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help!tps location?

On the drivers side, front of the throttle body, also the throttle body is on the drivers side of the valve cover, top of the engine. If you search it there are links to sites with pictures, and even some pictures here in the threads here somewhere.
 
Hope this helps, this is on a 1995

engine01.jpg


engine02a.jpg
 
Idle Air Control valve, it controls the idle speed by moving a small plunger in and out depending on what the PCM tells it...
 
Sorry, I forgot there are people out that can afford newer jeeps, LOL. My answer below was for the older, more elegant, Renix 87-90 Jeeps.

Any way ignor my original answer, does not apply to your your, 99.

So when did they move the TPS and IAC to rear of the throttle body, in 91 or 97, or ??? I also see they moved the throttle linkage to the front side.

Ecomike said:
On the drivers side, front of the throttle body, also the throttle body is on the drivers side of the valve cover, top of the engine. If you search it there are links to sites with pictures, and even some pictures here in the threads here somewhere.
Click to expand...
 
I DISCONNECTED THE BATTERY AND NOW THE CHECK ENGINE LIGHT IS OFF BUT NOW THE STUMBLING IS BACK ANY IDEAS WHAT THE PROBLEM IS? I COULD UNDERSTAND IF IT WAS STUMBLING WITH CE LIGHTON BUT WHAT THE HELL THANKS ,JOHN
 
Mike I think it's a HO thing :eeks1:

well a sensor will throw a code, so if no CEL is on it could be fuel. Drive it around the neighborhood and see if it throws a code. If it does go to the "Zone" and have them put a scanner on it (for free).
 
I was thinking it might be an HO think, but I have yet to work on 91 to 95, so I was not dure, maybe some can confirm for sure.

Jeepsloth said:
Mike I think it's a HO thing :eeks1:

well a sensor will throw a code, so if no CEL is on it could be fuel. Drive it around the neighborhood and see if it throws a code. If it does go to the "Zone" and have them put a scanner on it (for free).
Click to expand...

He mentioned stumbling returning, meaning it came and went, so did he reset a code maybe for poor O2 sensor, that the PCM is trying to use again, thus causing the stumbling again until the PCM throws a code again? When it throws a code, sometimes it goes into an open loop mode and runs OK because it ignoring the bad part. But it might be causing excess emissions and be burining extra fuel at the same time, ouch!

He does need to get the free scan now and after the check engine light comes back on and / or after the stumbling stops again.
 
willow72 said:
I DISCONNECTED THE BATTERY AND NOW THE CHECK ENGINE LIGHT IS OFF BUT NOW THE STUMBLING IS BACK ANY IDEAS WHAT THE PROBLEM IS? I COULD UNDERSTAND IF IT WAS STUMBLING WITH CE LIGHTON BUT WHAT THE HELL THANKS ,JOHN
Click to expand...

its because your caps lock is on.

it may stumble when the TB, and IAC need to be cleaned out, loss of fuel pressure, intermittent spark, etc.

does it stumble on idle or acceleration?
 
I thought if the battery was disconnected long enough to clear any codes, the ECU had the "relearn" the proper settings.

Mine's the more "elegant" Renix so we done have this "feature".
 
Saudade said:
I thought if the battery was disconnected long enough to clear any codes, the ECU had the "relearn" the proper settings.

Mine's the more "elegant" Renix so we done have this "feature".
Click to expand...

Contrary to popular opinion I have found Renix FSM references (1987) and a direct hot all the time battery wire to the Renix ECU that confirms that the Renix ECU does have some volatile (erasable by disconnecting the battery...) sensor memory storage. Turns out the TCU computer also has a pull the battery erasable memory as well!

Both memories store recent sensor data values and help the computers decide if a sensor value it receives is out of the historical upper and lower bounds, or if the sensor has been sending bad data long enough that the ECU should ignor it.
 
well i drove it all day yesterday its still stumbling and it wont turn on the check engine lite so i guess i can check for any codes. is there another to check the TPS or the O2 sensors its driving me crazy it was running so good when the check engine light was on i really need to get this fixed thanks guys ,john:confused1
 
Ecomike said:
Contrary to popular opinion I have found Renix FSM references (1987) and a direct hot all the time battery wire to the Renix ECU that confirms that the Renix ECU does have some volatile (erasable by disconnecting the battery...) sensor memory storage. Turns out the TCU computer also has a pull the battery erasable memory as well!
Click to expand...

Well I'll be damned! Right under my very nose (from my '88 FSM).

COMPUTER RELEARN PROCEDURES
Vehicles equipped with engine or transmission computers may require a relearn procedure after vehicle battery is disconnected. Many vehicle computers memorize and store vehicle operation patterns for optimum driveability and performance. When vehicle battery is disconnected, this memory is lost. The computer will use default data until new data from each key start is stored. As computer memorizes vehicle operation for each new key start, driveability is restored. Vehicle computers may memorize vehicles operation patterns for 40 of more key starts.

Customers often complain of driveability problems during relearn stage because vehicle acts differently then before being serviced. Depending on type and make of vehicle and how it is equipped, the following complaints (driveability problems) may exist:
* Harsh Or Poor Shift Quality
* Rough Or Unstable Idle
* Hesitation Or Stumble
* Rich Or Lean Running
* Poor Fuel Mileage

These symptoms and complaints should disappear after a number of drive cycles have been memorized. To reduce the possibility of complaints, after any service which requires battery power to be disconnected, vehicle should be road tested. If a specific relearn procedure is not available, the following procedure may be used:

Automatic Transmission
* Set parking brake, start engine in "P" or "N" position. Warm-up vehicle to normal operating temperature or until cooling fan cycles.
* Allow vehicle to idle for one minute in "N" position. Select "D" and allow engine to idle for one minute.
* Accelerate at normal throttle position (20-50%) until vehicle shifts into top gear.
* Cruise at light to medium throttle.
* Decelerate to a stop, allowing vehicle to downshift, and use brakes normally.
* Process may be repeated as necessary.

Manual Transmission
* Place transmission in Neutral position.
* Ensure emergency brake has been set and all accessories are turned off.
* Start engine and bring to normal operating temperature.
* Allow vehicle to idle in Neutral for one minute.
* Initial relearn is complete: process will be completed during normal driving.

Some manufacturers identify a specific relearn procedure which will help establish suitable driveability during relearn stage. These procedures are especially important if vehicle is equipped with and electronically controlled automatic transmission or transaxle. Always complete procedure before returning vehicle to customer.
 
Saudade said:
Well I'll be damned! Right under my very nose (from my '88 FSM).

COMPUTER RELEARN PROCEDURES
Vehicles equipped with engine or transmission computers may require a relearn procedure after vehicle battery is disconnected. Many vehicle computers memorize and store vehicle operation patterns for optimum driveability and performance. When vehicle battery is disconnected, this memory is lost. The computer will use default data until new data from each key start is stored. As computer memorizes vehicle operation for each new key start, driveability is restored. Vehicle computers may memorize vehicles operation patterns for 40 of more key starts.

Customers often complain of driveability problems during relearn stage because vehicle acts differently then before being serviced. Depending on type and make of vehicle and how it is equipped, the following complaints (driveability problems) may exist:
* Harsh Or Poor Shift Quality
* Rough Or Unstable Idle
* Hesitation Or Stumble
* Rich Or Lean Running
* Poor Fuel Mileage

These symptoms and complaints should disappear after a number of drive cycles have been memorized. To reduce the possibility of complaints, after any service which requires battery power to be disconnected, vehicle should be road tested. If a specific relearn procedure is not available, the following procedure may be used:

Automatic Transmission
* Set parking brake, start engine in "P" or "N" position. Warm-up vehicle to normal operating temperature or until cooling fan cycles.
* Allow vehicle to idle for one minute in "N" position. Select "D" and allow engine to idle for one minute.
* Accelerate at normal throttle position (20-50%) until vehicle shifts into top gear.
* Cruise at light to medium throttle.
* Decelerate to a stop, allowing vehicle to downshift, and use brakes normally.
* Process may be repeated as necessary.

Manual Transmission
* Place transmission in Neutral position.
* Ensure emergency brake has been set and all accessories are turned off.
* Start engine and bring to normal operating temperature.
* Allow vehicle to idle in Neutral for one minute.
* Initial relearn is complete: process will be completed during normal driving.

Some manufacturers identify a specific relearn procedure which will help establish suitable driveability during relearn stage. These procedures are especially important if vehicle is equipped with and electronically controlled automatic transmission or transaxle. Always complete procedure before returning vehicle to customer.
Click to expand...

I tell you Ecomike is the bomb when Renix is involved in your Jeep!!!!
 
Saudade said:
Well I'll be damned! Right under my very nose (from my '88 FSM).

COMPUTER RELEARN PROCEDURES
Vehicles equipped with engine or transmission computers may require a relearn procedure after vehicle battery is disconnected. Many vehicle computers memorize and store vehicle operation patterns for optimum driveability and performance. When vehicle battery is disconnected, this memory is lost. The computer will use default data until new data from each key start is stored. As computer memorizes vehicle operation for each new key start, driveability is restored. Vehicle computers may memorize vehicles operation patterns for 40 of more key starts.

Customers often complain of driveability problems during relearn stage because vehicle acts differently then before being serviced. Depending on type and make of vehicle and how it is equipped, the following complaints (driveability problems) may exist:
* Harsh Or Poor Shift Quality
* Rough Or Unstable Idle
* Hesitation Or Stumble
* Rich Or Lean Running
* Poor Fuel Mileage

These symptoms and complaints should disappear after a number of drive cycles have been memorized. To reduce the possibility of complaints, after any service which requires battery power to be disconnected, vehicle should be road tested. If a specific relearn procedure is not available, the following procedure may be used:

Automatic Transmission
* Set parking brake, start engine in "P" or "N" position. Warm-up vehicle to normal operating temperature or until cooling fan cycles.
* Allow vehicle to idle for one minute in "N" position. Select "D" and allow engine to idle for one minute.
* Accelerate at normal throttle position (20-50%) until vehicle shifts into top gear.
* Cruise at light to medium throttle.
* Decelerate to a stop, allowing vehicle to downshift, and use brakes normally.
* Process may be repeated as necessary.

Manual Transmission
* Place transmission in Neutral position.
* Ensure emergency brake has been set and all accessories are turned off.
* Start engine and bring to normal operating temperature.
* Allow vehicle to idle in Neutral for one minute.
* Initial relearn is complete: process will be completed during normal driving.

Some manufacturers identify a specific relearn procedure which will help establish suitable driveability during relearn stage. These procedures are especially important if vehicle is equipped with and electronically controlled automatic transmission or transaxle. Always complete procedure before returning vehicle to customer.
Click to expand...
this explanes alot the check engine light is back on its running good and im going to go buy a code reader this morning to find out the problem thanks alot you guys i will keep you informed of what the problem was thanks again, john :yelclap:
 
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