Got a surge/miss and no codes

Joey7508

Member
Oct 23, 2005
198
0
17
Kerrville TX
I have gone down and check all the possible surge problems. I ran the codes and got nothing well I got code 11. the car starts fine idles fine but once you drive it around it has what feels like a lean surge at anything less than 2000 rpm. I checked for vaccm leaks and fuel pressure. I got about 16 for vaccum and 40psi vac off for fuel pressure. Changed plugs...the usual.
The car is an 86 gt that I just converted to mass air. Tha motor is ALL sotck 86 gt e6 heads, 55mm throttle body, sd cam. The only thing different is I have a MSD digital 6, and blaster coil on it. I took it off to see if it helped but it did not make any difference. I am only running this engine for now, have a turbo motor form my old car that I paln to put in this one but don't want to do it till I get this cleared up. In case it a computer or wiring problem. Don't want to try and chase this problem while tuning that motor. Any ideas?
 
Did you use any kind of aftermarket or homemade cold air kit for the MAF conversion? If so, try clocking the MAF. Turn it in 15 degree increments until it smooths out or you get back to the starting point.