View Full Version : 1990 Century Fuel problems

05-11-2005, 11:45 AM
Hello, I have a 1990 Buick Century 3.3.
The fuel pump went out and I changed it and now it's pumping and I get fuel to the injectors but they are not injecting.
Everything ran fine until the pump went out
Any idea's or suggestions ? Thank You

3.3 Man
05-11-2005, 06:09 PM
You might have bad injectors. They could be clogged or what not and might not function to their full capacity being that they're over 15 years old. You could first try flushing them out before having to replace them.

05-12-2005, 08:03 AM
there is a fuse and a relay in the injector circuit. you might want to look there.

tech jake
05-12-2005, 09:04 PM
My guess is you have a bad crank shaft position sensor or ignition module. Probably the crank sensor. You have to check the fuel pressure and the noid at one of the injectors. If the pressure is good I'm guessing you have no noid at the injector. Which would be the crank sensor or ignition module. The noid light checks for power at the injector, a test light won't pick up the signal very well.

05-14-2005, 02:22 PM
did you replace the filter and strainer? make sure you have the right amount of pressure and injector pulse as stated above.

05-16-2005, 11:34 PM
I have good fuel pressure. 43 with the key on and 46 when cranking.
It will start when I spray gas or carb cleaner in the breather and it will run smooth as long as I am spraying. As soon as I stop it dies.
I have checked everything except the ignition module and crank sensor.
I don't know where to look for either or how to check them when I do find them.
Thanks for the replies. This is the first fuel injection I have ever tried to work on and I would not have known where to start without your suggestions. Thanks again...Dave

05-18-2005, 11:31 PM
need to check injector pulse and spark.