ok i have done all the searching, also posted in the carb forum but there is not muh response in there so please help me here i have a 1983 2.8 with a 2bbl carb it sems to back fire through the carb when i try to get on it also when i shut the car of it trys to continue to run and i am getting horrible gas mileage. I dont know how to tune my carb or even what kind it is i know its a rebuilt oem anly about a thousand miles old so please help me im putting gas in my car every day and im not going any where.... thanks in advance

 

best advice would be to trash it and throw an aftermarket holley four barrel on it imo. Then again you'll get the answers as to how to tune it by somewhere here soon i hope for your sake!

 

sounds like a timing problem more than a carb problem

 

If the car is dieseling,running after you shut her off,then firebird45331 is right it sounds like you could have a timing problem.I would check that first.Also when was the last time you replaced your cap/rotor,wiresand plugs(really a full tuneup with new filters probably wouldn't hurt if it's been awhile).A bad plug wire can cause backfiring by allowing a cylinder to load up on fuel without burning it then it misfires.You can damage the cat and muffler with backfiring(I've learned this the hard way more than once)Your carb could still be out of adjustment - especially if idle is set to high or the idle solenoid is out of adjustment.Also check all your vacuum hoses.

 

ok to give you the run down the car just had a new engine put in a 9 months ago of course with new cap rotors plugs wires filters everything new!! One day i was driving and a wire got burned on my manifold then my check engine light came on the wire goes to me smog stuff well i reconected that the check engine light stays on. Well then i started having this problem i didnt know what to do so i went out and bought a new rebuilt oem carb but it still continued. then the car went to the tranny shop and was there for 8 months and i just got it back and all these problems got worse i will start with the timing and see if that helps what should my timing be set to???

 

The check engine light will stay on till you reset the computor,do this by disconnecting the positive battery cable for a few minutes.BUT before you do this check to see what codes have been stored.That will give you what direction to head in.On the timing I don't know what it should be set to for the 2.8(someone else on here probably does).Have you checked thru the V6 board?If your emissions sticker is still on the radiator support/fan guard that should give you factory timing specs.Remember to disconnect the EST sensor wire(tan w/black stripe)located next to the heater/evaporator box before you try to reset/check timing.
Check all your wiring for burnt/loose connections.same with all you vacuum lines.Did you torgue the new carb to specs(Haynes says 132in-lbs) when you installed?

 

yes the carb was tourqed and i cannot get any codes from the check engine light i have bought a new computer after resetting it didnt work the light doesnt even flash between key in the on then the running position doesnt flash at all so i dunno what to do with that still waiting on a timing light but open to some more sugestions thanks in advance

 

Chances are you have a big vacuum leak. The symptoms are classic.

You can use an un-lit propane torch to help find the leak.

 

ok unlit propane torch what does it do when i fint the leak??

 

Propane is a fuel, so the idle speed will pick up significantly.

 

k still havent done anything with my timing but i did find a very large vacum leak so that fixed the probem of almost stalling from a dead stop to WOT but the car is still dieseling as far as still sucking to much gas i dont knwo yet i will let you know on that later. so is it my timing or is my car running to rich??

 

Keep looking for another vacuum leak

 

ok i will do the propane thing when i can get over to the shop i found this one by ear so it was an open vacume hose so sommething had to connect to it so i will look for that too thanks

 

ok i have all the vacume line correctly connected now it seemed to oh helped a little but still didnt fix the deiseling problem i am now smelling something like maybe gas in the car an unusual smell for my car does anyone now how to adjust the oem 2bl carb for a 83 2.8?? or any other suggestions?