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post #1 of 11 Old 12-20-2017, 08:19 PM Thread Starter
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Hemi JK Hack Help

Hi All,

I have acquired 2008 JKU with what I think is 2011 5.7 Truck Motor, 545 Transmission, 2011 pcm,and modified stock wiring harness. I have several problems I am trying to chase down and fix.
1 - One of the main problems is according to the e-test station none of the monitors are working, meaning the 02 aren't reporting. I believe that would be causing this to run in open loop all the time, making it super rich and bad performance. I am not sure how to trace this back to fix it or test it. Any tips?

2 - I believe the engine mounts are custom made and too high. Does anyone have a bolt in or weld in set of mounts they sell?


Any tips or tricks would be greatly appreciated!

Thanks, Matt
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post #2 of 11 Old 12-20-2017, 09:27 PM
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Its been a long time since I had to deal with emissions issues on a hemi conversion. But I don't think the monitors have anything to do with the O2 sensors function. The O2 sensors should function just fine without the monitors being active. Therefore, I don't think you should be in a open loop condition, but I am no expert.

You said that the emissions testing station told you the monitors were not active. If you were asking for a fix specifically for this, well, good luck. That is all buried deep in the ECU programming. And if your monitors are not active, you will need a completely new program. And I am not talking about something from some tuner shop or Diablo or anything like that. Basically, you need a stock tune that has been modified for your application. No idea how you go about getting that accomplished.

If your goal is to get this to pass emissions, and they are going to be sticklers for functioning monitors, I think you are hosed. I know I was....................
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post #3 of 11 Old 12-21-2017, 08:03 AM
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Quote:
Originally Posted by mdurbahn View Post
Hi All,

I have acquired 2008 JKU with what I think is 2011 5.7 Truck Motor, 545 Transmission, 2011 pcm,and modified stock wiring harness. I have several problems I am trying to chase down and fix.
1 - One of the main problems is according to the e-test station none of the monitors are working, meaning the 02 aren't reporting. I believe that would be causing this to run in open loop all the time, making it super rich and bad performance. I am not sure how to trace this back to fix it or test it. Any tips?

2 - I believe the engine mounts are custom made and too high. Does anyone have a bolt in or weld in set of mounts they sell?


Any tips or tricks would be greatly appreciated!

Thanks, Matt
OK.. this is going to ugly for you really quickly.
first, what state are you in?
next, is it a car hemi or a truck? mechanical fan?
are you sure its a 2011? the transmission for the 2011 needs to have the solenoid pack changed to a 2010 down for the swap to work in most applications.
search my user name and look at the fun I've had trying to get my 2011 hemi to pass in CA.

edit..
when I got my custom harness for my hemi I compared it to the stock grand charokee harness, there are several wires that need to be added. I would bet that not all of your gauges work.
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post #4 of 11 Old 12-21-2017, 10:12 AM Thread Starter
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Quote:
Originally Posted by Nucleophile View Post
Its been a long time since I had to deal with emissions issues on a hemi conversion. But I don't think the monitors have anything to do with the O2 sensors function. The O2 sensors should function just fine without the monitors being active. Therefore, I don't think you should be in a open loop condition, but I am no expert.

You said that the emissions testing station told you the monitors were not active. If you were asking for a fix specifically for this, well, good luck. That is all buried deep in the ECU programming. And if your monitors are not active, you will need a completely new program. And I am not talking about something from some tuner shop or Diablo or anything like that. Basically, you need a stock tune that has been modified for your application. No idea how you go about getting that accomplished.

If your goal is to get this to pass emissions, and they are going to be sticklers for functioning monitors, I think you are hosed. I know I was....................
Hi Thanks for the reply! My #1 goal is to make sure it is running correctly, my secondary goal would be to pass emissions BUT I can still register it without that function but it would be better if everything worked correctly. I am pretty new to emissions lingo but I thought "monitors" meant O2 sensors? But then again I am not sure how to verify any of it unless I talk to a specialty tuner maybe?


Quote:
Originally Posted by elusive View Post
OK.. this is going to ugly for you really quickly.
first, what state are you in?
next, is it a car hemi or a truck? mechanical fan?
are you sure its a 2011? the transmission for the 2011 needs to have the solenoid pack changed to a 2010 down for the swap to work in most applications.
search my user name and look at the fun I've had trying to get my 2011 hemi to pass in CA.

edit..
when I got my custom harness for my hemi I compared it to the stock grand charokee harness, there are several wires that need to be added. I would bet that not all of your gauges work.
Hi, LOL yes this has been very ugly for me for a variety of reasons (I got plates yesterday and bought it in June as a 100% complete LOL). As far as we can tell it is a 2011 truck motor and I was told it was a 2011 truck transmission with a 2010 ram computer(I said 2011 above but that was wrong). I will definately search you name to see what you have been going through! Can you elaborate on what you mean about the transmission solenoid pack? Is there a way to test or check if this has been done? My vehicle is currently running/driving as is and it seems like the transmission works properly.
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post #5 of 11 Old 12-21-2017, 11:26 AM
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if the trans shifts out of 2nd then don't worry about the solenoid pack.
if you need to pass CA emissions.. too bad. it wont.
who flashed the computer?
what codes are you getting?
a good scanner will tell you what monitors are active. id have a decent shop hook up their diagnostic scanner and see what monitors are on. then see what codes you have.
otherwise,
I'd just drive it.
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post #6 of 11 Old 12-21-2017, 02:38 PM
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Quote:
Originally Posted by mdurbahn View Post
Hi Thanks for the reply! My #1 goal is to make sure it is running correctly, my secondary goal would be to pass emissions BUT I can still register it without that function but it would be better if everything worked correctly. I am pretty new to emissions lingo but I thought "monitors" meant O2 sensors? But then again I am not sure how to verify any of it unless I talk to a specialty tuner maybe?




Hi, LOL yes this has been very ugly for me for a variety of reasons (I got plates yesterday and bought it in June as a 100% complete LOL). As far as we can tell it is a 2011 truck motor and I was told it was a 2011 truck transmission with a 2010 ram computer(I said 2011 above but that was wrong). I will definately search you name to see what you have been going through! Can you elaborate on what you mean about the transmission solenoid pack? Is there a way to test or check if this has been done? My vehicle is currently running/driving as is and it seems like the transmission works properly.
If you have plates, why the concern about emissions? Or did you buy it in state so you were able to plate it, but may have to pass an emissions test in the future??

I am no expert, but emissions monitors are basically tests the ECU does to make sure the emissions equipment is working correctly. It periodically will test things like the vapor recovery system. If the test fails it lights the CEL. Which is why a lot of emissions testing in the country is just to verify that the CEL is not lit.

If you are concerned about passing future emissions testing, you should do your homework as to what you will be up against. Here in CO, emissions testing along the front range varies by model year. There are also special issues if you have oversized tires. It gets pretty complicated. Throw in the remote testing along freeway on ramps, and it can be pretty complex. (But just in case you are in CO, forget about passing the remote testing. The parameters are much more stringent than the IM240 testing at the Air Care Colorado test stations. )
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post #7 of 11 Old 12-21-2017, 02:39 PM Thread Starter
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Quote:
Originally Posted by elusive View Post
if the trans shifts out of 2nd then don't worry about the solenoid pack.
if you need to pass CA emissions.. too bad. it wont.
who flashed the computer?
what codes are you getting?
a good scanner will tell you what monitors are active. id have a decent shop hook up their diagnostic scanner and see what monitors are on. then see what codes you have.
otherwise,
I'd just drive it.
Thanks, I was told the computer is stock, not flashed? The codes I am getting are p0157 (O2), p2008(intake runner), and p2017(intake runner). I have been planning to get a better scanner, I am only using a bluetooth one with the torque app.

2008 JKU Hemi Project
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post #8 of 11 Old 12-21-2017, 02:51 PM
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Does it have 6.1 intake on it?
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post #9 of 11 Old 12-21-2017, 08:43 PM
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Any idea whose conversion this is? If you can determine the vendor they may have solutions for your issues. An acquaintance bought a Hemi converted ‘07 with a kit from Burnsville (Dakota Customs) a couple years ago that had all kinds of issues. He met with them at Easter Jeep and an hour later they had everything working, identified his powertrain year and type, etc. So, if you can determine the conversion source you’ll be ahead.

'09 JKRU. 4" Teraflex long arm, Teraflex R44 housing, Teraflex / Fox Resis, Poly Performance skids, Nemesis Billy Rockers, Nemesis flares, 37" ATZ P3s on 17" 5x5.5" Trailready HDs, Spyntec hubs, Teraflex BBK, Mopar BBK master/booster, Superior front & Alloy USA rear axle shafts, CTMs, Reids, Synergy drag link & tie rod, WTOR hydro-boosted steering, 5.38s, TF Dual Rate front bar, TF bumpers, Warn Powerplant, Tom Woods shafts, AA xfer case cable, Kilby canister relo, RH4x4 cage.
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post #10 of 11 Old 12-22-2017, 02:25 AM
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A friend just did the 5.7 conversion and they got a install kit that came with a wiring harness specially for the conversion. Yours is a modded stock one you say that could be most of the communicative errors some how? Ive had 2 5.7,s for 7 years one a 2012 truck the other a 2010 300c. Theres places that reflash the computers in Florida or sell new refurbished ones with warrantee for about 350-400 bucks. These guys know there stuff on the PCM and ECM,s I had to replace my ecm once before. The Computer for those motors is very extensive and controls everything i mean everything. So between the wiring harness and the ECM Im wondering if replacing one first then the other could find the gremlins? Pin pointing stuff is very hard as most things will be simply solved by replacing the computer reflashed. i think SoK66,s comment on whos install and talking to them would be your best bet. Youll get it figured out its just a motor and some wiring. haha You could also try getting a hold of these guys. Great article on the swap. http://www.fourwheeler.com/how-to/en...get-hemi-swap/

2014 JK 2 Door

Last edited by whipper; 12-22-2017 at 02:29 AM.
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post #11 of 11 Old 12-22-2017, 10:00 AM
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Quote:
Originally Posted by mdurbahn View Post
Hi All,

I have acquired 2008 JKU with what I think is 2011 5.7 Truck Motor, 545 Transmission, 2011 pcm,and modified stock wiring harness. I have several problems I am trying to chase down and fix.
1 - One of the main problems is according to the e-test station none of the monitors are working, meaning the 02 aren't reporting. I believe that would be causing this to run in open loop all the time, making it super rich and bad performance. I am not sure how to trace this back to fix it or test it. Any tips?

2 - I believe the engine mounts are custom made and too high. Does anyone have a bolt in or weld in set of mounts they sell?


Any tips or tricks would be greatly appreciated!

Thanks, Matt
I know AEV makes engine mounts that are bolt and weld on.

Matt
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