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air con question


 
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flash54
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Joined: 05 Jun 2017
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PostPosted: Sat Jun 10, 2017 23:22    Post subject: air con question Reply with quote

i got a 99 trooper petrol now the ac compressor kick on the off i checked pressure low side is 17psi high side close to 200psi.I thought about having it all sucked out and retrying but funny thing when you try to add r134 the low side pressure doesn't change but the high side pressure goes up Sad so i don't know what going on with it got my stumped.Did any of you have this trouble i though of taking out one of the shims if there is any in there.
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eithan h
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PostPosted: Sun Jun 11, 2017 10:44    Post subject: Reply with quote

sounds like the expansion valve has gone wrong as when it injects both gauges should move
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because when the dealer is no longer good enough there's still old mill motors....

old mill motors oxfordshires independent isuzu specialists.
http://www.oldmillmotorswitney.co.uk
https://www.facebook.com/OldMillMotors?fref=ts
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flash54
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PostPosted: Sun Jun 11, 2017 16:59    Post subject: air con question Reply with quote

now is that a pain in the rear job say 2 hours or more
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eithan h
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PostPosted: Sun Jun 11, 2017 17:01    Post subject: Reply with quote

no i think as long as the system is empty then you remove the glove box then unbolt the air housing and it slides out then strip the housing down
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because when the dealer is no longer good enough there's still old mill motors....

old mill motors oxfordshires independent isuzu specialists.
http://www.oldmillmotorswitney.co.uk
https://www.facebook.com/OldMillMotors?fref=ts
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flash54
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Joined: 05 Jun 2017
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PostPosted: Sun Jun 11, 2017 17:04    Post subject: air con question Reply with quote

ok have to get it sucked out first thanks for the info
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flash54
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PostPosted: Tue Jun 20, 2017 15:11    Post subject: air con question Reply with quote

eithan h wrote:
no i think as long as the system is empty then you remove the glove box then unbolt the air housing and it slides out then strip the housing down
      ok replaced the expansion valve and drier.I got it recharged to factory 1.32LBS now my question is are the a/c compressors set up from factory timed to cycle off for a short time then kick back on and run is what i mean are these compressors a variable displacement.It seems to run better then it did before
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eithan h
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PostPosted: Tue Jun 20, 2017 18:45    Post subject: Reply with quote

yes they don't run continuously if these did they would freeze up, theres a temp sensor in the evaporator which when it sees a low enough temp it stops the compressor until the evaporator warms up a bit then it kicks it in again
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because when the dealer is no longer good enough there's still old mill motors....

old mill motors oxfordshires independent isuzu specialists.
http://www.oldmillmotorswitney.co.uk
https://www.facebook.com/OldMillMotors?fref=ts
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flash54
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PostPosted: Tue Jun 20, 2017 18:53    Post subject: air con question Reply with quote

then it work the way it should sweeeeet thanks for your help
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flash54
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PostPosted: Fri Jun 23, 2017 0:35    Post subject: Reply with quote

eithan h wrote:
yes they don't run continuously if these did they would freeze up, theres a temp sensor in the evaporator which when it sees a low enough temp it stops the compressor until the evaporator warms up a bit then it kicks it in again
does the ambient air temp sensor have anything to do with the a/c and heat because for some reason there is none in mine but there is a reddish brown connector but no sensor in front of the condenser.The wire connector is over by the drier
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eithan h
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PostPosted: Sat Jun 24, 2017 12:30    Post subject: Reply with quote

no i don't think so
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because when the dealer is no longer good enough there's still old mill motors....

old mill motors oxfordshires independent isuzu specialists.
http://www.oldmillmotorswitney.co.uk
https://www.facebook.com/OldMillMotors?fref=ts
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Aditya Katap
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PostPosted: Thu Oct 03, 2019 13:31    Post subject: Reply with quote

Excellent Thread!
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