1988 Speed Density running rich

[Mpbgt]

I just completed a motor rebuild on my 88 GT convertible. It had an oil pressure issue but otherwise ran smooth. The only mods I made in the rebuild other than stock were stainless headers and an off-road h pipe.
I just started the car and man does it run rich at idle and rough. Could this be because of the new h pipe and lack of back pressure? I put all new 18lbs injectors in it along with new plugs. It still has the stock fuel rail.

Any insights would be helpful

 

[broncojunkie]

Did you pull the plugs? Are all of them covered in soot/carbon? Curious if it's running rich in all cylinders or just certain ones.

 

[Mpbgt]

Did you pull the plugs? Are all of them covered in soot/carbon? Curious if it's running rich in all cylinders or just certain ones.

I have not gotten that far, I just started it later last Night. I’ll be checking that next.

 

[Mpbgt]

I guess as i think about it, any help on what sensors have an impact on air fuel ratio in a speed density car would be helpful. Map, coolant, and what else?

 

[broncojunkie]

I guess as i think about it, any help on what sensors have an impact on air fuel ratio in a speed density car would be helpful. Map, coolant, and what else?

O2

 

[Mpbgt]

It ended up being a very simple problem, my line to my map sensor was broken.

Thanks for all the help