Sorry if this is a redundant thread, but I am new to this forum. There is 2 parts to my current situation, so sorry for the long winded thread.

I recently changed my transmission filter at 109Kmi because I could not find a service history that indicated that it was changed at the recommended 30Kmi marker. I found the filter at Autozone and didn't think much of it until I actually removed the filter. The one from Autozone did not have a pick up tube, but it was too late to get the one with pick up tube because all the auto parts store was closed. I decided, (and keep in mind, 2mths ago I did even know how to change the oil, so this was based on pure ignorance), too not wait until the next day and order one from AB and installed the one I had. It looked like it did the job because the filter part opened up. I filled the transmission fluid and then test drove it. Everything seemed like it was in working order. 2 days later, I was parked on a hill and tried to reverse and felt my car not reversing, but instead it just rolled forward. So I guess that was a slip. That concerned me, so the next day instead of getting a new filter, I drained the fluid and refilled it with a new bottle. What a waste of money. But I did this because the guy at the parts store that worked at a land rover dealership said that the filter was fine and did the same thing. Well I guess I didn't fill the fluid correctly the second time and the transmission wouldnt shift gears and was reving up at high RPMS. Then my Service Engine light came on. I stopped driving immediately and got filter from AB. Switched it out, made sure the fluid was filled correctly and my car had no gear issues. Service Engine light stayed on so after a day of it being on, I took it to OReilys. I had a 4th gear ratio code. I explained my situation he said that it just needs to cycle. So I thought it made sense, left it alone.

Then today I decided to use the seafoam for induction cleaning and followed the steps of slowly filling my disco with seafoam through the vacuum hose that was suggested. I accidentally let it fill too quickly towards the end and my car just stalled. I turned it off and waited 30 min. It had trouble starting but it did after 2-3 sec. The idle was at a low RPM so I decided to rev the engine. The service engine light then decided to flash. After 30 sec, it stopped flashing and everything was back to normal with the light just being solid. Drove it for about 10 miles with a half tank of gas and it drives really smooth now. Well I was passing Autozone and just wanted to make sure that the Service light wasnt an issue. I was surprised to hear that now I have 9 fault codes. Misfire from all cylinders, gears 2 and 3 now and something with Solienid. My problem with this is, my car runs great. Am I missing something here? Any help would be great. Thanks

 

Have them clear the codes and see if they come back on. Hopefully your head gasket wasn't ready to go, and the seafoam cleaned whatever gunk was sealing the deteriorating gasket. I think that's what happened with my blown head gasket. If the engine runs smooth, and you have no hesitation, you rob ably just need to clear the codes

 

I was hoping they could, but I think I have to take it to a dealership. So I will try to go tomorrow. I spent 2 weeks last month changing out my valve cover gaskets, intake gasket, manifold gasket, water pump, all the spark plugs and new ignition wires, NGK, not the recommended 8mm STI. It was too late for me, I had already changed it. So I hope that its not a Head Gasket issue. Thanks for the advice.

 

Can I reset the service engine light myself? Before I changed out those parts mentioned, my service engine light was on and flashing. After 2 weeks of having the battery out, it went away. Did I reset it myself then or was that just because the issue was resolved?

 

That, I don't know. Pretty much a noob when it comes to vehicle mechanics. Hopefully someone much smarter will reply soon.

 

So, as a self proclaimed novice, how difficult did you feel the lower intake manifold and valve cover gasket job was to do?

 

Auto parts store can read codes and clear them as well.

 

It was more challenging than I anticipated. My biggest obstacle that I ran into was the viscous fan. I rented the 36mm fan clutch removal tool from Auto Zone. My suggestion would be to just get a crescent wrench and a torx screw (don't remember the size off hand). A lot of people suggested putting the wrench in the nut that connects the fan to the water pump pulley and whack it really hard. That did not work for me. I used the torx screw on the pulley that connected to the alternator to prevent the water pump pulley from moving and used a lot force with on the crescent wrench on the nut that connected the fan to un screw and it came right off. Didn't like the hammer suggestion at all.

Rest was pretty much on point with Rave and suggestion with these forums. I just spent a lot time cleaning the parts and engine area. If you are going to attempt this job and it is going to be the first time, make sure you do a lot of research, take lots of pictures, and have access to the internet. If you have questions feel free to ask me and I can help you to the best of my ability. Good luck.

 

I personally suggest getting an ultra gauge. Gives you real time temp data (among other things) and can read and reset codes. Tons of info on it here, just search.

FYI doing the sea foam gave me cylinder misfires as well. I wound up needing new coils. I wonder if the sea foam exposed this issue or caused it? I'm not mechanically intelligent enough to know, but they showed up immediately after the sea foam. And my engine still has a slight shudder even after sea foam, new plugs and wires, head gaskets, etc. about the only thing I haven't done is o2 sensors...

 

FYI doing the sea foam gave me cylinder misfires as well. I wound up needing new coils. I wonder if the sea foam exposed this issue or caused it?

UPDATE
This morning I went to O Reilys and got my code checked again and the misfires are no longer a fault code. So I truly believe the misfire code was more of a User Error on my part with the SeaFoam. Towards the end of the bottle, I let the vacuum extract the liquid too fast, which stalled my engine and then caused it to misfire when I started the engine after the suggested 30 min wait. Currently I do not feel any misfire nor did I feel any yesterday when it was suggested that all my cylinders were misfiring.

I do not notice too much improvements to performance with SeaFoam, but I will monitor my gas mileage to see if that improves.

Only codes that I am getting now is back to the transmission filter replacement issue. Now I have a 2 and 4 gear ratio fault code, which I am hoping it will clear itself after I put more mileage on the car. My Disco runs great right now and I hope after a few days that code will just reset itself.

As far as resetting codes from an Auto Parts Store in Missouri. There is apparently a law that prevents Auto Parts Stores to reset the code. I will look into getting a scanner.

If anyone has experienced the Gear Ratio fault codes and can shine some light on that, I would be very appreciative.