my 83 stock L28et has a stumble at idle, dose not want to take throttle under load, will not build boost till high rpm, and will only make 4 PSI .
I have verified all injectors are working, all cylinders are firing, I can not find any boost leaks on the stock Jpipe , I have cleaned all electrical connectors and grounds per instruction on http://atlanticz.ca/zclub/techtips/electricalconnections/index.html , and checked all grounds , car is running stock engine management system. The car takes throttle very well at idle but sounds like it had a random miss
any help would be very much appreciated.
The stumble under load can be heard here at 25-30 secs in to vid very clear.
Just a short vid of the issues with the car and showing it taking throttle at idle