Bored Throttle Body
Thread Starter
CF Veteran
Joined: Nov 2008
Posts: 1,350
Likes: 5
From: Stokesdale, NC
Year: 89XJ,98ZJ,72K10, 06 Tundra..
Model: Cherokee
Engine: 4.0
TB
$75 shipped to USA and Canada....Ill send $25 back when I get your old core.
82 shipped as of tomorrow......and counting...
THANKS GUYS!!!!!!!!!!!!
82 shipped as of tomorrow......and counting...
THANKS GUYS!!!!!!!!!!!!
Member
Joined: Jan 2011
Posts: 122
Likes: 0
From: Michigan
Year: 1997
Model: Cherokee
Engine: 4.0
Hey, I just got me a tb and installed it and it's feelin like the map sensor is acting up and my check engine light is on. It's a 63mm bore on a 97 xj. And the map sensors only a week old. My question is, is this just my CPU adjusting to the new bore? Or is something wrong? And has anyone encountered this problem?
I posted this at advance tech thread but no answers in the past 2 days
Thank you for your help you guys
I posted this at advance tech thread but no answers in the past 2 days
Thank you for your help you guys
CF Veteran
Joined: Feb 2010
Posts: 3,869
Likes: 2
From: Allentown, Pa
Year: 1994
Model: Cherokee
Engine: 4.0L HO
Originally Posted by Blackwolf
Hey, I just got me a tb and installed it and it's feelin like the map sensor is acting up and my check engine light is on. It's a 63mm bore on a 97 xj. And the map sensors only a week old. My question is, is this just my CPU adjusting to the new bore? Or is something wrong? And has anyone encountered this problem?
I posted this at advance tech thread but no answers in the past 2 days
Thank you for your help you guys
I posted this at advance tech thread but no answers in the past 2 days
Thank you for your help you guys
CF Veteran
Joined: Feb 2010
Posts: 3,869
Likes: 2
From: Allentown, Pa
Year: 1994
Model: Cherokee
Engine: 4.0L HO
Originally Posted by Blackwolf
The lines connected and docent just disconnecting the positive do that?
Thread Starter
CF Veteran
Joined: Nov 2008
Posts: 1,350
Likes: 5
From: Stokesdale, NC
Year: 89XJ,98ZJ,72K10, 06 Tundra..
Model: Cherokee
Engine: 4.0
Flashing the ECU
Taken from GoJeep home page:
Also it is worth erasing the old ECU or PCM memory. Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory.
Reconnect the Battery Cable
Turn Ignition Switch to the “On” position but DO NOT start the engine
Turn Headlight “On”
Turn Headlights “Off”
Turn Ignition Key “Off”
When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory. When you get the engine up to operating temperature, the PCM will start to collect data for the “Adaptive Memory”. The PCM will collect data for Adaptive Memory for the first 50 Warm-up Cycles.
Also it is worth erasing the old ECU or PCM memory. Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory.
Reconnect the Battery Cable
Turn Ignition Switch to the “On” position but DO NOT start the engine
Turn Headlight “On”
Turn Headlights “Off”
Turn Ignition Key “Off”
When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory. When you get the engine up to operating temperature, the PCM will start to collect data for the “Adaptive Memory”. The PCM will collect data for Adaptive Memory for the first 50 Warm-up Cycles.
CF Veteran
Joined: Feb 2010
Posts: 3,869
Likes: 2
From: Allentown, Pa
Year: 1994
Model: Cherokee
Engine: 4.0L HO
Originally Posted by Thexjfiles
Taken from GoJeep home page:
Also it is worth erasing the old ECU or PCM memory. Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory.
Reconnect the Battery Cable
Turn Ignition Switch to the “On” position but DO NOT start the engine
Turn Headlight “On”
Turn Headlights “Off”
Turn Ignition Key “Off”
When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory. When you get the engine up to operating temperature, the PCM will start to collect data for the “Adaptive Memory”. The PCM will collect data for Adaptive Memory for the first 50 Warm-up Cycles.
Also it is worth erasing the old ECU or PCM memory. Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory.
Reconnect the Battery Cable
Turn Ignition Switch to the “On” position but DO NOT start the engine
Turn Headlight “On”
Turn Headlights “Off”
Turn Ignition Key “Off”
When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory. When you get the engine up to operating temperature, the PCM will start to collect data for the “Adaptive Memory”. The PCM will collect data for Adaptive Memory for the first 50 Warm-up Cycles.
CF Veteran
Joined: Feb 2010
Posts: 3,869
Likes: 2
From: Allentown, Pa
Year: 1994
Model: Cherokee
Engine: 4.0L HO
Originally Posted by Blackwolf
A quick question on resetting ecu, the adaptive program will allow my map to adapt to the new t body?
Junior Member
Joined: Dec 2009
Posts: 51
Likes: 0
From: Anaconda, MT
Year: 1997
Model: Cherokee
Engine: 4.0, 99+ intake, SS header w/flex joints, full 2.5" exhaust w/Flowmaster
Yes, you can either touch the positive cable end directly to the negative cable end/battery post or any good body ground point within the positive cable's reach. Easiest way is usually to just touch it to the negative cable/battery post. Be sure to hold it in direct contact for at least 30 seconds to make sure it's fully discharged.
The other part with the key and the headlight is to ready the PCM to learn from scratch again IIRC.
The other part with the key and the headlight is to ready the PCM to learn from scratch again IIRC.
Member
Joined: Jan 2011
Posts: 122
Likes: 0
From: Michigan
Year: 1997
Model: Cherokee
Engine: 4.0
Ok so I hadve tried flashing the ecu 2x now and I was wondering if my dash would give me a confirmation that i did it correctly. Because sofar I have seen no change. I also did a full tuneup( plug, wire, rotor, cap) and still no go. Would a bad fuel pump and bad exaust cause this problem? I All ready ordered me map replacement harness and it should be in tomorrow, so I'll test that theory out tomorrow.
And I read up what a map sensor dose and they say they measure the atmospheric pressure and match it in the intake. If that's true what is the sensor that measures the external pressure? A o2 sensor or something
And I read up what a map sensor dose and they say they measure the atmospheric pressure and match it in the intake. If that's true what is the sensor that measures the external pressure? A o2 sensor or something
CF Veteran
Joined: Feb 2010
Posts: 3,869
Likes: 2
From: Allentown, Pa
Year: 1994
Model: Cherokee
Engine: 4.0L HO
Originally Posted by Blackwolf
Ok so I hadve tried flashing the ecu 2x now and I was wondering if my dash would give me a confirmation that i did it correctly. Because sofar I have seen no change. I also did a full tuneup( plug, wire, rotor, cap) and still no go. Would a bad fuel pump and bad exaust cause this problem? I All ready ordered me map replacement harness and it should be in tomorrow, so I'll test that theory out tomorrow.
And I read up what a map sensor dose and they say they measure the atmospheric pressure and match it in the intake. If that's true what is the sensor that measures the external pressure? A o2 sensor or something
And I read up what a map sensor dose and they say they measure the atmospheric pressure and match it in the intake. If that's true what is the sensor that measures the external pressure? A o2 sensor or something