Wet Plugs

[Lnarranger]

I have a rebuilt '87 mustang 5.0. The plugs will be black and wet within 1 minute, then the engine runs ruff and black smoke. Idle bypass, egr, and coil are all new. ????

 

[90sickfox]

Sounds like its running pig rich. What color are the injectors ?

 

[Mustang5L5]

Two things.

Specs on what is done to the engine

Have you run the engine codes? If not, can you do this and report back what you get?

 

[Lnarranger]

Sounds like its running pig rich. What color are the injectors ?

Sounds like its running pig rich. What color are the injectors ?

orange

 

[Lnarranger]

I have a rebuilt '87 mustang 5.0. The plugs will be black and wet within 1 minute, then the engine runs ruff and black smoke. Idle bypass, egr, and coil are all new. ????

Engine rebuilt to factory specs for 87 mustang 5.0. Getting code 98 and 54

 

[Lnarranger]

Two things.

Specs on what is done to the engine

Have you run the engine codes? If not, can you do this and report back what you get?

Engine codes are 98 and 54. The injectors are Accel 150819. Engine was rebuilt to factory specs for 87 mustang 5.0

 

[90sickfox]

Is the timing set correctly ? Jrichker may be able to chime in with a timing check list....or look it up on your own.

The orange tops are the correct ones. Has the car been converted to 5 speed...or computer swapped ? Just asking because the O2 sensor harnesses are different.

 

[Mustang5L5]

Code 54 is ACT circuit open.

Code 98 is a hard fault.

 

[Lnarranger]

Is the timing set correctly ? Jrichker may be able to chime in with a timing check list....or look it up on your own.

The orange tops are the correct ones. Has the car been converted to 5 speed...or computer swapped ? Just asking because the O2 sensor harnesses are different.

The engine and ECU are from an 87 mustang. They are now in a '77 Bronco with a c-4 automatic. I am about to run a vacuum and compression test. What would be the process to check the ECU? With all of the sensors being new could it be weak or giving false commands?

 

[General karthief]

Do you have the plug to run the codes?
If you swapped the bronco computer for the 87 it may be pinned different, were they the same numbers? Speed density? Mas air?

 

[Mustang5L5]

What engine harness are you using?

 

[Lnarranger]

Every sensor on the engine was replaced with new. Installed an external ground wire on the ECM. Went back to basics, brought #1 piston up, marked where the rotor was pointing, picked the distributor up and placed the cap #1 spot right in front of it. Runs like a new one. I appreciate all of you who tried to help. Thank you.