97 tahoe

[marudkny]

I have 1997 5.7 tahoe LT 4x4 4door 150k
the problem is it doesn't start when weather is humid.
but sunny & dry days it start perfectly and everything is nomal.
i just did light tune up 1month ago.
what is the problem?
Guys how do i fix this problem.:confused2:

 

[redhat-z]

It could be moisture getting in the distributor cap. Just a thought.

 

[Mike97]

Move to sunny southern california?:gy:

It's difficult to suggest anything when all the information you give is that it won't start.
What are the symptoms when it won't start?
Does the engine crank over normally?
Does it crank more slowly when it won't start?
Does it sound like it wants to start but doesn't quite fire?
Does it sound different when it doesn't start?
Do you notice any different smells on those days?
Did it have this problem before you did the tune-up?
Did you replace the cap and rotor when you tuned it up?

redhat could be right about the dizzy cap having moisture in it. But that usually only happens if yo get water sprayed directly on the distributor. And will affect it even in good weather.

 

[marudkny]

the symptoms are~~~

when it won't start crank more slowly and sound like it wants to start but doesn't quite fire.
I think i have this problem after i tune-up. (after 1month)
and i replaced cap, rotor, sparkplugs, wires, airfilter(K&N)
and there is holes at muffler. I'm gonna replace anyway.

 

[Rick90467]

Move to sunny southern california?:gy:

OMG, let's not get crazy here. For the cost of living down there the poor guy could buy a whole new truck and still be better of financially.

I'll take my crystal ball out here and guess that the battery terminals were not snugged good after the tune up and the charge has finally dwindled.

 

[Mike97]

Could be the starter is getting weak, or loose battery cables like Rick90467 stated, or the battery could be getting weak. Or the alternator could be going out. How much slower does it crank over when it's acting up? If the engine doesn't crank over fast enough it won't start. Check on those things and check back with what you found.

 

[marudkny]

i trying to start 5-6 times it getting slower.
and it sound like trying to start, but gose off right away.
also starter sound like fine, when dry days it starts right away...
and battery is 2 month old, i replaced optima red top battery
i check volts meter when it start, usually 14volts to 15 volts
that means alternator is fine right?
dose the starter affect humid weather?
u think starter make this problem? do i have to change?

 

[Rick90467]

i trying to start 5-6 times it getting slower.
and it sound like trying to start, but gose off right away.
also starter sound like fine, when dry days it starts right away...
and battery is 2 month old, i replaced optima red top battery
i check volts meter when it start, usually 14volts to 15 volts
that means alternator is fine right?
dose the starter affect humid weather?
u think starter make this problem? do i have to change?

me dont know.. how many peso yu pay for dis truck?

 

[Mike97]

i trying to start 5-6 times it getting slower.
and it sound like trying to start, but gose off right away.
also starter sound like fine, when dry days it starts right away...
and battery is 2 month old, i replaced optima red top battery
i check volts meter when it start, usually 14volts to 15 volts
that means alternator is fine right?
dose the starter affect humid weather?
u think starter make this problem? do i have to change?

The next time you can get it started, drive it to an auto parts store. Most of them can connect a diagnostic tool up to the vehicle and test the components with them on the truck. Just make sure that you keep the engine running when you go into the store. You might want to call them ahead of time and see if they offer this service. Most of them do not charge for this since they figure that if something is bad you will purchase the replacement part from them.