Hi everyone,
I've had a look around these forums, and found some very interesting answers to similar problems, but was unable to solve my issue.
It started off with the car being left to sit for about 3/4 weeks during the cold weather. Prior to this, everything was running fine. After this time, unsurprisingly, the battery had gone flat, and the car wouldn't start. I charged the battery, and then the car started fine, but the power steering light came on, and the steering was heavy. Having read about that here, I assumed the low battery charge was the culprit as the power steering power steering is electric.
I let the car run at a fast idle for a while to get the alternator charging the battery, and then stopped and started the car again, and the power steering issue cleared.
At this point, I thought all my problems were solved, unfortunately, I then discovered that the car would not rev past 2500rpm. When it hits this point, the revs just drop to idle and the engine warnign light flashes up and then goes out. If I quickly open the throttle the same thing happens.
I borrowed an OBD II reader from a friend, and the only error code was the pre-cat lambda sensor. However, after replacing this, I still have the same problem.
Looking at the output from the OBD II, when it hits the point cut off point, the lambda output is howing the mixture as too rich, where it stays for a couple of seconds and then returns to normal, prior to this, it is normal. Also the coil recharge time spikes for one coil and drops to 0 for the other coil at this moment, then returns to normal, however, it's not always the same coil that spikes or drops.
I'm not sure what is expected from the intake air pressure sensor, but as the throttle opens, the graph output drops. I don't know if this is normal, but it may give a clue?
I have no error codes, I looked at the throttle body and it's not too gummed up, and the butterfly valve moves freely.
Any thoughts on what I could look at next, or what the problem may be? I'm now at a loss.
Any help is greatly appreciated. Thanks!
I've had a look around these forums, and found some very interesting answers to similar problems, but was unable to solve my issue.
It started off with the car being left to sit for about 3/4 weeks during the cold weather. Prior to this, everything was running fine. After this time, unsurprisingly, the battery had gone flat, and the car wouldn't start. I charged the battery, and then the car started fine, but the power steering light came on, and the steering was heavy. Having read about that here, I assumed the low battery charge was the culprit as the power steering power steering is electric.
I let the car run at a fast idle for a while to get the alternator charging the battery, and then stopped and started the car again, and the power steering issue cleared.
At this point, I thought all my problems were solved, unfortunately, I then discovered that the car would not rev past 2500rpm. When it hits this point, the revs just drop to idle and the engine warnign light flashes up and then goes out. If I quickly open the throttle the same thing happens.
I borrowed an OBD II reader from a friend, and the only error code was the pre-cat lambda sensor. However, after replacing this, I still have the same problem.
Looking at the output from the OBD II, when it hits the point cut off point, the lambda output is howing the mixture as too rich, where it stays for a couple of seconds and then returns to normal, prior to this, it is normal. Also the coil recharge time spikes for one coil and drops to 0 for the other coil at this moment, then returns to normal, however, it's not always the same coil that spikes or drops.
I'm not sure what is expected from the intake air pressure sensor, but as the throttle opens, the graph output drops. I don't know if this is normal, but it may give a clue?
I have no error codes, I looked at the throttle body and it's not too gummed up, and the butterfly valve moves freely.
Any thoughts on what I could look at next, or what the problem may be? I'm now at a loss.
Any help is greatly appreciated. Thanks!
