Hi all,
I have a 1994 Mitsubishi Delica and the air con runs at around 8-10 degrees at idle, but cools to 5 degrees when the engine is at 2000rpm. It always gets "cool" but not cold at idle. So on a hot day its useless.
It has had new Tx valves, new compressor, new dryer, a system flush and a second compressor just in case the first new one was a dud. I also put in new electric fans on the condenser and checked their operation. The engine fan is working fine. I have also tried spraying water onto the condenser at idle with no effect on the air con performance. The only thing that changes the temp is RPM up at 2000. Have driven it at low speed and high revs - air con stays cold. Have driven at low speed in high gear and it warms up. Have driven it at high speed in high gear - air con warms up. Have driven it at high speed in low gear and it cools down. So, air flow does not seem to be the answer.
The gauge pressures read just fine while the engine is cold, but as it warms up the high side goes high and stays there.
This vehicle has front and rear cooling with a switch to go front only or rear only or front and rear. At idle it cools at 10 degrees with both on and 8 with either one on separately. That means there are two Tx valves. Both have been replaced.
Also, on start up the system takes a long time to pull down to 10 degrees.
So I have no more ideas as to why this sucker runs warm below 2000rpm.
Any thoughts appreciated.
I have a 1994 Mitsubishi Delica and the air con runs at around 8-10 degrees at idle, but cools to 5 degrees when the engine is at 2000rpm. It always gets "cool" but not cold at idle. So on a hot day its useless.
It has had new Tx valves, new compressor, new dryer, a system flush and a second compressor just in case the first new one was a dud. I also put in new electric fans on the condenser and checked their operation. The engine fan is working fine. I have also tried spraying water onto the condenser at idle with no effect on the air con performance. The only thing that changes the temp is RPM up at 2000. Have driven it at low speed and high revs - air con stays cold. Have driven at low speed in high gear and it warms up. Have driven it at high speed in high gear - air con warms up. Have driven it at high speed in low gear and it cools down. So, air flow does not seem to be the answer.
The gauge pressures read just fine while the engine is cold, but as it warms up the high side goes high and stays there.
This vehicle has front and rear cooling with a switch to go front only or rear only or front and rear. At idle it cools at 10 degrees with both on and 8 with either one on separately. That means there are two Tx valves. Both have been replaced.
Also, on start up the system takes a long time to pull down to 10 degrees.
So I have no more ideas as to why this sucker runs warm below 2000rpm.
Any thoughts appreciated.
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