dieseling
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Joined: Nov 2010
Posts: 1
dieseling
Hello everybody! I have a 1981 Monte Carlo with a 229 cid V6. Every so often, the car will diesel when I shut it off. Lately, it has be doing it very badly. Does anybody have any ideas on how to stop this? Also, to anybody else with this engine, what kind of gas mileage are you getting? Thanks!
Joined: Feb 2009
Posts: 2,483
From: lakeland fl
do you have a mecanical fuel pump or a electric one? that out of the way it could be in need of a tune up replace cap rotor wires and plugs. there also may be a problem with the ignition switch and the conectors. i had the same problem with my dads mercury cougar it ended up being the switch feeding power to the system leving it on for a few seconds then turning off. i would do the first simple thing first like the tune up get that out of the way just to see thats not the problem. then go after the ignition wires and the cylender. i would replace the cylender for gigles and get it out of the way just the odvus things are out of the way and also can be over looked
i'm not tooo familiar with the 229 v6 but i asume it's carbed, and probably elecric choke, make sure that isn't sticking on, my 85 did it a bit becuase of that and when i had a cam lobe round off one me but thay was ac ompanied with popping throught the carb and my MPG droped significantly
Joined: May 2009
Posts: 1,910
From: nj
you might want to check your timing. ive had this happen when running a ton of timing, but mine would usually do it in summer not winter. if you cant figure it out you can also shut the car off in gear. it shouldnt do it then. just make sure to put it in park before you get out and walk away.
Monte Of The Month -- August 2012
Joined: Apr 2011
Posts: 6,074
From: Seattle
Carbon buildup in the combustion chamber and cooling system obstructions can cause hot spots that produce dieseling. A vacuum leak causing a high idle or binding linkage that holds the throttle plate open can also cause dieseling. Other causes could be overheating, low octane fuel or ignition timing.
Carbon buildup in the combustion chamber and cooling system obstructions can cause hot spots that produce dieseling. A vacuum leak causing a high idle or binding linkage that holds the throttle plate open can also cause dieseling. Other causes could be overheating, low octane fuel or ignition timing.
Look into all of these issues to fix your problem!
Nicely put Mike!
