Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1988 Cadillac Seville BaseFACTORY OEM SERVICE PROCEDURE
Visual Inspection
NOTE:
All DFI diagnosis should begin with a thorough visual inspection. Visual inspection can often lead to the repair of a simple problem without the use of diagnostic charts.
Visual inspection should include:
- Checking vacuum hoses for damaged and proper routing.
- Checking for proper ground connections (ground eyelets connected to ground points). Ensure star washers are installed (if equipped). The engine/DFI fuel system grounds are located as follows: ECM and ALDL connector ground is located on body ground stud, near battery. Fuel pump ground is located in front of engine, near starter. The oxygen sensor reference circuit is grounded on engine, at rear bank of cylinders, with a ground eyelet on power steering line retainer clip.
- Checking for blown or missing fuses or relays, or installed in wrong locations.
- Checking air cleaner for proper installation. Heat tube and vacuum tap must be connected. PVC hose from rocker arm cover must be installed.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.