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  #13  
Old 10-06-2016, 11:56 AM
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Re: no throttle response

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Originally Posted by Jstarii View Post
I tried the ignition switch test and all of the lights stay on. I did this before I left to work and after I got to work. All lights stayed on.

What was interesting on the ride in was that after idling at a stoplight when I accelerated the car fell on its face. I had to feather the gas pedal to keep accelerating. Albeit slowly. It behaved like a carborated engine. Once above 1500 rpm I was able to run normally. Even at reduced rpms.
Still no codes. I'm gonna to try disconnecting the O2 sensor tonight on my way home

Thanks for the help.
You really should invest in a scanner... the smart phone ones seem to be the best for usability. You may be about to spend way more money in tow fees or replacements than a semi-pro scanner would cost.

By any chance are you in California, or have changed gas brand lately?
Have you pulled the top off and looked into the throttle body to see if it looks like the john after a frat party?

I'd definitely check the fuel pump pressure if you aren't seeing obvious problems with the O2 sensors. However, you can probably save bucks by hooking up a smart phone app to a bluetooth scan dongle here.

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  #14  
Old 10-06-2016, 12:20 PM
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Re: no throttle response

Oh Sorry, Advanced Auto and Orielly's do not lend scanning tools. I can get the fuel pump pressure gauge but not the scanner.
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  #15  
Old 10-06-2016, 12:25 PM
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Re: no throttle response

I am in SC, waiting for a hurricane. . I just filled up at Costco, where I usually fill up but added 2/3 can of seafoam just in case something might get cleaned out. I put in new spark plugs on Monday, after this started, because the code was rich so I figured that I would see a lot of black on the plugs. All of the plugs were the same, tan around 3/4 of the tip and a black streak down one side. Looked odd but around the electrode, it looked good. Anyway, there are new plugs in her also.
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  #16  
Old 10-06-2016, 01:25 PM
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Re: no throttle response

I went looking at smart phone scanners and the Bluedriver looked nice. It does everything a more expensive stand alone scanner does but it's only $100. Seems like a good investment. Just need to make sure that it works on most cars. One of these scanners only worked on GM and Ford and another was good on American but not Asian or European cars.
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  #17  
Old 10-06-2016, 06:22 PM
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Re: no throttle response

Man, what a trip home! I started my trip home from work and stopped at the grocery store. By the time I got there a code was thrown and it was P0172. went into the store and came out about an hour later, started the car and no reverse. when put into reverse it made a grinding sound as though tryingvto engage the parking pawl while moving However, I wasn't moving.

Drive worked so I pulled forward and out. About 3 miles down the road the grinding sound was back so I put it into neutral and no sound. Back into drive no sound. 45 seconds layer it was back and into neutral again. this happen for aboit 3-4 miles. Also, I needed to put the car into neutral when i slowed to less than 15 mph.

By the time I got to the expressway the grinding stopped but the sralling was still present. Manually shifting helped keep the revs up.

almost home and the alarm chimes sounded 3 or 4 times about 1 minute between sounds.

At home another code was up and it was P0108. still no reverse but not the grinding.

This is getting more and more odd.

Any thoughts?
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  #18  
Old 10-06-2016, 07:19 PM
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Re: no throttle response

Was this with the O2 sensors disconnected? (the upstream ones, closest to the exhaust manifold.)
You donīt have a smart phone? Because the dongle only costs around USD 15 or less and the Torque app is free.


---------- Post added at 09:19 PM ---------- Previous post was at 09:15 PM ----------

And by the way, the P0108 code is for the MAP sensor. That is the #1 for the fuel injection, so could well be your problem. With a scanner you can check the MAP with ignition in on, but the engine off. The MAP should be more or less equal to the local barometric pressure.
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  #19  
Old 10-06-2016, 08:17 PM
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Re: no throttle response

No I did not disconnect the O2 sensor I didn't have anything at work to tie the wires back away from the exhaust.

What is the bane of the scanner dongle you are referring too? The cheapest I Finns was the blue driver.

Would the MAP sensor have such a large effect on the transmission?

Thanks for your support.
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  #20  
Old 10-06-2016, 09:08 PM
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Re: no throttle response

Hey J
Good grief!
We 'feel' your frustration!

We just have to find a way to get you going--that hurricane Matthew is really worrying the folks at the Nat Hurricane Ctr- family just flew out of Miami after holiday. After all the 'experiences' you've suffered, I think that the PCM is suspect. The pinging you had ( wrong timing) the stalling after warm-up, loss of power, backfiring, the multiple codes, etc even the transmission issues can be linked to a faulty PCM.
If you chase the problem w/PCM w/ older Jeeps, it's not uncommon for them to produce symptoms just like yours. The following vid has small diagnostic ( wiggle test) and 'Hail Mary' field fix of shortening the PCM torx mount screws ( or backing them out some), but I think your issue is likely here (PCM) and you 'may' be able to get safely inland.
Bonne Chance!



Last, you might also chase the vids that show how to re-inforce the solder on the PCM connections if the 'wiggle test' is pos. I had a nasty stopped wiper problem on a Suburban once that required some solder 're-do' on its circuit board. Note no solder needed to be introduced but just re-heating the important soldered areas near the connections--was a breeze once I worked out what needed to be done. A proper diagnostic by your local Jeep enthusiast's garage is in order. They've likely 'seen' everything before and can help get you back on the trail.
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  #21  
Old 10-06-2016, 09:35 PM
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Re: no throttle response

You can find them on e-bay, just type ELM 327 OBD dongle. Maybe you can also buy them locally, but i donīt know that.
Reverse on the 42RE is selected manually via the shift cable to the manual valve. When the park sprag sticks, it will prevent to drive in reverse. No idea however if there is any connection with the other problem you have.
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  #22  
Old 10-12-2016, 03:21 AM
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Re: no throttle response

Hey J
Down So Carolina way.
Just checking in to see how you doing?
Hope all well and that you got to higher ground.
ATB
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  #23  
Old 10-12-2016, 08:57 AM
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Re: no throttle response

Hi,
We didn't get much rain in the upstate. The coast took the hit.
I ordered a ELM327 dongle to test the engine. I expect it to arrive today. So not to get the app and see how the data looks.

I did find some references on the transmission and both indicated that if reverse goes out, the transmission needs to be rebuilt. There is a snap ring that tends to fail and cause reverse to stop working.

All I'm looking to do now is get the engine running correctly and then decide if I want to put in a junk yard transmission or try to sell her.

Thanks for your help.
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