1989 Chevrolet Truck Repair Question
Topics covered: Body, Throttle body, Throttle bore.
Mileage: 245,000 miles.
Mileage: 245,000 miles.
Asked on June 19, 2011
High Idle when cold, revs between shifting
1989 Chev 1500 4.3L V6 Std 2wd, Very High Idle on cold starts, rev's between shifting, calms down when warm, rough idle. Replaced Coolant sensor, TPS, EGR solinoid, IAC, PCV Valve, thermostat, Rotor/cap, plugs,
Asked by sidneybrentAnswer
Replied on June 19, 2011
Clean out the throttle bore/plate and look for vacuum leaks before engine gets to operating temperature-also check fuel pressure-let me know
Replied on June 20, 2011
What is the throttle bore / plate. Is it where the throttle body meets with the intake manifold?
Replied on June 20, 2011
Is this a TBI or CPI fuel injection? -On a CPI Is where the air intake tube from the aircleaner meets the throttle body-behind it you will see a butterfly. On a TBI its right under the air-cleaner
Replied on June 20, 2011
This is a TBI the air cleaner is on top. I cleaned out using carb cleaner spray and inline fuel injector additive.
Replied on June 20, 2011
Recheck the IACV, TPS and look for vacuum leaks-also rev's between shifts could mean the clutch slipping