92 issue

[Dave92]

So I recently upgraded to 22lb injectors in my 1992 302 HO. I put a mass air rated to 24 lb calibrated. Bbk fuel rails. I started it up and I’m get a lot of hesitation from the engine. Shakes bad and blue smoke when I rev it up. I’m doing a regulator tomorrow and a gauge. Any ideas what my problem could be?

 

[General karthief]

Miss matched parts on an unmodified computer controlled car is asking for trouble, the computer works around a certain set of perimeters and info from sensors, basically it is getting conflicting info and can't control the 22lb injectors with a maf calibrated for 24s.
Why are you doing this?

 

[Potomus Pete]

Did you save the 19's You may want to put them back on

 

[Dave92]

Should I up them to 24lb? I wanted to update the fuel system on the car. Give a nicer look also with the new rails. I tossed the old ones as some of them weren’t in the best shape.

 

[Potomus Pete]

You at least have to have an exact match on injectors/MAF. Did you get injectors on E Bay. The reviews on those are terrible. You may have to go get some origionals if all else fails. Post a picture of the car so we can see what you got.

 

[General karthief]

There are injectors the ecu is not setup to deal with like high vrs low impedance types of injectors, remember with EFI bigger is not better.

 

[Mustang5L5]

What 22# injectors do you have? If you measure resistance across the coil on the injector, do you get 14.4 ohms?