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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1985S10/T10 BLAZER 4WD L4-151 2.5LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSADJUSTMENTSIDLE SPEED ADJUSTMENTS
1985 Chevrolet S10/T10 Blazer 4WD L4-151 2.5L
Idle Speed Adjustments
1985 Chevrolet S10/T10 Blazer 4WD L4-151 2.5LSECTION Idle Speed Adjustments
1985-86 2.5L (151) FI: Remove air cleaner assembly and disconnect Idle Air Control (IAC) multi-plug. Start engine and allow idle to stabilize. Install special tool in the idle air passage of the throttle body and turn throttle stop screw to obtain the specified setting speed.
1987-90 All: Ground diagnostic terminal (see COMPUTER DIAGNOSTIC CODES), turn ignition on but do not start engine. Wait 30 seconds then disconnect the IAC connector. Remove ground from the diagnostic terminal, start engine and turn throttle stop screw to obtain the specified setting speed.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.