I have a 2000 chevy van 1500 5.7L whe the van

What makes you think the timing is the problem?

the high humidity (water) is attacking your electrical starting system, whens the last time you changed your spark plug wires , distributor cap & rotor ? how about your fuel & air filters ? cleaned your battery terminals ? try it , it will help !!!!!!!!!

needs the water system back flushing out, heater being cold is its blocked up some time a few back flushes and forward flushes with a hose pipe should free up the dirt inside, same with the engine and radiator. there are meany videos on you tube to help you understand how to back flush you engie. but do the radiator and engine and heater separate so the muck does not go back into the engine.

Usually a blend door problem, either the control or the blend door itself.

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60psi cold / 30-45psi warm is ideal. I've seen (with that mileage) 45 cold/ 20 warm and that's acceptable - anything less start thinking about a new oil pump.

Check for the ground to the engine and to the body, chevys comes with a lot of grounds everywhere but the most for starting are the one on the engine and the one on the body, check for the correct gauge of the cables, fell the cables if they are warm whe you try to start, it supose to be a gauge bigger.
goodf luck.

HOW TO INSTOL FUEL PUMPE N14

2000 chevy venture run good but my lights flickers and have to jump. After I jump the van and put my meeter on the battery its reading 14.volts at idle. I can drive around to store cut the van off come out it starts fine leave it overnite and it don't started.

i have a 2000 Chevy van where is the fuse for the two(2) rear power outlets