Have mercy!

aboglesbee

New Member
Joined
Sep 15, 2009
Location
Fort Bragg, NC
Hello all:
I apologize in advance if this is posted in the incorrect forum.
I am having mechanical issues with my 94 Jeep Cherokee (6 cyl.) and am hoping to get some advice on what I should do. Here is the situation:
Whenever I attempt to start the jeep I have to punch the gas to get it going, but as soon as I let off the gas it dies. This situation has been going on for a while (difficulty getting started) but after it was running it would continue doing so.
My husband was messing around under the hood and told me that I needed to do a tune up, and I'm wondering if he knocked something loose while fooling around.
My friend who is an avid jeep enthusiast feels it is likely the air intake control (same friend who recommended I ask you all for advice). I have checked around under the hood to see if I could find any loose connections anywhere to no avail.
Any advice would be truly appreciated. I have another vehicle so am not completely stranded but would like to get this taken care of. It would be great if it was something I could do myself.
 
I know nothing of jeeps, but hard starting is a lot of times related to a bad coolant temperature sensor.

G/L
 
aboglesbee said:
Hello all:
I apologize in advance if this is posted in the incorrect forum.
I am having mechanical issues with my 94 Jeep Cherokee (6 cyl.) and am hoping to get some advice on what I should do. Here is the situation:
Whenever I attempt to start the jeep I have to punch the gas to get it going, but as soon as I let off the gas it dies. This situation has been going on for a while (difficulty getting started) but after it was running it would continue doing so.
My husband was messing around under the hood and told me that I needed to do a tune up, and I'm wondering if he knocked something loose while fooling around.
My friend who is an avid jeep enthusiast feels it is likely the air intake control (same friend who recommended I ask you all for advice). I have checked around under the hood to see if I could find any loose connections anywhere to no avail.
Any advice would be truly appreciated. I have another vehicle so am not completely stranded but would like to get this taken care of. It would be great if it was something I could do myself.
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Your friend may be right, but it is called an Idle Air Control Valve. I believe it works with the PCM to adjust air/fuel intake depending on the needs of the engine when its cold or warm. Kinda like a choke on a carburetor. They are easy to replace but I think they cost in the 30-50 dollar range. thats my 2cents. Good luck
 
Could be a TPS (Throttle position sensor). Is the check engine light on?
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was gonna say. Had a sim prob with my yj and turned out to be the culprit.

How to test

TESTING PROCEDURE 1991 – 2001 4.0L H.O. engines

1. Near the rear of intake manifold, disconnect sensor pigtail harness connector from main wiring harness.
2. Place an ohmmeter across terminals B and C (SEE Image). Ohmmeter should be set to 1K-to-1OK scale for this test.
3. The meter reading should be open (infinite resistance). Replace sensor if a low resistance is indicated.

TESTING PROCECURE for 1987 – 1990 4.0 L engines

Test # 1

Get a volt/ohm meter and set it to read 0 - 500 ohms. Unplug the CPS and measure across the CPS connector's A & B leads. Your meter should show a CPS resistance of between 125 - 275 ohms. If the CPS is out of that range by much, replace it.


Test # 2

You'll need a helper for this one. Set the volt/ohm meter to read 0 - 5 AC volts or the closest AC Volts scale your meter has to this range. Measure across the CPS leads for voltage generated as your helper cranks the engine. (The engine can't fire up without the CPS connected but watch for moving parts just the same!) The meter should show .5 - .8 VAC when cranking. (That's between 1/2 and 1 volt AC.) If it's below .5vac, replace it
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