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27 Posts
Hi everyone.
I decided to start a new thread because my other one was a few weeks old now.
I have a 2003 Taurus Wagon. About 6 weeks ago I was trying to pass someone on the highway and the car started bucking and hesitating right around 4,000-4,200 RPM.
I posted on here about it and got some advice.
Here is what I have done to the car in the order it was done:
1. New spark plugs
2. New plug wires
3. New air filter
4. New fuel filter
These were done first, and all at the same time. After that, the problem seemed to be a bit "smoother," but was still there and very noticeable.
After that, we put in a new coil pack and that did absolutely nothing. My mechanic has a pretty good working relationship with the AutoZone here, so he bought one new, tested it, then took it back to them.
I drove the car for a couple of weeks after that because at anything other than highway speeds and high RPMs it still drives like a dream. Finally, it gave me a check engine light. Bad catalyst on bank 2.
So I found out the catalytic converter was still under warranty and took it to the dealership. Today I got the car back with a brand new catalytic converter, the ones that attach directly to the exhaust manifolds.
On the way home, the car is STILL doing the same thing. The guy at the Ford dealership said that it seemed like there was a problem with the rev limiter, and that for some reason it was engaging even while the car was in gear.
I'm stuck on what to do, now. The dealership told me the O2 sensors on the car were still good, so those haven't been replaced. I also haven't replaced the downstream catalytic converter.
Has anyone ever heard of a rev limiter for some reason engaging while the car was in gear?? If so, what is the fix for that??
Any suggestions would be greatly appreciated.
Thanks.
Jeff
I decided to start a new thread because my other one was a few weeks old now.
I have a 2003 Taurus Wagon. About 6 weeks ago I was trying to pass someone on the highway and the car started bucking and hesitating right around 4,000-4,200 RPM.
I posted on here about it and got some advice.
Here is what I have done to the car in the order it was done:
1. New spark plugs
2. New plug wires
3. New air filter
4. New fuel filter
These were done first, and all at the same time. After that, the problem seemed to be a bit "smoother," but was still there and very noticeable.
After that, we put in a new coil pack and that did absolutely nothing. My mechanic has a pretty good working relationship with the AutoZone here, so he bought one new, tested it, then took it back to them.
I drove the car for a couple of weeks after that because at anything other than highway speeds and high RPMs it still drives like a dream. Finally, it gave me a check engine light. Bad catalyst on bank 2.
So I found out the catalytic converter was still under warranty and took it to the dealership. Today I got the car back with a brand new catalytic converter, the ones that attach directly to the exhaust manifolds.
On the way home, the car is STILL doing the same thing. The guy at the Ford dealership said that it seemed like there was a problem with the rev limiter, and that for some reason it was engaging even while the car was in gear.
I'm stuck on what to do, now. The dealership told me the O2 sensors on the car were still good, so those haven't been replaced. I also haven't replaced the downstream catalytic converter.
Has anyone ever heard of a rev limiter for some reason engaging while the car was in gear?? If so, what is the fix for that??
Any suggestions would be greatly appreciated.
Thanks.
Jeff