Northstar Engines and System Technical Discussion Discussion, 93 Seville Running Rich in Cadillac Engine Technical Discussion; Help!, I have a 93 Seville that's running very rich. so much so it's making the Cat glow red hot. ...
Help!, I have a 93 Seville that's running very rich. so much so it's making the Cat glow red hot. I had a new Cat installed. I replaced a leaky injector but it still running rich. I tried clearing the old codes by disconnecting the battery removing fuses but all the codes show history. dont know if not being able to clear codes & running rich is related. any ideas are appreciated.
Automobile(s): White Diamond '03 DHS (with DTS floor shift)
Re: 93 Seville Running Rich
With the engine running, pull the vacuum line off of the fuel pump. Look for fuel leaking from the nipple. There should be none. If OK, with the engine off, lift the fuel rail with the injectors attached. Have someone turn the ignition on, but DO NOT crank. That will energize the fuel pump and pressurize the fuel system. Now look for a leaky injector.