Hi everyone, I am sad to report that the expansion valve and drier have not solved my pulsing issue. I continue to get the switching on and off but with slightly cooler air now. If anyone has suggestions I am all ears.

Here are pics of what I pulled out. I got the wrong expansion valve so I had to order another one.

I was surprised at how easy it was to get to the cooling unit (evaporator, fin thermo sensor and expansion valve) . Here's the steps as I couldn't find any instructions anywhere 1. Remove the center trim panel on the passenger side 2. Remove the glove box (two bolts once you drop the glove box...

The clutch is kicking on and off. It only does it when there is enough freon. I started letting some out and it stopped pulsing once I let a little more than half of it out. When I was refilling it with the relay in it started doing it again once I got about 12 oz in it. I had to jump the...

Hey Sirius, check out the videos on page 2, that is how the gauges are reading. Thanks.

OK, so first, I apologize to everyone for taking so long to get back to this issue. I hope you didn't think I abandoned it. I've been working on my 420a car because I need to sell it and it's almost done, then I sold my GTO, bought an B8.5 S4 and have been doing a LOT of mountain biking...

Deric, I haven't messed with the thermo switch, just checked the voltage from the ACCU. Chrysler Kid, I am getting cold air at the vent of 50-53 degrees but I don't know that it's cold enough. Does that still sound like my evap core might be clogged? Have you gotten the pulsing before?

OK, I was able to get the car pulsing today enough for me to test the PIN 1 on the relay and sure enough I lost ground when it was pulsing. This means that I am losing both ground and power on the control side when the pulsing is happening. I feel like I need someone with some electrical...

Dericsh, thanks for sending that thread. I was able to find the ACCU which in my 95 was underneath the the evaporator. I found the Green and Orange wire and I measured the voltage there. I was able to get it pulsing and I got a steady voltage during the pulsing (between 12 and 13 volts) I...

I didn't hear from anyone with confirmation for my testing procedures but I watched enough youtube videos on using a multimeter to test relays until I felt confident. I used some small clips (see picture) that grab onto the edge of the relays so there was almost no way I could have shorted...

Sounds good. You'll have to let us know how it holds up.

What kind of paint did you use? I wanted to do something like this to the heat shield on the DSM but I was afraid it would get too hot and ruin it.

I got Silver's Neomax coilovers installed, RM sway bars and the tint put in so she's finally getting to where I want her to be cosmetically. I did 20% on the front windows and 15% on the back.

I already performed the dual pressure switch check in the Service Manual and when I bypassed it I still got the pulsing so I've eliminated that as a possibility. Sorry I haven't gotten to this yet, my Acura TL (being driven by my son) had the radiator go out and my F150 had the compressor...

Derisch, thanks, that's a great idea. Maybe I can get it to start pulsing by messing some with the wires. I need to pull the ECU anyway to find out what I need for ECM Link but I'd like to do the electrical tests before doing that just so I know what side the issue is on, the ground side or...

Thanks Waltah for the confirmation. I just did the test outside and jumped 4 and 5. The clutch engaged and it did not pulse. I did monitor the gauges and saw that the low pressure got down to between 10 and 18 PSI (hard to tell exactly since the gauge is not marked well) and stayed there...

I am wondering how long it's going to last myself, I'll update after a few months or so. I've looked at the ceramic trim coating but I've heard that once you put that stuff on there it's really difficult to get it off. I feel like I would be ok using the trim dye every six months or so if it...

The car is all painted but it got dirty before I could take more than one pic. I'll wash it and get some more pictures going. In the meantime I've been putting the trunk trim and the backseat trim back in as well as preparing all the exterior trim that looked terrible with the new paint. I...

Sorry man, when I saw the car painted I got really embarrassed about how terrible the trim looked, and the windshield wipers, and that it needs to be lowered and it needs window tint etc etc. I'll get some more paint pics up soon.

Oh, I forgot to include a quick picture of the car with paint. Here it is. Check out my build page if you want to see more.

I got the car back and I immediately needed to do some cosmetic work on it because the paint job is beautiful and is making the old ugly parts stand out. I've got to the point thought that I want to start testing this thing to figure out what is going on. I'm sorry that I am not super...

The car is now in the body shop and getting prepped for paint. Here are some more pics.

As soon as I get her back I'll start testing the circuits of the relay to find out which side the pulsing is coming from. While I was in Jalisco, Mexico for the funeral I passed tons of massive junkyards in Guadalajara just wondering how many eclipses were sitting there. I don't know how...

Hey guys, thanks again for your help, I feel like I am really close to closing in on what's causing the issue. I had a death in the family so I was out of town and then my body shop guy called and told me he was ready. Here are some pics of the car at the shop getting prepared for paint.

I want to thank everyone for their help so far. I started testing down the line here but unfortunately the clutch was kicking in so I couldn't diagnose why it wasn't the other day. So I did test the dual pressure switch and while I was testing it according to the manual it started pulsing...

Wrencher, thanks for the info. I have looked through the service manual several times to see what I can test for but your post and link caused me to take a better look. After I was testing the ISC and I got back home, I wanted to test the idle when turning on or off the AC, well, I couldn't get...

Waltah, thanks for the info, I took what you said and took the car out to test the idle. Since I had changed the IACV I hadn't tested to see if it fixed my issue or not so this gave me an opportunity to do so. Previously, the car would idle a little higher than normal while cold, then it would...

That's exactly what I want to do, get a good diagnosis. I don't know anyone who's really good with electro-mechanical a/c issues. Does everyone agree I should evacuate and refill the system? I know Clipsoe does. I haven't really wanted to do this because it seems to pass the service manual...

Correct me if I'm wrong but aren't I taking the measurement when the compressor clutch is engaged? When the compressor clutch engages the reading goes to 25psi on the low side and when it kicks off it goes back up to 50.

Here is a video of the idle speed while the ac is onhttps://www.youtube.com/watch?v=Cz0mKy-axEMOk, I don't know if that worked or not. Here is take 2

I returned the loaned gauges and bought some of my own and hooked them up. Here is a video of the readings I'm getting now and here is the chart from the service manual.

When I wasn't getting cold air I put a DIY kit on it and charged it up to between 30 and 40 on the gauge (the green section). I don't know that I can get the compressor engaged long enough to get a good reading on it.

Oh, by the way, Waltah you weren't kidding about people avoiding problems. Even though this car only has 91,000 miles and was bone stock I wondered why I got such a great deal on it. Well, this guy lives in a hotter climate then I live in and it's got a host of other little problems that have...

Hi Everyone, thank you so much for your posts, for some reason I haven't been getting notifications through email so I didn't think anyone was responding. Here are answers to the various questions posed. Waltah, you mentioned the idle , I recently pulled the throttle body to replace the shaft...

Even though my ac is messed up I'm really happy that my car is actually helping me figure this out. The whole time I've had this issue I've never been able to catch it on the gauge or have it happen while idling. Here is what happens on the gauge while pulsing. I 'd love to hear what you guys...

Here's an update. I started driving around and got the compressor to come on finally and the car was pulsing but this time was different. The pulsing was stronger, like it was binding up more and this time there was a noise. I stopped in the middle of my street and took a recording.

Actually, I think it was the opposite, the compressor tried to turn on but turned back off and never came back on which is at least partly why my reading is so off. I tried for a few minutes several times to get it to kick on but got nothing. Is this the final nail in the coffin of my...

Hey Waltah, thanks for the info. Here is what I have done so far. I got the manifold gauges and hooked them up and the reading is way off. I have High pressure on the low pressure side and low pressure on the high side. I am uploading a video. So Something is definitely not right. Today I...

Thanks for the info man. After having driven it so many times I can confirm that the pulsing is not the clutch engaging and disengaging because thankfully this makes a pretty loud sound. The pulsing is happening while the clutch is engaged. When the clutch disengages, the car drives normally...

Hey Waltah, thanks for the info. You are certainly correct that I would be engaging in self taught AC as would be the case in just about everything I've done mechanically since I started working on cars. Sometimes I've made some bonehead mistakes (like the time I didn't fully close my BMW's...

Thanks man. I'm ordering the vacuum pump and manifold gauges now. What do you think about the expansion valve? Do I need to change it as well? I'd rather not get into the evap box.

The throttle body is sparkling clean because I did the shaft seals and the gaskets and o ring recently but I never did clean off the IACV. I just pulled it and cleaned it out and put it back in. When I started it up afterward I did notice that when I turned on the AC it clicked on and off...

So my brain has been thinking it's the compressor this whole time but I hate to throw parts at a problem so I'm just trying to narrow down by eliminating anything else it could be. So in various forums and online etc. the IACV comes up as a possible culprit. I have had some intermittent idle...

Cool, so I've got a parts car with a switch in it so I'll throw that in and see what happens. As for the clutch, is there a decent one to buy out there or should I just buy the whole compressor. From what I'm reading here on the forums most people recommend replacing the whole compressor.

Sirius, you mentioned the AC switch and magnet clutch, how did you come up with that?

The pressure is showing in the green. I get the pulsing only when I'm in gear and I don't hear any clicks during the pulses. This is how a drive goes. I start off and everything is normal for about 1-2 minutes. Then I get another 1 - 2 minutes of driving where every two seconds I get the...

Hey Waltah, here is an update, sorry it took me so long I've had a lot going on. So first thing I did since it was the last part of my maintenance since buying the car was the accessory belts. The AC belt was absolutely shot so I thought this might have something to do with it. I replaced it...

So the paint guy is backed up so I am going to start on the interior swap. I pulled out all the interior and then took out the dash.Then I pulled out the carpet pad from both cars and cleaned them.