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.
1990 Isuzu Impulse AutomaticFACTORY OEM SERVICE PROCEDURE
Torque Specifications
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | ||
|---|---|---|---|
| PFI | |||
| Amigo, Pickup & Trooper (2.6L) | |||
| Fuel Rail Bolt | 10-17 (14-23) | ||
| Distributor-To-Cylinder Head Bolt | 14 (19) | ||
| Intake Chamber-to-Intake Manifold Bolt | 15-25 (20-34) | ||
| Thermostat Housing Bolt | 10-17 (14-23) | ||
| Throttle Body Bolt | 10-17 (14-23) | ||
| Impulse | |||
| Fuel Rail Bolt | Information is not available from manufacturer | ||
| Intake Chamber-to-Intake Manifold Bolt | 30 (41) | ||
| Thermostat Housing Bolt | 14 (19) | ||
| Throttle Body Bolt | 14 (19) | ||
| TBI | |||
| Fuel Inlet Fitting | 30 (40) | ||
| Fuel Line Nuts | 20 (27) | ||
| Fuel Outlet Fitting | 22 (30) | ||
| Idle Air Control Valve | 13 (18) | ||
| Throttle Body-to-Intake Manifold Bolt | 18 (25) | ||
| INCH Lbs. (N.m) | |||
| Lower Throttle Body-to-Upper Throttle Body Screws | 35 (4) | ||
| Throttle Body Cover Screw | 27 (3) | ||
| Throttle Position Sensor Screw | 18 (2) | ||
Factory Service Tools
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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.
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