Suddenly went into a flashing Neutral position with limited acceleration, should I have another drain and fill done or should I leave the.

Hi Joe,

Thanks for your helpful response. I did have the filter replaced when I had the drain and fill done back in 2020. And it certainly didn't cause new problems to come about. I would say that overall the drivability improved a bit if anything.

The codes are:
P0760 shift solenoid c
P0765 shift solenoid d

I just searched for my vin in the recall search, and there are 2 recalls currently. One is actually related to the automatic transmission:

Manufacturer recall number sr-01-005
NHTSA recall number 01v011001
Recall status recall incomplete
Summary
On affected vehicles, the manufacturing process for the automatic transmission oil cooler hoses allowed a weakness to be present in the internal hose reinforcement. Over time, this weakness can cause automatic transmission fluid (atf) leakage.

Safety risk
ATF leakage in the presence of an ignition source could result in a fire.

Remedy
The dealership will replace the automatic transmission cooler hose assembly (and securing bracket on 1999 Galant vehicles).

Thanks,

Adam

Hi Joe,

That makes sense. Actually, I had the offer to have it done last time I was at the dealership, which was in 2020. But they had to order the parts and it wasn't convenient, so I didn't go back. That's a good idea to start with the recall repair on the transmission hose and go from there. Thanks for the advice and take care.

Adam

Hi Joe,

I ended up getting the transmission cooling hose(s) recall done at the dealer. I also had them do a transmission drain and fill. Evidently Mitsubishi does recommended drain and fills for this transmission, not a flush. And every 30,000 miles they said. It has been only 2 years and 15,000 miles since I did the last drain and fill. However, this only removes half the dirty fluid. Before that I had done a transmission flush about 100,000 miles earlier. So, it still had half super old fluid in there.

After the shift solenoid codes were erased a week ago, they haven't come back yet. Although it was driving on the freeway uphill in the mountains which triggered the symptoms in the transmission. The transmission shop said it may have just been a bubble in the fluid or something like that. They said the shift solenoids all tested as within range.

Thanks,

Adam

Hi Joe,

Here's the update on the transmission and car in general. 6 months ago, we replaced my intake manifold with a junkyard part and that went out completely (it broke off entirely where it connects to the throttle body). Thankfully, this happened at my mechanic's when I was getting the brakes done. I had noticed while driving in the mountains that weekend before that it started shifting really strangely, the RPMs would increase upwards at the end of the shift, like the transmission was slipping. So, I thought the transmission had gotten worse. Anyway, we replaced the intake manifold with a brand-new old stock OEM intake manifold, and all my shifting issues went away. It's shifting like a dream now. I haven't had the shift solenoid code again, and I think we found the culprit of the P0442 code (fuel pressure regulator is leaking, which I ordered a new one).

The only remaining issue is the same low idle problems I've fought for like 8 years now. When the mechanic put my car back together, he reset the base idle speed screw to its default position. So early yesterday morning I was sitting at about 400 RPMs, and it was trying to stall out on me. So, I got a Phillips screwdriver and loosened the BISS a few turns and raised the idle about 300 RPMs. This is kind of a hacky way to fix it, but it at least keeps it from stalling out (this is what we had to do six months ago to stop this issue as well). The most recent thing I did to try and fix this was replacing the Engine Coolant Temperature Sensor, but the issue still persists. I've already replaced the IAC and TPS multiple times. I know for sure the TPS is good, I may try replacing the IAC again. Anyway, this just seems to be some design flaw with these cars. I've seen a ton of threads about the low idle problems in the 2001 through 2005 Eclipses, and never seemed to see any actual resolutions added to the threads. It's my theory that it's these low idle stalling issues along with the intake manifold failures that's causing so many of these cars to end up in junkyards. Anyway, as always thanks for your help and take care.

Adam