Hey guys new problem I replaced my injectors to some better ones I got from the junkyard and now it's running super rich my last injectors caused my car to run really rough and caused the car to shake while driving ad it had diff kind of injectors on at the same time that's why I replaced them and now it spits out black smoke but while driving it has a lot of torque . Plz help

 

What kind of injectors? Did you change Your fuel rail and the FPR?

Have you done any other troubleshooting like the MAP sensor vacuum hose?

 

My money's on a busted MaP to throttle body vacuum hose.

 

What are other symptoms of a busted map sensor hose what should a good one look like and I only replaced the injectors nothing else

 

What is the fpr

 

Blowing black smoke...........

Go poke your noggin under the hood and look at it. Runs from the throttle body to the MAP sensor on the firewall. You can't remove and replace the injectors without disturbing it.

 

Fuel pressure regulator.

 

I know what that hose is when u unplug it the car shuts off right ??? Do I need a new one if I replaced my injectors

 

How can I tell if my fpr is bad ???

 

Check to make sure you didn't break or crack the hose from the TB to the map, it is very easy to do. You shouldn't need a new one because of the new injectors.
And wish I knew how to test the FPR, but I don't sorry.

 

MAP sensor testing on this page: http://www.lunghd.com/Tech_Articles/...iagnostics.htm

The unit must have GOOD vacuum and all fittings need to be clean and not cracked. You need to check the MAP.

Fuel Pressure Regulator must be upgraded to accomodate the Bosch *703 injectors. Since you haven't mentioned what injectors you used then we can't really help any further than that.


A busted fuel pressure regulator will be visibly wet if you remove the vacuum line from it. This indicates that the membrane has ruptured.

 

What changed? The injectors. Get some crappy ones?

 

Diesel!

 

Thanks guys it was the map vacuum hose it was cracked

 

No kidding? Whooda ever thunk it?

Like in post #2 and #3?