1991 Buick Century fuel injector Pulse

ZACHARYP

MEMBER
1991 BUICK CENTURY
6 CYL
FWD
AUTOMATIC
140,000 MILES

I have a 1991 buick century custom 3.3 v6, wont start, I have 48 to 50 Psi of fuel pressure, verified spark, checked Tps sensor - tested good, tested Maf sensor - good, replaced knock sensor, replaced crank position sensor, and checked all fuses -fuseable linkes - and relays, all good, ignition module tested good, after all of this I still have no injector pulse, I have tried everything I can think of and am getting noware. Any thoughts

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Turn ignition On-check injector/s connector for power-Do you have it-if so and still won't pulse could be the computer ground drivers-

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Sunday, November 30th, 2008 AT 11:08 PM

HAASER

MEMBER
1 POST

I have a 1989 Buick Century with the 3.3 engine. It had no fuel injection pulse. I checked crank and cam position sensor, IC module, wiring in between ICM and ECM, swapped out ECM, checked ground wires from ECM to engine, F.I. System fuses, everything was OK. The last thing I did was to disconnect all the F.I. Plugs at the rail. All of a sudden there is a pulse! Seems that one of the F.I. Coils was shorted out and pulled down all 6 injectors