1997 Gmc Yukon

[macloon]

I have a 1997 Yukon 125,000 miles gas engine that has been a great car but lately it has a mind of it's own. Whenever it rains or is real damp the truck will not turnover or starts really hard. The dealership says it's a fuel injection problem but although I'm not a car guy it doesn't make sense to me since it does not occur all the time. Is there a sensor that tells the fuel pump to shut down when it rains or could there be wires crossed? Recently had it tuned at the dealership. Currently it's in the garage with a fan blowing on it! Please help before my wife kills me!!!

[bill190]

More details please...

 

Does the ignition light come on?

 

Does the starter motor crank the engine?

 

If yes, see if you are getting spark. (Spark problem)

 

Try squirting a bit of starter fluid in the throttle body while starting. (Fuel problem)

 

Try pressing slightly on the accelerator. (Idle air problem)

[macloon]

More details please...

 

Does the ignition light come on?

 

Does the starter motor crank the engine?

 

If yes, see if you are getting spark. (Spark problem)

 

Try squirting a bit of starter fluid in the throttle body while starting. (Fuel problem)

 

Try pressing slightly on the accelerator. (Idle air problem)

Ignition light comes on and the starter motor cranks the engine. I'll give the starter fluid a try, Thanks

[bill190]

Here is a spark plug wire test...

http://www.trustmymechanic.com/auto-repair...plug-wires.html