Know anything about Chrysler's?
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Lead Driver
Joined: Dec 2002
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From: Kuna ID
Know anything about Chrysler's?
I have this 85 New yorker I have been driving to work to help with gas. I has the turbocharged 2.2 4 popper in it. Car has almost 181k, but it runs pretty good. I did a basic tune up on it, plugs, wires, cap, rotor, fluids changed. The problem is the motor sounds like it is pinging. The gas cap says premium, the first fill-up, I used 87 octane, and it made this noise the whole time, next fill-up I used 90 octane, and nothing changed, it still pings like it did with the 87. The car is fuel injected. Is there anything else I should replace or check. Would a bad O2 sensor cause this, or maybe the timing belt is off? 
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Joined: Jul 2003
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From: Alvin, Texas.
I don't see this as being "just a Chrysler" issue, so that aside, if 90 octane is as good as it gets considering the elevation of Potato, USA, you'll have to settle for that. If not, do as noted.
O2 sensors have almost nothing to do with anything that goes wrong on an engine. Really. The get dirty and little else.
Maybe over time that engine has developed some sort of oil leak--valves, valve seals, rings, etc...--and the resulting carbon has caused hot spots which have caused preignition.
Anyway, since you changed the plugs, what did they "say"? Did any of them come out sooty, different colors? Read the inner cover of the Haynes manual (of course you have one as a guide, if nothing else, right?) and see what tell-tale signs are left for you.
O2 sensors have almost nothing to do with anything that goes wrong on an engine. Really. The get dirty and little else.
Maybe over time that engine has developed some sort of oil leak--valves, valve seals, rings, etc...--and the resulting carbon has caused hot spots which have caused preignition.
Anyway, since you changed the plugs, what did they "say"? Did any of them come out sooty, different colors? Read the inner cover of the Haynes manual (of course you have one as a guide, if nothing else, right?) and see what tell-tale signs are left for you.
Elder User
Joined: May 2005
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From: Graves County, KY
Sounds like 90 octane is still too low for it. If that's the highest available, maybe try some octane booster. I had to do that with the Passat when we went to Montana. It hates anything under 91.
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Lead Driver
Joined: Dec 2002
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From: Kuna ID
The plugs looked pretty normal, clean with no gunk sticking to them. I can find some higher octane, 92 maybe 93, and give that a try, I guess I expected some kind of change in going from 87 to 90.
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From: West Valley Utah
Check the initial timing. You need the computer in service mode to set the initial timing, after that the computer does it's thing. You can try a step colder spark plug also. Don't be concerned about the rough idle, those engines never did have a smooth idle. They also are prone to cracks in the head and head gasket problems at high milage.
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Lead Driver
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From: Kuna ID
The PO told me the temp guage was showing the car was overheating, but he said it wasn't. It has a new radiator, and he had put an entire tube of powdered aluminum in it. The coolant was like soup. The first time I drove it, the gauge read hot. I flushed it, and now it rarely ever creeps past the halfway point. I am guessing the head may be cracked or gasket blown, but the aluminum seems to be working, just didn't need the whole tube in a system this small.
How do I get the comp. in service mode?
How do I get the comp. in service mode?
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Lead Driver
Joined: Dec 2002
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From: Kuna ID
I finally got a chance to put some 93 octane in the car and it barely helped. It's a little quieter, but I can still hear it pinging over the radio. Something else puzzles me about the pinging, when my mustang was pinging, it would ping heavily when I stepped on the gas, and go away as my speed leveled out. With this car, there is almost no pinging when I give it gas, and seems to get worse as my speed levels out. I am not sure how computer controlled this car is, the dizzy appears to be adjustable, should I try and adjust the timing that way?
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From: Colorado
It's due to carbon buildup on the pistons and valves. Those cars will run fine on 87 at any elevation. BTW 87 is our midgrade here.
They sell kits at most parts stores there called top end cleaning kits, or emmision flush kits. Justice Brothers make a very good kit which you can order online, also GM dealers sell a can of top end cleaner too. I'd run one of these kit in it and see what happens. While you at it double check the spark plugs to make sure they are for a turbo application and the correct gap.
They sell kits at most parts stores there called top end cleaning kits, or emmision flush kits. Justice Brothers make a very good kit which you can order online, also GM dealers sell a can of top end cleaner too. I'd run one of these kit in it and see what happens. While you at it double check the spark plugs to make sure they are for a turbo application and the correct gap.
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