Last post on May 09, 2013 at 11:58 AM
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Mitsubishi Diamante, Heating / Cooling, Sedan
#62 of 113 Diamante A/C
Jun 20, 2008 (9:52 am)
It doesn't look like too many people use this forum anymore but here goes. I have a 1992 Diamante with 150,000 miles on it and it has an intermittent A/C problem. Sometimes it works and sometimes it doesn't . When it works it is very cold so I assume the refridgerant is okay. I did have the car with me when I was stationed in Bahrain (middle east) and it started doing it then. The Mitsubishi dealer there told me it was the A/C controller so I found one thru an internet junk dealer and tried it and it do any good, the symtoms changed, so I got another one and that didn't do any good either. Short of taking it back to a dealer, anyone have any ideas as to what it might be.
#63 of 113 Re: Diamante A/C [danno4]
by MrShift@Edmunds HOST
Jun 20, 2008 (10:57 am)
I'd certainly check the refrigerant level. If it drops to a certain pressure, it will turn off the AC compressor clutch.
#64 of 113 Re: Diamante A/C [Mr_Shiftright]
Jun 23, 2008 (9:32 am)
Okay , I'll check that but I assumed (I know ) that if the refrigerant was low , I wouldn't get cold air when it does come on. I'll check it though and get back to you. Thanks.
#65 of 113 Re: Diamante A/C [danno4]
Jul 26, 2008 (4:06 pm)
The system has a dual pressure switch. It senses both too low a pressure AND too high a pressure. On very hot days the pressure can get very high and shut the compressor down for a while. On colder days the pressure tends to be lower and the low pressure function will shut the compressor down for a while.
Of course the design should cope with temperature extremes.
IF the expansion valve is contaminated or there is some moisture in the system, you can have a good low pressure reading on your fill gauges, but when the day is hot, the expansion valve becomes too restricted and the compressor pressure rises too much. Bang, it shuts down.
Conversely, if you lower the pressure by bleeding to avoid this over-pressure, then on cooler days the low pressure switch does its thing.
Sounds like you need COMPETENT professional help.
#66 of 113 O@ Sensor
Aug 26, 2008 (5:55 pm)
Needs replacing. $385 at the dealer. Checking at autopartswarehouse there are different locations before/after catalytic, left/right front, left/right rear. From 50 to 300$ How do I tell what's what?
#67 of 113 Re: Diamante A/C [97diamante]
Aug 27, 2008 (8:14 am)
Thanks. The competent professional help is pay $385 and we will fix it. In checking online, autopartswarehouse.com there are 30+ versions (from $74-$370) of the sensor depending on where it's located before/after catalytic, right/left. I know it's got to be easy to replace and I used to wrench cars before they became so computerized. If I'm looking into the engine compartment is the right side the drivers side or is it opposite that as if you are sitting in the drivers seat?
#68 of 113 O2 Sensor
Aug 27, 2008 (2:10 pm)
Thanks. Is there more than one sensor on the Daimante VR X 2002 or am I over thinking this?
#69 of 113 My Diamante feels like it's swerving on left turns
Nov 29, 2008 (8:23 pm)
I've not noticed this in the past but recently each time I'm driving on a fairly curvy highway, my Diamante feels like it's going to swerv out of control on tight left hand curves. It never does this on right hand turns at all. I've had the tires rotated but that didn't seem to improve anything. Any ideas would sure be appreciated.... Thanks!
#70 of 113 Re: My Diamante feels like it's swerving on left turns [mdc4]
by MrShift@Edmunds HOST
Nov 30, 2008 (6:32 am)
Well you're loading up the right side suspension and it apparently is not happy. So I'd be looking at a blown right side strut/shock, a severe misalignment issue or a worn suspension part such as ball joint, tie rod, etc.
#71 of 113 Re: My Diamante feels like it's swerving on left turns [mdc4]
Nov 30, 2008 (8:44 am)
Actually, I can tell you exactly what it is. It is the rear knuckle-bushings.
They are a typical wear part on these cars, and only these cars.. I know, it sucks.. but also know that if you do not repair these you will tear through tires like nobody’s business..
Unfortunately, you have to go to the stealership for repair, or a specific mits guy, otherwise they will mis-diagnose you with, alignment, shocks/struts, bearings, and the like. I think it ran me about $350-$400 (us) and that included an alignment.