I have a 1995 mtx sho that was leaking oil and it was the oil pump gasket so i replaced it and I started the car and it ran fine with out the y pipe on it then after I put the y pipe on it started running bad it studders when you give it gas and it idles a little strange and the other day the tach was working but it was a little low then it stoped working and went all the way down the went back up and started working again the cel is on but it was on befor i did the work and it ran just fine it seems like the timing is off but I checked and its on so what could be doing this any help would be great thaks
