I have a 2002 mercury grand marquis and it shudder around 30 to 50 mph I was asked have I unhook the egr valve and I did but no luck and even replace it with a new one. I replace the fuel filter and it stop for like a day and I thought it had something to do with the fuel, but a few days ago the engine light clicked on. So I took it to three different places to get them to read code and all came back saying it was transmission shift control solenoid so I had that replace like two days ago and no luck. To me it seem worst now I can drive down road it shudder and then right after, it stalls and temperature light pops on and goes right out so if there is anyone out there have any idea I need help
have the same problem?
Saturday, October 5th, 2013 AT 9:13 PM