Discovery 2 LS Conversion
#1471
08-03-2023, 08:40 PM
Okay, this is likely a no brainer but on my LS swap the temps slowly climb after about 4 miles of steep grade especially when towing a trailer or my Samurai. Once I pull over and set for a few minutes the temp slowly comes down to normal and I can continue for another mile or so. I am still using the stock radiator but have installed a custom shroud with dual flex a lite low profile fans that meet the cfm requirements of the LS engine. I am using the stock transmission cooler because I bought the custom transmission lines that connect nicely to the stock cooler. I suspect the transmission is getting hot while towing and also the stock radiator may not be quite up to task. I see 3 row aluminum radiators on ebay but just wondering what cure others have used for transmission and engine additional cooling. Other than extreme conditions like Monarch pass and Wolfcreek Pass I've had zero issues when not towing. This beast has been flawless for 15K miles and am loving it. I have consistently gotten over 15 mpg and even gotten as high as 16 at altitude while towing my Samurai. What a great conversion. Thanks again for any help. The Captain Aaron fix of moving the battery cable away from the ckps has been a perfect fix for over 10k miles so thanks again. Wonderful swap and I get many questions about it.
#1472
08-04-2023, 07:08 AM
Rover Discovery getting hot
Now I never thought of checking that setting. I have always heard the fans when climbing these steep grades but now not certain what they are doing at 65mph, etc. Will check since I have the tune saved on hptuners software. Thanks for the heads up. Such a great truck now. I've had at least 5 of these and this is the first one I don't want to sell. Lol
#1474
09-12-2023, 12:49 PM
Update: I was able to get ahold of the original purchaser and get the instructions off the website.
I'm hoping someone might be kind enough to help me track down the ACE LS Swap instructions. I purchased an ACE kit from a guy that bought from ACE, but never used the kit. I didn't realize the instructions were on ACE's website only. I've tried creating a login for ACE's website and emailed them, but I'm not getting any response. The original purchaser of the kit isn't responsive to my request.
I've got the kit still in the original boxes but would like to see ACE's instructions. Mainly when it comes to the wiring.
Can anyone help me out? Does anyone know a better way to contact ACE rather than email them? Are they still in operation?
Thank you
Brian
I'm hoping someone might be kind enough to help me track down the ACE LS Swap instructions. I purchased an ACE kit from a guy that bought from ACE, but never used the kit. I didn't realize the instructions were on ACE's website only. I've tried creating a login for ACE's website and emailed them, but I'm not getting any response. The original purchaser of the kit isn't responsive to my request.
I've got the kit still in the original boxes but would like to see ACE's instructions. Mainly when it comes to the wiring.
Can anyone help me out? Does anyone know a better way to contact ACE rather than email them? Are they still in operation?
Thank you
Brian
Last edited by A0B1732; 09-15-2023 at 01:24 PM.
#1476
09-29-2023, 01:59 PM
I'm at a stumbling point. I have triple checked all my wiring, and it's exactly as ACE describes. I had my VATS removed and checked by two different people. But it still acts like VATS is present.
One thing is that my oil sensor might be wired incorrectly. Does anyone know if that sensor communicates with the disco ECM or does it just energize a light on the dash? I ask because I'm wondering if the Disco ECM is shutting the party down early because it thinks there's no oil pressure. What do y'all think?
--Thanks, Chris
One thing is that my oil sensor might be wired incorrectly. Does anyone know if that sensor communicates with the disco ECM or does it just energize a light on the dash? I ask because I'm wondering if the Disco ECM is shutting the party down early because it thinks there's no oil pressure. What do y'all think?
--Thanks, Chris
#1477
09-29-2023, 03:26 PM
I'm at a stumbling point. I have triple checked all my wiring, and it's exactly as ACE describes. I had my VATS removed and checked by two different people. But it still acts like VATS is present.
One thing is that my oil sensor might be wired incorrectly. Does anyone know if that sensor communicates with the disco ECM or does it just energize a light on the dash? I ask because I'm wondering if the Disco ECM is shutting the party down early because it thinks there's no oil pressure. What do y'all think?
--Thanks, Chris
One thing is that my oil sensor might be wired incorrectly. Does anyone know if that sensor communicates with the disco ECM or does it just energize a light on the dash? I ask because I'm wondering if the Disco ECM is shutting the party down early because it thinks there's no oil pressure. What do y'all think?
--Thanks, Chris
If you have no fuel pressure, then look at Discovery wiring harness, sensors, etc.
If you have no spark, then look at the GM ECM, or the start wire for the GM ECM (for test - connect OBD2 reader to GM OBD2 port to make sure GM ECM has power when key at position 2/accessory).
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landed.gentry (09-29-2023)
#1478
09-29-2023, 05:41 PM
As far as I know, the oil pressure sensor is not part of red-blue GM ECM or the Disco ECU.
If you have no fuel pressure, then look at Discovery wiring harness, sensors, etc.
If you have no spark, then look at the GM ECM, or the start wire for the GM ECM (for test - connect OBD2 reader to GM OBD2 port to make sure GM ECM has power when key at position 2/accessory).
If you have no fuel pressure, then look at Discovery wiring harness, sensors, etc.
If you have no spark, then look at the GM ECM, or the start wire for the GM ECM (for test - connect OBD2 reader to GM OBD2 port to make sure GM ECM has power when key at position 2/accessory).
I will say that I purchased a ACE kit retail, but I didn't get instructions. Someone else provided me with documentation electronically. So I would love to get the latest greatest instructions because, well, I paid $2,300 for them, but I can't get a response from ACE
#1479
09-29-2023, 08:59 PM
Rock Crawling
As CaptainAaron stated above. “Sensors …
If you have no spark, then look at the GM ECM, or the start wire for the GM ECM (for test - connect OBD2 reader to GM OBD2 port to make sure GM ECM has power when key at position 2/accessory).”
I initially had both of these particular issues. On the sensors I forgot to plug in MAP sensor and had same symptoms
good to go over…in the troubleshooting section.
General Electrical
My Discovery will not run.
There are four things an engine needs to run: fuel, air, spark, and timing. Most issues with this swap are to do with inadequate fuel. While cranking, check the fuel pressure on the LS engine, if it is between 50-60 psi, all is well. If it is not, the try jumping the Rover fuel relay, if this works, then the issue is with the Rover side of the electrical, most likely the positioning of the crankshaft position sensor. If there is fuel, then check for no spark. If there is no spark, the issue is on the GM side of the electrical. If there is neither fuel or spark, check the condition of the battery, and make sure the alarm is disarmed.
If you have no spark, then look at the GM ECM, or the start wire for the GM ECM (for test - connect OBD2 reader to GM OBD2 port to make sure GM ECM has power when key at position 2/accessory).”
I initially had both of these particular issues. On the sensors I forgot to plug in MAP sensor and had same symptoms
good to go over…in the troubleshooting section.
General Electrical
My Discovery will not run.
There are four things an engine needs to run: fuel, air, spark, and timing. Most issues with this swap are to do with inadequate fuel. While cranking, check the fuel pressure on the LS engine, if it is between 50-60 psi, all is well. If it is not, the try jumping the Rover fuel relay, if this works, then the issue is with the Rover side of the electrical, most likely the positioning of the crankshaft position sensor. If there is fuel, then check for no spark. If there is no spark, the issue is on the GM side of the electrical. If there is neither fuel or spark, check the condition of the battery, and make sure the alarm is disarmed.
Last edited by 04disco2va; 09-29-2023 at 09:13 PM.