Topic: Turbochargers

[chrisjsmith4]

Yes. I also hooked up the yellow/black rpm signal wire. It is pre loaded but i'm guessing it is more like the 1996 2.5l cause it runs like crap and that is the year of the instructions he gave me. It cuts out big time at more than 3psi boost. cant wait for it to be tuned. I'm so fricken excited. I also found out my lift is on back order which sucks big time.

[sharpxmen]

Yes. I also hooked up the yellow/black rpm signal wire. It is pre loaded but i'm guessing it is more like the 1996 2.5l cause it runs like crap and that is the year of the instructions he gave me. It cuts out big time at more than 3psi boost. cant wait for it to be tuned. I'm so fricken excited. I also found out my lift is on back order which sucks big time.

you can do some pre-tuning if you have an OBDII scan tool (you can get a USB based one for your laptop or even for a PDA) - you probably seen this before but just in case you didn't here's the link for the tuning notes from splitsec http://www.splitsec.com/technotes/Fuel-Engine_in_Boost_using_2-bar_Map_Sensor.pdf

this one also http://www.gadgetonline.com/U-Tune.pdf - there's a link in there for a decent priced ODBII scan tool for $87 (in your case i am pretty sure you need the BR-CAN tool and not BR-3 but check the vehicle list to make sure).

[chrisjsmith4]

So lately its been hit or miss on how it runs. Instead of the heater circuit code coming up it has po442 and p1195. 442 id the evap canister. Thought it might be gas cap. well see. i think it is my pcm. It may be messed up. I picked up a roof rack today for 100 bucks on craigslist. barely used. couldnt pass it up

[chrisjsmith4]

So this morning it barely ran. ran ok yesterday. also the heater cicuit code came up again today. im getting stressed about it. there isnt anything different today. it geels like iys not getting any gas when i give it throttle and if i give it too much throttle it fires throught the intake

[sharpxmen]

So this morning it barely ran. ran ok yesterday. also the heater cicuit code came up again today. im getting stressed about it. there isnt anything different today. it geels like iys not getting any gas when i give it throttle and if i give it too much throttle it fires throught the intake

that def sounds like lean mixture - i would take it for the tuning run first but also ask them to monitor the fuel pressure to make sure your pump is up to par (should keep a steady 49 psi at all times).

[chrisjsmith4]

Ya i've had the presssure tested a couple months ago. Pressure is 49. Not sure what was going on. It ran ok later that day after work then better when I cleared the code. My guess is that my gas cap was not screwed in all the way. I spoke to the mechanic at my work and he said the 1195 code is that I fried my o2 by having exhaust wrap on the downpipe. Which the exhaust place told me to put on. Hopefully my extra one will work after I take off the wrap. Otherwise that is a 120 dollar mistake that I wont be too happy about.

Of course Jeep would not put a shrader valve on the rail for easy pressure testing. I have to take it to a place that has the special tool.

[sharpxmen]

Ya i've had the presssure tested a couple months ago. Pressure is 49. Not sure what was going on. It ran ok later that day after work then better when I cleared the code. My guess is that my gas cap was not screwed in all the way. I spoke to the mechanic at my work and he said the 1195 code is that I fried my o2 by having exhaust wrap on the downpipe. Which the exhaust place told me to put on. Hopefully my extra one will work after I take off the wrap. Otherwise that is a 120 dollar mistake that I wont be too happy about.

Of course Jeep would not put a shrader valve on the rail for easy pressure testing. I have to take it to a place that has the special tool.

did you get it in for tuning?

[chrisjsmith4]

No i havent. yesterday i went and got a new 02 sensor. 4th one ive bought. It seems to be running ok. im gonna see what happens now when the heater circuit code comes back on cause that was the culprit. for some reason it didnt want to run after the code tripped. im gonna order a new pcm on monday and if the light stays off for a while then ill take it in.

[Vodkaman]

Following this thread i thought of a possibility to use PT Cruiser Turbo PCM instead of stock TJ's. They are on sale on e-bay. Do you guys think it is a good idea? Taking into consideration that piggy back system costs about $500, and you have to add to it a wide band O2 sensor with reader, and possibly enricher, and spend a lot time/money for tuning, may be it is easier to reconnect PTC PCM to TJ dashboard and sensors, replace MAP for 2 bar? People do swap engines - so it is possible. OR NOT?

[chrisjsmith4]

You would have to do a lot of research on the two harness and or creat a new one for the tj block. possibly adding sensors as well. if you had a donor car im sure it would be possible. I know airsierra was originally going to do a complete swap but the mounts are different. and other things

[Vodkaman]

Yea, i know The whole engine does not fit TJ, it has o lot of equipment on the back side, but the block is the same. Sierra's magic project still looks like a miracle for me. My question is, if it is same complicity to swap PCM as they do when changing entire engine, i6 or V8?

[Vodkaman]

How is your progress, Chris?

[Jeffy]

Following this thread i thought of a possibility to use PT Cruiser Turbo PCM instead of stock TJ's. They are on sale on e-bay. Do you guys think it is a good idea? Taking into consideration that piggy back system costs about $500, and you have to add to it a wide band O2 sensor with reader, and possibly enricher, and spend a lot time/money for tuning, may be it is easier to reconnect PTC PCM to TJ dashboard and sensors, replace MAP for 2 bar? People do swap engines - so it is possible. OR NOT?

If you look for AirSierra's post you'll find that instead of using the whole engine, he just used the turbo and exhaust manifold. ...less trouble.  You would still need to see if he's got any adapter plates as the manifold needs to be flipped upside down to work in a Jeep.

[Vodkaman]

Put all hardware together is not a problem. Big trouble starts when it comes to fuel management and engine control. In Air Sierra project something very special happened, and he was running turbo on stock TJ's PCM. Does not work in other's people setups. My question is: is the swap of computers more complicated, than it happens when people do an engine swap?

[chrisjsmith4]

I studied his posts for months. Copied and pasted all the really important information with part numbers that I need and could afford at the time. I bought the adapter plate that he had made several of so I could follow just like him.

As of right now the jeep sits and i'm driving my moms RX-8. My mechanic at work thinks that when the jeep goes through the cycles when it hits a certain point it gets really confused and goes into limp mode. that is why it is running really lean and not wanting to go. He told me to start from scratch. Unplug the fuel controller and pull the pipe off the turbo so it is naturally aspirated again. Clear everything on the computer and start it 6 or seven times till any codes have the chance to come back up. If the 135 code comes back up then order a new pcm. So i'll start from scratch except I'll have the bigger injectors in. Then start adding one thing at a time. First the turbo and then the fuel controller. He also was worried that by adding the rpm wire(yellow) to the cam position sensor it messes with the resistance and therefore confused the computer. So maybe need to find another place to put it.

So that is where i'm at. This weekend I will get started. Maybe tomorrow if I have time.