I have bin hearing this leak since last week. I figured with the cold weather on the east coast it was just my belt making a little noise. My wife took my truck to work Friday and the check engine light came on when she was driving. She was just doing normal driving , nothing fancy. I told her maybe the guy at the gas station maybe forgot to tighten the cap. I proceded to losen and tighten the cap, the light stayed on but I figured let it sit over night. Getting beck to the hissing sound, I found today it was getting a little annoying and figured I check it out plus my check engine light was still on. I took the cover off the top of the engine and begain to poke around. The hissing sound got a little louder when the cover came off. I checked out some of the hoses but I found nothing. I tried to go around the intake manifold with my fingers but it was way to small. I took a flat head screw driver and just ran it around the outer part of the manifold by the fuel injector. The screw driver hit a spot where the noise was different. I really cant see if there is a hole or if its just a blown gasket I found on that little part of the manifold.

Now here is the kicker. I bought the truck used at a Mazda dealer. I am wondering if I took it to Isuzu they would do a warranty repair. I also have 57000 miles on the beast. Anyone know if I should take it to a local shop or to the dealer?

Thanks for any help that someone could provide <img src="/forums/images/graemlins/confused.gif" alt="" />,

Scott