I have a 93 mercury cougar, 3.8. When I first start it up and give it gas it'll sputter then stall and the check engine light will come on and it won't start again unless I give it gas and even after it starts it will stall out again when I put it in gear in give it gas. It's had this problem for awhile and sometimes it'll drive just fine. The problem seems to be happening more frequently. I also have no gas cap (I know, stupid) But could this be my problem?

SOURCE: When I put car in gear it sputters and stalls.

read the codes with volvo or if you would like me to guess replace the air mass meter/ck all vac hoses

SOURCE: 94 Jeep Wrangler intermittently stalls when put in reverse, drive

Take the air inlet hose off where it enters the throttle body and take a look at the throttle plates. It is likely that they’re dirty and have a build-up of carbon deposits. That is the most common cause for stalling that we see in the shop for your vehicle. Sometimes all it takes is a good cleaning to cure the stalling problem. There is an idle speed setting on your Jeep, but to check and/or perform this service step requires the use of a computer scan tool for your vehicle. If the cleaning doesn’t help ask a repair facility to check and reset, if needed, the minimum idle speed on your Jeep.


Thnx.

SOURCE: 93 accord stalled while driving....

pull one of the plugs out leave the plug wire on it and rest it on something metal on the car and have someone try to turn it over.if no spark can be seen try changing your crankshaft sensor

SOURCE: Car stalls when accelerating

I would replace that tank (asap), so there can be a cap back on it.
With the cap off, the fuel system can't build up any pressure to hold the gas in the lines.

SOURCE: 93 lumina stalls at any speed will start again always

Might want to chg. the fuel filter, (if you havent already), also do a fuel pressure chk. filter could be pluged up and in turn weaken fuel pump.