Volvo - 240 :: 1990 - AC Compressor Not Cutting On
Mar 6, 2011
1990 Volvo 240. The ac doesn't work and about 6 yrs ago it was converted to r134a. How can I check it see whats wrong?
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Mar 6, 2011
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Mazda - Miata :: 1990 - A/C Not Working - Change Compressor?
I have a 1990 Mazda Miata, and the AC is not working. It has been switched over to R134a. I took it to a mechanic to have it recharged a few weeks ago. He said that one of the o-rings was cracked and so it was leaking around that. He filled it up and put some stop leak in it and for awhile it seemed to work fine. Then it stopped blowing cold air. I took it to a jiffy lube just to have the level of coolant (correct term?) checked. The person there told me that it was very low and was leaking around the valve stems. I tightened the valve stems and re-filled it. After 24 hours it had stopped blowing cold air again. I got a price quote on a new compressor and it is about $500.
So - my question is this - should I just put a new compressor in or is there something cheaper I could try first?
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My beautiful 1990 Volvo 240 will not shift into 4th gear! It is an automatic. The OD light will go on and off and I can hear it click when I turn it on. I just noticed that when getting on the highway it seemed as if the RPM was a little too high so I started paying more attention to which gear it was in and noticed today that it stays in 3rd gear.
I have already replaced the fuse #11. With the OD seemingly working fine, should I mess with the relay?
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Trying to find a path to go on since the new pump seems to give plenty of pressure.
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My 1990 740 will not start. These are the tests I have completed:
Starter and battery are in good condition.
The fuel pump works, it delivers fuel pressure on initial starting.
The plugs are new and gaped correctly.
I am getting a good spark at all plugs.
I have tested for power at the cold start valve. It is connected to the top of the starter and is at 9 volts while starting the engine.
The timing belt is new and is operating correctly. The engine is timed correctly.
I have noticed that there is no fuel getting to the plugs. I pulled one and it is dry.
The code is 3-2-1. Cold Start valve? It is 75 degrees.....the car should start?
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So I am on my way home after an honest 8, and I make it a mile down the road and goose the old girl a little off a stop light. Well next thing I know we have smoke rolling out under the hood, well it turns out the "smoke" was r134 refrigerant. The guy that recharged it said that the compressor failed and that its common with retrofits because 134a runs at a higher pressure.
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I drive a 1990 240 with close to 300,000 miles on it. Haven’t had any troubles with it in the 1-2 years I’ve had it.
Recently went in to get my smog checked and failed two of the three tests: the functional and emissions. I've attached the VIR.
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What are the common sources for a failed smog check? I plan on getting a diagnostic later in the week/
smogcheckVIR.png ( 1.93MB )
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Found out how to check each sensor and component individually.
All sensors and components are working. Checked both fuel pumps and they are working. If I unplug the air flow sensor and the air control valve sensor, I can start the car using starter fluid and it will idle all day with out missing a lick.If I plug in either one of the sensors, it will kill it immediately.I don’t know what else to do to make this machine run.
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