QuestionI have a 2001 Sonoma with the vortec 6. The motor seems fine but the other day while driving on the highway i lost all top end power speed went doen to 45 and felt like it was slipping if <i tried to go faster. It was is fine around town
Answer1 Inspect Fuel Filter Clogged or dirty fuel filter
2 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system.
3 Inspect Air Filter Restricted or clogged air filter.
4 Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s).
5 Inspect Spark Plug Fouled, damaged or broken spark plug(s).
6 Inspect PCV Valve Plugged or damaged pcv valve.
7 Inspect Carburetor Float Improperly adjusted/saturated or damaged carburetor float.
9 Inspect Needle Seat Dirty or worn carburetor needle and seat.
10 Inspect Timing Cover Stud Kit - Performance Improperly adjusted or worn/malfunctioning power valve
11 Inspect Choke Pulloff Worn, defective, or faulty choke pulloff(s).
12 Inspect Choke Thermostat Stuck or improperly functioning choke thermostat.
13 Inspect EGR Valve Clogged, dirty or improperly functioning or defective egr valve.
15 Inspect MAP Sensor Improperly connected or faulty m.a.p. sensor.
16 Inspect Mass Air Flow Sensor Improperly connected or faulty mass air flow sensor.
17 Inspect Air Cleaner Temperature Sensor Damaged or faulty air cleaner temperature sensor or air cleaner temperature sensor circuit.
18 Inspect Spark Plug Wire Loom - Performance Improperly adjusted or worn/malfunctioning carburetor.
19 Inspect Oxygen Sensor Damaged or faulty oxygen sensor or circuit.
20 Inspect Fuel Pump Improperly functioning fuel pump or circuits.
21 Inspect Hood Brace Leaking, worn, or damaged intake manifold gasket
22 Inspect Transmission Filter (A/T) Clogged or dirty transmission filter.
23 Inspect Throttle Position Sensor Faulty throttle position sensor or throttle position sensor circuit.
24 Inspect Transmission Modulator - (A/T) Worn leaking or faulty transmission modulator valve or vacuum system.
25 Inspect Fuel Injector Plugged, dirty or poorly connected fuel injector.
hope this helps
Bruce
