the problem.
- Car has 164,000 miles on it.
- Check engine light came on. Sometimes will flash for a couple minutes at a time.
- Engine lost power, ran and idled rough, but still drives.
- Took it to Autozone for code diagnostics, it showed the following codes:
- P0171
- P0300
- P0340
- The engine makes a sound under load similar to air escaping. Kind of like an exhaust leak.
- I changed the plugs, fuel filter and cleaned the throttle body. Same problem, though it seems to run slightly stronger.
- Cylinder 3 had oil on the threaded part of plug.
- Cylinder 4 had oil residue in the plug well. I expect I need to change the valve cover gasket but don't see that this is the problem.
- When the Check Engine Light is on, the cruise control doesn't work.
- Oil, dipstick and cap show no evidence of coolant.
Research I've done tells me this could be:
- Bad head gasket
- Cam position sensor
- Bad rings
- Bad coils (would that make the engine sound I'm hearing?)
- ?????
Thanks for any thoughts.