88 wagovan code 4 help!!!
 

Hi I have a 88 Honda Civic wagovan that I recently purchased. Having a problem the car will drive fine for about 20 minutes and then die out. Turn the car back on no check engine light a couple seconds later check engine light comes on and is prompting a code 4. I let the car sit 1 hour and turn it back on check engine light is gone and we'll drive time again for 20 minutes and repeat the same issue. When the check engine light is on it won't let me go more than 10 miles an hour and will act like it doesn't want to move or if I hit the gas it will bug out. Its a stick and has a d15b2 in it.