QuestionI have a 99 Chevy Silverado 4x4 extended cab 5.3 litre. My problem is while the engine is cold it will start right up. usually in the morning or if its been sitting for about 8 hours it will fire right away. If by chance I have to start it after an hours time I have to try cranking it over about 3 times before it running. I've replaced the plugs, Fuel pump, Filter and I've thrown enough injector cleaner in it as well. I've read that it could be a EGR Valve or a Fuel Pressure Regulator. The engine will feel like it is missing or not fire in all cylinders if I'm idling at a light. It's actually stalled at a light in the past but its been rare. I do have a check engine light on. I'm at the point where I dont know whats left to do. I was told by a Goodyear Mechanic to turn the key to the ON position 3 times and try to see if it will start. That failed as well. Its still started but it took 3 tries before it fired up.
AnswerOk this is gonna be fun there are several things that could be you problem. I know you have tried a few of these already but this is the list:
1 Inspect Battery Damaged or faulty battery and/or connections.
2 Inspect Coil - Ignition Damaged or faulty ignition coil or ignition coil circuit.
3 Inspect Fuel Filter Clogged or dirty fuel filter
4 Inspect Fuel Injector Pressure Regulator Faulty fuel injector pressure regulator or circuit.
5 Inspect Fuel Pump Improperly functioning fuel pump or circuits.
6 Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s).
7 Inspect Control Module-Ignition Faulty ignition control module or circuit.
8 Inspect Solenoid Switch Damaged or faulty solenoid switch or solenoid switch circuit.
9 Inspect Starter Damaged, worn, defective, or faulty starter or starter related circuit.
10 Inspect Neutral Safety Switch Damaged or faulty neutral safety swittch or circuit.
11 Inspect Fuse Corroded, burned, or shorted fuse may be interupting power source.
12 Inspect Fusible Link Corroded, burned, or shorted fusible link may be interupting power source.
13 Inspect Battery Cable Corroded, broken or poorly connected battery cable.
14 Inspect Spark Plug Wire Loom - Performance Improperly adjusted or worn/malfunctioning carburetor.
15 Inspect Distributor Cap Loose or cracked distributor cap
16 Inspect Distributor Cap And Rotor Kit Loose, cracked, or worn distributor cap and ignition rotor.
17 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system.
18 Inspect Fuel Injector Plugged, dirty or poorly connected fuel injector.
19 Inspect Ignition Switch Worn, damaged or faulty ignition switch or circuit.
20 Inspect Spark Plug Fouled, damaged or broken spark plug(s).
21 Inspect Belt Incorrectly routed, adjusted(tensioned), missing or worn drive belt(s).
22 Inspect Timing Belt Slipped or broken timing belt.
23 Inspect Timing Set Slipped timing chain or worn timing gear(s).
24 Inspect Fuel Tank Contaminated fuel from rusted or deteriorated fuel tank.
25 Inspect Timing Specification Incorrectly adjusted engine timing.
Good Luck
Bruce
