I KEEP GETTING A CHECK ENGINE LIGHT COMING ON

2000 Dodge Dakota

Tiny

flattop1

May, 8, 2012 AT 9:29 PM

Always says check to see if gas cap is on tight or there maybe a vacuum leak. This is the 3rd time in the last 18 months and I have replaced cap twice. My mechanic cannot determine where the vacuum leak is and also do you check for one. I'm trying to keep from taking it the dealer ship. Also vehicle runs fine.

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4 Answers

Tiny

promechanic

May, 8, 2012 AT 9:35 PM

You need to find a mechanic that has a "smoke machine" this is a machine that can introduce smoke into the system which will then leak out wherever the leak is.
You might also have a purge solenoid that has gone bad. This is sometimes that cause of your problem.

Tiny

cadieman

May, 8, 2012 AT 10:06 PM

Ck the dealer for bullitins to

Tiny

tedwright

August, 5, 2012 AT 5:24 AM

Look under the truck at the Charchol Canister it has a few vaccume lines coming and going and that is sensitive if any are dry rotted it will cause a leak in the fuel pressure system and throw a MIL light

Tiny

Norcal

August, 12, 2012 AT 8:34 PM

I had the same thing in my 99 sport. I checked the char can and noticed I had a crack on the housing for my gas tank that wasn't very big but after throwing some epoxy on it. FIXED. Moral of story. Look around the canister and gas tank housing for any cracks. Mine was only about an inch big.

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