Topic: Idle Issue

[jetcracker82]

No EGR on a 95.

New fangled Hippy Jeeps with there codes and such, LOL 

[Desert Bob]

Well I dropped the Jeep off at my local shop that I trust and has done work for me in the past.  The did a thorough check of the jeep and could find nothing wrong.  He just smiled and saild I should have bought the six if I wanted a smooth running engine.  I am going to keep working on it as I think it can run better.  I will keep everyone posted on my journey and time will tell.

[Jesse-James]

The shops answer to a idle problem was you have the wrong engine?
I don't think I would ever go back to that shop.

[Desert Bob]

The shops answer to a idle problem was you have the wrong engine?
I don't think I would ever go back to that shop.

Agreed.  At least it didn't cost me anything.

[Desert Bob]

See below

[Desert Bob]

UPDATE:  Bought a Distributor off of EBay as mine seemed to have way too much play.  Got it complete and shipped for $15.  Good deal and it was in excellent shape.  Installed it Saturday and it runs much better but still has the idle issue.  The Jeep also runs quieter as well with much less ticking.

Then I replaced the O2 sensor because most likely it had never been changed as well.  Still has the idle issue.

I have ordered a new IAC and TPS so if these don't do the trick what next?

[Desert Bob]

Put in the new IAC and TPS and still idles rough.  It seems to run smoother and start better but still shakes at 600rpms.  So far this is what I have done:

New Plugs - Champion 4412 Gap .035
New Cap and Rotor - Goods ones with Brass connectors
New Plug Wires
New O2 Sensor
New Throttle Position Sensor
New Idle Air Control Valve
New Lifters
Cleaned the Throttle Body
Replaced all (and I mean all) vacuum lines
Replaced Distributor and Cam Position Sensor
Good compression (155-165psi)
Clean Air Filter
New Fuel Filter
Ran Sea Foam through the Engine and Fuel System

I still have a tick that I thought the lifters would fix.  Maybe the cam is worn? Any other ideas?

Thanks.

[Desert Bob]

I replaced the Power Steering Pressure Switch this weekend and still no luck.  The Jeep idles at 500-600rpm when the miss starts.  With the engine cold it idles really smooth at about 700rpm (IAS must be wokring)  Is there someway to trouble shoot an ECM?  Would a bad CPS cause a low/miss at idle?  Or do they just fail outright.

Thanks.

[garydubf]

Put in the new IAC and TPS and still idles rough.  It seems to run smoother and start better but still shakes at 600rpms.  So far this is what I have done:

New Plugs - Champion 4412 Gap .035
New Cap and Rotor - Goods ones with Brass connectors
New Plug Wires
New O2 Sensor
New Throttle Position Sensor
New Idle Air Control Valve
New Lifters
Cleaned the Throttle Body
Replaced all (and I mean all) vacuum lines
Replaced Distributor and Cam Position Sensor
Good compression (155-165psi)
Clean Air Filter
New Fuel Filter
Ran Sea Foam through the Engine and Fuel System

I still have a tick that I thought the lifters would fix.  Maybe the cam is worn? Any other ideas?

Thanks.

Have you tested the coil output?

[Desert Bob]

Would the output be different at idle?  I would have thought it would be the same voltage regardless of RPM?  The Jeep runs very well it just idles poorly.

[garydubf]

I can't say for sure but I replaced the coil on my TJ and she fires right up and runs smooth.  Had a little rough idle and hard start before.

[Sidscan]

I can't say for sure but I replaced the coil on my TJ and she fires right up and runs smooth.  Had a little rough idle and hard start before.

Mine got better when I replace everything with the performance firepower package.  New coil was part of the package.  Everything works especially well when I turn the key and let the fuel pump prime before I start it.  The oil guage doesn't go goofy either if I give it time to prime.  I just wait a second until I hear the fuel pump stop.  The other thing I did was pitch the CAI and put the stock one back on this made a difference in my opinion. 

[garydubf]

I still have a tick that I thought the lifters would fix.  Maybe the cam is worn? Any other ideas?

Thanks.

Could the "tick" be an exhaust leak, caused by a cracked manifold? 

[Desert Bob]

I still have a tick that I thought the lifters would fix.  Maybe the cam is worn? Any other ideas?

Thanks.

Could the "tick" be an exhaust leak, caused by a cracked manifold? 

I just replaced the broken Exhaust Stud and the Manifold was fine. Ticked the same before and after.

Thanks.

[Desert Bob]

I can't say for sure but I replaced the coil on my TJ and she fires right up and runs smooth.  Had a little rough idle and hard start before.

Mine got better when I replace everything with the performance firepower package.  New coil was part of the package.  Everything works especially well when I turn the key and let the fuel pump prime before I start it.  The oil guage doesn't go goofy either if I give it time to prime.  I just wait a second until I hear the fuel pump stop.  The other thing I did was pitch the CAI and put the stock one back on this made a difference in my opinion. 

Would the Accel Coil work with new plug wires?  Hate to throw away what I just bought.