I am having a problem with the running and acceleration . When I try to accelerate from almost any speed, the motor stumbles and surges, the speedometer goes from the current increasing speed reading to displaying over 100 for a second or so, the SC boost gage is constantly showing a couple lines of boost (even at idle). sometimes when coming to a stop at a light or in traffic the motor will go from idle to RPMs dropping to 200-400 and then die, and then hard to restart. ( Not every time)
As background, I just replaced the motor with a used motor a couple weeks ago, got a couple codes after a couple 100 miles ( missfire cyl 1, and egr code) swapped coil from old motor and cleared codes, ran great for aprox 100 miles then codes came back and started running erratic .
The motor I installed still needs the SC coupler replaced, but need to straighten out all of this first. I drive the car daily 125 miles RT to work.
The SC boost gage showing boost all the time just started tonight on the way home, and it does run differently when on, so I don't think it is a malfunction with the lights.
I have cleared the codes a couple time so far, and it will run fine for almost a full commute, then it shows back up.
HELP !!!! Don't know which way to go from here.
Also, I will have a complete top swap for sale when I get all this straightened out, and the rest of the old motor also. What are these going for these days?
