Having problems with your 1991 Cadillac Fleetwood ?

I have a 1991 fleetwood cadillac with a 4.9 v8 engine in it.I replaced the wires,sparkplugs,fuelfilter and airfilter.But my car still runs slugish. I have a 1990 Cadillac fleetwood FWD ( 4.5L ). It displays no check engine light. The gas mileage is is half what it once was and has very poor power at highway speeds. I would appreciate any assistance besides the obvious eg. fuel /air filter, plug/wires.

Posted / edited by AnonymousUser on : 30-03-2020

Answers :

On the first one(the 1991) check the fuel pressure. Actually, check it on both of them.
Repair Help & Product Troubleshooting for 1991 Cadillac Fleetwood

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