1991 GMC Sierra "gas leak" Questions

...tank has a leak, or you have a leak in your fuel systems breathing system. HOpefully it is just a Gas Cap thought. That is usually a $5-$10 fix. Good luck. -Jackson

...leak. It assumes fuel vapors are escaping via your gas cap thus circumventing the purpose of the evaporative system. A common fix is to dip your finger in a bit of motor oil and put it onto the gas ...

...vacuum leak will act like a fouled spark plug, or even bad gas... but your sensors will do the same thing.but i would start by looking for a vacuum leak it would be the least expensive starting

99 gmc engine starts idles rough then boggs and dies when you give it gas driving home one day the truck started acting funnny then the power died. replaced the battery now the truck will start but ...

brakes pedal hard when applied If diesel, the vacuum pump is failling or has a leak If gas, the servo is failling or again a leak some where. It should be one of the above. Regards Lloyd

my gas tank leaks when I fill it up on 97 gmc sierra Have you not looked to find where it is leaking,do that I would suspect that the filler tube has rusted You could remove it & solder or silver ...

can;t get any gas ine can;t get any gas in gush of air rushes out when you open the fuel fill sounds like you have a vacum leak. fuel is nasty. you should let an experienced tech take a look at that.

only getting 280 km per tank of gas Get rid of 'er. or fix many potential problems Gas leak, dirty fuel filter or injectors, worn spark plugs, etc.

...idle, runs fine driving, smells rich in exsaust Check for vacuum leaks n (broken or leaking hoses; gaskets), bad EGR valve (plugged or stuck open) or raw gas running into the intake manifold

after sitting, until I use starter fluid You have a fuel issue. Check fuel pump, filter, injectors, gas lines. Your nor getting gas somewhere, It might be leaking from the injectors. Any codes