|
|
1984 dodge marksman is backfireing and dying at intersections
|
|
|
| |
|
|
gunther000
New User
Jan 26, 2014, 12:25 PM
Post #1 of 6
(1619 views)
|
|
1984 dodge marksman is backfireing and dying at intersections
|
Sign In
|
|
Well I've had problems with it since I've got it. Since I've got it I've replaced the fuel pump, radiator,carberator,most vacume lines,alternator,rotorcap and arm,along with all spark plugs and sparkplug wires. It has a 3.18 5.2l chrysler engine and it dies at intersections if not put into neutral before stopping. It has been getting hot too and can only be started with starting fluid. I have no idea what is wrong so if you have any info on this it will help greatly.
|
|
| |
|
|
kev2
Veteran
Jan 26, 2014, 1:03 PM
Post #2 of 6
(1608 views)
|
|
Re: 1984 dodge marksman is backfireing and dying at intersections
|
Sign In
|
|
this is a basic pickup ? the marksman was a trim package- yes no?
is there a TCC the so called locking converter? Not thinking a 1984 was BUT easier to ask than search texts.
Cooling system- well that is so basic have you checked T'stat - easier to replace than checking them, heater hoses are there as well as bypass hose... radiator it is NOT restricted, both air flow thru and coolant inside... water pump, impeller not worn away, not reverse rotation... correct pressure cap... lower hose not collapsing when operating hot...
on second read is it ideling so poorly that is stalls? did you check engine vacuum, and while holding RPM @1500 observr if it holds steady or drops....this is carburator or fuel injection.... 84 is a long time aago
|
|
| |
|
|
kev2
Veteran
Jan 26, 2014, 1:22 PM
Post #3 of 6
(1602 views)
|
|
Re: 1984 dodge marksman is backfireing and dying at intersections
|
Sign In
|
|
went to the books - wow talk about your basic simple oldie- 318 - 2bbl carb...3speed automatic..
deffinately do the vacuum checking, these were prone to vac issues.
As far as the cooling - as I mentioned basic dbl check everything... from the fan on backwards, missing shroud, missing T'stat... with a new radiator - hopefully as large a model as you could get.... I thing we will find something.
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 26, 2014, 2:51 PM
Post #4 of 6
(1594 views)
|
|
Re: 1984 dodge marksman is backfireing and dying at intersections
|
Sign In
|
|
Ideas and things to check: Definitely vacuum leaks are problem then and now. Timing chain could have jumped. You can watch distributor rotor while turning crank bolt back and forth with marked (if still visible timing marks) get snug to ATDC and see how many degrees you can turn the slack before distributor rotor turns. 5-6 max or trouble. I think you can take off fuel pump and feel the chain on this motor?
Distributor shaft bearing way worn. With timing light and any markings rev engine if timing retards much with no load is an indication of worn shaft bearings.
Compression test would also show universal low compression. You can get real close with timing with a vacuum gauge to actual manifold vacuum and if it takes holding idle at correct RPM. Mark distributor where you began with some dot of paint and can turn distributor if it had be out and timing was lost set vacuum to about 18-18.5 Hg at idle and should do the same held at 2,000 RPM.
Other problems with the era. Early 80s was hell with carbs and really hate ethanol. Float(s) sink and mixture off. Good luck finding the spec but you weight them. If too heavy replace them.
Many carbs if the issue had anti tamper settings for base stall idle and idle mixture that can be adjusted if tamper items removed, clean things up and set right again.
If you don't have a timing light some you can turn engine with fuel disabled by hand with a spark tester on #1 and get a spark real close to the mark.
Car makers really struggled for those last carb years to make them meet emission requirements and kind of rushed a few tricks while still reading for fuel injection to stop the nonsense. Same motor and carb was tons better 10 years older. Try not to fake stuff it can run well unless too worn out it general,
T
|
|
| |
|
|
Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 31, 2014, 10:05 AM
Post #6 of 6
(1532 views)
|
|
Re: 1984 dodge marksman is backfireing and dying at intersections
|
Sign In
|
|
Floats are probably a black plastic - they absorb fuel and sink but not all the way. That is the source of the fuel mixture delivered so if off it would probably dump extra gas or even stall out from just that. WEIGH them OR with top off measure where they do still float to and adjust to that. They stink to get right. Vac leak are more than just hoses. Base of carb and where intake meets heads too but the backfire suggests to me timing has jumped, check as I've never seen one break but go off enough to not run.
This is an interference engine so if that totally fails the engine is junk right away at that age. Not that hard to do those and can tell before you get there - your call,
T
|
|
| |
|
Auto Repair Home
SEARCH
WHO'S 
LOG 
2006 Toyoto Camry XLE Driver Side Electric Window Trouble
Tierod end change caused some kind of leak
Grounding Cable, 2017 Jeep Renegade Trailhawk
equipment
Howdy
