You might have a clogged catalytic converter. It would explain the misfires and the lack of power.
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05-14-2009
You might have a clogged catalytic converter. It would explain the misfires and the lack of power.
05-14-2009
Yeah I would definately check into the engine end of it. The trans not shifting is just a result of the engine running out of steam, otherwise the rpms would have climbed up to roughly 6K rpm and hit a rev limiter if the trans couldnt make the shift.
05-14-2009
Thanks. I got a Tech 2 yesterday and was able to shift the trans correctly and it was crisp and clean. The shift timing was right on. Today I got a EGR open fault, but the next check was clear. I was thinking MAFS until I got the EGR fault, then I was thinking clogged catalytic converter. If I remove it, are there any sensors I would need to bypass/modify?
05-16-2009
If you remove the cat then you will need to either have a rear 02 simulator or change the code enable settings in the tune with a tuner so a code will not set for the rear 02 sensor not being in the loop. Even if you leave the rear 02 in place but put a piece of pipe in place of the cat it will still throw a code after driving for a while.
05-16-2009
Thanks guys. I got a new cat on Friday and put it in today. I did not bypass the O2 sensor, I simply replaced the entire cat asembly from the exhaust manifold back to the resonator (Maremont direct replacement - $201 at AutoZone). The new one was configured to eliminate the big "U" for the O2 sensor which has to help with flow. This car is mostly for transportation, so I wasn't looking to go high performance, just restore it to good operating condition.
The issues are all completely gone. I don't know when it last accelerated as good as it does now. On hard accel, it winds over 6000 rpm and the trans shifts perfectly, and if I let it, it spins the tires on the 1-2 shift.
Thanks again for your help.
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