Cobra st,t,t,tuters at high RPM
So, car has always runs awesome, but the other day while getting on the freeway i noticed that it doesn't want to pull all the way to redline like normal. At about 4k it starts...missing? Not really sure how to describe it, but it does not have the power it should and it feel slightly rough. I can still pull it to redline, but there is definitely something wrong. At the same time the tach started to flutters up and down by about 100RPM all the time. Not a lot but enough that it is annoying and made me wonder if the two things were connected.
I did my research and concluded that it must be the PIP sensor since the tach seemed to be getting crappy reading (it gets it's reading of the PIP, right?). So i got a new one, pulled the distributor, and replaced it. Got the timing all set right, took it out for drive and there was no change.
Checked fuel pressure to make sure that was good. 30 PSI. Also i have A/F gage (narrow band) and it reads richer than normal at WOT (~11). All this points to an ignition issue i think.
Also pulled the codes and the only thing i got 172 (O2 fault/lean bank #1) for the KOER (key on engine running) test. KOEO passed and there was nothing stored.
I'm at a loss. What do you guys think?
So, car has always runs awesome, but the other day while getting on the freeway i noticed that it doesn't want to pull all the way to redline like normal. At about 4k it starts...missing? Not really sure how to describe it, but it does not have the power it should and it feel slightly rough. I can still pull it to redline, but there is definitely something wrong. At the same time the tach started to flutters up and down by about 100RPM all the time. Not a lot but enough that it is annoying and made me wonder if the two things were connected.
I did my research and concluded that it must be the PIP sensor since the tach seemed to be getting crappy reading (it gets it's reading of the PIP, right?). So i got a new one, pulled the distributor, and replaced it. Got the timing all set right, took it out for drive and there was no change.
Checked fuel pressure to make sure that was good. 30 PSI. Also i have A/F gage (narrow band) and it reads richer than normal at WOT (~11). All this points to an ignition issue i think.
Also pulled the codes and the only thing i got 172 (O2 fault/lean bank #1) for the KOER (key on engine running) test. KOEO passed and there was nothing stored.
I'm at a loss. What do you guys think?