Car cranks but wont start. Gas Cap?

use some starting fluid, spray a little bit in the carburetor then try to start it, it should start,if not check for spark at the spark plug and there is a little valve on the fuel rail it has a black cap on it looks just like a cap on the tires take the cap off and push the pin in and see if gas comes out if you have spark and gas it should start

This is something that you cannot afford to throw any more money at. Get a timing light to check to see if there is spark. Use a pressure guage to check fuel pump. Get bug lights to test injectors.

loose gas cap is just that. it means the gas tank venting system
is breached, cap is 99% cause, but not all. and will not cause no starts. unless you put a non jeep gas cap on car, with no spec, vacuum breaker in the cap and the vent goes to vacuum , killing the pump output, to low. and no starts . (use real caps)
so if that is try , take the cap off, and key on 3 times for 5sec
(this primes the system) then crank, start now>?


no start
but will it crank
if and if it cranks robustly does it run for 1 or 2 seconds and stop>
do you have spark ? at all cylinders. engine option not stated, so...??????????

if it cranks and dont start here is the ASD rule page
http://www.fixkick.com/Jeeps/ASD.html

the story of the chicken and egg.
what comes first?

Most likely your tank breather is blocked

There are a few things that can go wrong here. One is a bad gas cap. Dealer charges $45, and AutozoneAz charges $10. Your call there. But first, clean around where the gas cap meets the filler adapter to see if dirt has built up. If so, the gas cap is not making a good seal. On a hot day, you should hear the gas escape from the tank when opening the cap (well, on a gas car, maybe not a diesel). There is also a valve that is near the air intake box that may need replacing. It is a very easy replacement and does not require a mechanic to do. It is different from car to car, but on my Passat it's called an N80 valve. It opens a line to the evap canister to get that fuel to burn.

Worst case would be the canister as it is about $200. So do the cleaning first, then the gas cap, then the N80 (or whatever it's called on a Jetta TDI).

98 chev pickup s10 put gas in the gas tank drove it about 2days and the check engen light came on had it check mech said it was the gas cap replace the gas cap the light back on now what help

when you pump the gas, you shut off the fuel injectors. could have one leaking causing it to flood and not start

Check this 1998 Dodge Dakota 2WD 3.9 liter V-6 VIN "X"



Good luck.

sir try to check ground connections

Are you sure it is getting spark to the plugs? Did you check fuel pressure? It still may be getting some fuel but not enough. Is it fuel injected or car berated?