need help 1990 ram 350

hi i bought a ram 350 van, trans was out, well gone. i put another trans in and works fine,i am haveing trouble with the motor. idles fine but back fires threw throttle body when gas is pushed,not all the time mostly during take off. sometimes stalls out.it doesnt mater how much gas is pushed. put new cap wires and pick-up in it.cap help some.tried to adjust timeing with no luck, i back the timing up and it stalls out. wont restart untill i reset my distubitor.the problem cleared up[ i thought i fixed it] but it sit for 2 weeks and problem came back. now its here to stay. also has a very high idle at start. was going to work on that untill motor problem came back.check engine light is out.was thinking possable computer problem?

also has a very high idle at start.

Sounds like a possible vacuum leak. Have you checked for any loose, broken, or cracked hoses, especially the PCV one?

i have looked but will check again thanks. will post again this afternoon

hi im back, looked at vac lines didn't see any problems but has one comeing off pvc line to the under side of the van. i removed it, back fire stopped thank goodness! but still wont go. engine dies when accelerater is pushed. idle is irratic now. repaired the check engine lite getting code 36. adjusted timing till engine will build rpms , i get engine kick back at start, have to readjust timing to start engine.stalls at idle now too. can get high rpms when not in gear sometimes. is there any hope?

Code 36? These vans don't have a code 36, are you sure you're reading the code correctly?

How is your fuel pressure, have you tested it?

You said you put in a new cap/rotor/wires; did you put in new plugs? Old plugs can cause some of the issues you mentioned. How about the air filter?

hello, have an update: replaces fuel filter running great. plenty of power and acceleration. but have been here b4 time will tell if the problem is fixed. as for the codes i checked 3 times it say 36. i know this model dont have code 36. so not sure whats up with that. but as long as its running good im not worried about it.going to see how it runs tomarrow and then start on little projects ex: dimmer switch,radio,cosmetic. i hope this works been messing with it for 2 months,have 4 kids and hard to get around in my nissan king cab. thanks for your help. guess i just over looked the basics. thanks again