1990 Suzuki Swift GTFACTORY OEM SERVICE PROCEDURE

Timing Control Systems (Sidekick, Swift SOHC)

  1. Connect timing light to vehicle. Start engine. Disconnect vacuum hose from vacuum advance unit. Increase engine speed while monitoring timing marks with timing light. Timing should advance. If timing does not advance, inspect distributor advance weight mechanism for binding.
  2. Connect a hand-held vacuum pump to vacuum advance diaphragm. Slowly apply vacuum to diaphragm while monitoring timing with timing light. Timing should advance as vacuum is applied. If timing does not advance, check for diaphragm-to-distributor plate linkage binding. If linkage moves freely, replace diaphragm.
  3. On Swift (SOHC), apply vacuum to retard diaphragm (diaphragm closest to distributor). Timing should retard as vacuum is applied. If timing does not retard, check for diaphragm-to-distributor plate linkage binding. If linkage moves freely, replace diaphragm.
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.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.