1989 Buick Century After 100's spent engine still won't sta

DRAGONRIDER6218

MEMBER
1989 BUICK CENTURY
6 CYL
2WD
AUTOMATIC
125,000 MILES

My car recently had something go wrong with it. Thus far I have replaced 3 injectors, fuel pump, spark plugs and wires, ignition control module, and ignition coils. The car still won't start and when I shut it off I can hear the injectors spitting fuel into the engine. I have tried to run a diagnostics test and all I am getting is a 12 (all clear). Could this be happening because the PCM is bad? The balancer also turns a full 360 degrees with resistance but it does not stop. I have no idea what could be going on here and have only the PCM to replace before I give up and junk the thing and cut my loses. I just don't want to replace the PCM if this is not the problem. HELP!

2 Replies

F4I_GUY

MECHANIC
3,302 POSTS

Have you check for fuel and spark? I know you can hear the fuel, but did you check fuel pressure? Is the spark that you are recieving, strong?

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Thursday, March 26th, 2009 AT 6:11 PM

DRAGONRIDER6218

MEMBER
1 POST

I have not checked my fuel pressure yet, or compression. But I did check my spark plugs and when testing them out of the cylinder and close to metal I am getting no spark. I don't know if it means anything but I checked the wires and plugs with an ohm meter and both were reading a value and not infinity. I also unplugged the injectors and they still sounded the same. This leads me to believe that I am getting no pulse signal to the injectors. When weather permits again I am going to start the painstaking task of tracing all my wiring to make sure everything is still grounded. I still can't help but think this is my PCM being shot. The info I have found states that the PCM in those days was very succeptable to failure. It had been replaced with a refurb before I bought it but that does not mean it did not go bad again down a different circuit path then what had previously been refurbed.