Truck has problems after it rains.

1993 CHEVROLET TRUCK

29,400 MILES

WHITECHEVYTRUCK

MEMBER
2 POSTS
FOLLOW

I have a 1993 Chevy Silverado Diesel dually truck. The morning after a big rain storm is when the trouble starts. My check engine light will be on when that is not normal. As I’m leaving my house going down the road doing around 35 to 40 everything is fine, it is when I hit the highway and want to do 50 and over I have problems. I can feel my engine go skip, skip, skip and while it does not slow the truck down I can certainly feel it. Yesterday was marginally worse and I was nervous to even try to go over 45 mph.
After my truck has sat at work all day in the sunshine it runs fine. Obviously something is getting wet, but what? This does not happen when I wash my truck, only after it rains. My mechanic does not know the reason. Do you?
Thank you for your help.

Apr 23, 2013 at 12:32 PM

ASEMASTER6371

CAR REPAIR CONTRIBUTOR
52,796 POSTS

lets start off with the code for the check engine light

Roy

Apr 23, 2013 at 4:22 PM

WHITECHEVYTRUCK

MEMBER
2 POSTS

Hello Roy,

My truck does not have a computer so as far as I know there is no code. At least that is what my mechanic tells me. And by the way, the mileage should read 294,000 miles, not 29,400. My goof. I also wanted to add that by the afternoon on my ride home, the check engine light is off and has not come on again since the morning of the rain. The truck has been fine every since.

Thank you for your help. I really appreciate it.

Apr 24, 2013 at 6:39 AM

ASEMASTER6371

CAR REPAIR CONTRIBUTOR
52,796 POSTS

first, your car does have a computer and it is talking to you.

next, get a new shop familiar with computers and diags.

we need the code

Roy

Apr 24, 2013 at 4:32 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.