replaced fuel injectors and rough idle and sputter on acceleration.

[Some guy]

Hi so in April i replaced 2 leaking injectors with the Volvo new ones. after i did this the car ran badly. So after i inspected the 2 new injectors, i saw that one had a bad spray pattern. so i finally got around to replacing that one. So now i have a rough idle and bad acceleration when under 3000 rpms. it runs fine above 3000. the fuel ratio had been worked on in march for a smog test. but i messed with the injectors and a bunch of other parts because of a bad check valve in a brand new fuel pump.(wasted so much money because of this)
Any way, i figure the car must be running lean because before the car was dumping fuel because of these bad injectors and now it is holding back fuel, because they are new.

it seams like i should bump up the idle mixture from what i can read, but other then that is there anything else that it could be? i know i should dwell it, but i am going to take it to a shop near me once i can make sure that is my "only" issue left

vacuum hoses look ok and i tested the vacuum advance a while ago and that was working fine. My neighbor said that he smelled a lot of exhaust in the garage when it was idling for a short time.

is the dwell mixture just for idle and acceleration? and the lambo system for normal running?

[David T]

Hi so in April i replaced 2 leaking injectors with the Volvo new ones. after i did this the car ran badly. So after i inspected the 2 new injectors, i saw that one had a bad spray pattern. so i finally got around to replacing that one. So now i have a rough idle and bad acceleration when under 3000 rpms. it runs fine above 3000. the fuel ratio had been worked on in march for a smog test. but i messed with the injectors and a bunch of other parts because of a bad check valve in a brand new fuel pump.(wasted so much money because of this)
Any way, i figure the car must be running lean because before the car was dumping fuel because of these bad injectors and now it is holding back fuel, because they are new.

it seams like i should bump up the idle mixture from what i can read, but other then that is there anything else that it could be? i know i should dwell it, but i am going to take it to a shop near me once i can make sure that is my "only" issue left

vacuum hoses look ok and i tested the vacuum advance a while ago and that was working fine. My neighbor said that he smelled a lot of exhaust in the garage when it was idling for a short time.

is the dwell mixture just for idle and acceleration? and the lambo system for normal running?

My advice would be to pull all of the injectors and have them cleaned and tested before trying to adjust anything. The idle is non-adjustable. The mixture setting is for general running and the Lambda system is for closed loop once the motor warms up. You also need to be sure you have no vacuum leaks. The best way to do that is with a smoke machine. The general advice is that you cannot "fix" anything by turning adjusting screws. Figure that they were properly set and now it is not running right. Something changed and it was NOT an adjustment. Usually dirty injectors and/or vacuum leaks.