kq.echo.413 Posted January 4, 2014 Share Posted January 4, 2014 I'm volt testing my tps sensor wire a is at 4.89 wire c is at .71 after dividing them I arrive at .14...the desired ratio I think is .17 am I close enough or shall I adjust the tps Link to comment Share on other sites More sharing options...
cruiser54 Posted January 4, 2014 Share Posted January 4, 2014 Click on the link in my signature and find the TPS instructions. Or, click on this: http://www.cherokeeforum.com/f51/cruiser54s-mostly-renix-tips-153657/ Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 4, 2014 Author Share Posted January 4, 2014 Thanks cruiser ..glad to see you came back..I just down loaded and printed your write up..great stuff bro.. Link to comment Share on other sites More sharing options...
Jeep Driver Posted January 4, 2014 Share Posted January 4, 2014 Couple of weeks ago I had Oreilly warranty another TPS for me, I swapped in the parking lot on my way to a job, I just guessed at it's position. My truck is running so damn perfect right now I don't dare to adjust anything to spec. :P Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 5, 2014 Author Share Posted January 5, 2014 Hmmmm may be I should adapt your theory ..close eyes and tighten screws lol..I'm getting ither a high smooth idle or a rough rich low idle no matter how I crunch the numbers Link to comment Share on other sites More sharing options...
cruiser54 Posted January 5, 2014 Share Posted January 5, 2014 Thanks cruiser ..glad to see you came back..I just down loaded and printed your write up..great stuff bro.. Be sure to do the sensor ground test!! Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 5, 2014 Author Share Posted January 5, 2014 I did the ground test..on my a pin its 4.90 on the c pin I adjusted it to .88..that got me very close to my 17 overall goal..however it still runs verrrry rich Link to comment Share on other sites More sharing options...
cruiser54 Posted January 5, 2014 Share Posted January 5, 2014 TPS won't cause "very rich" running. Clarify please. Did you do the Sensor Ground Test? Wiggle the harness etc? What were the ohms readings? MAP sensor can cause extremely rich running if the tube from the throttle body to the MAP sensor is cracked, melted, loose etc. Same thing can be caused by a poor connecor fit at the MAP. Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 5, 2014 Author Share Posted January 5, 2014 I did not ohm test it ..I only volt tested and adjusted ..however after reading what you just wrote I went and inspected the vacum tube from map sensor..there is a small melted spot directly above the engine ground that I did replace ..I will get that vacuum hose replaced and hope that works..I will do a ground test before I even attempt to refire.. Thank you for the wisdom Link to comment Share on other sites More sharing options...
cruiser54 Posted January 5, 2014 Share Posted January 5, 2014 Cruiser’s Renix Sensor Ground Test This sensor ground circuit affects the CTS, TPS, IAT, MAP, ECU and diagnostic connector grounds. It’s very important and not something to overlook in diagnosing your Renix Jeep as it is common for the harnesses to have poor crimps causing poor grounds. If any or all of the sensors do not have a good ground, the signal the ECU receives from these sensors is inaccurate. Set your meter to measure Ohms. Be sure the key is in the OFF position. Using the positive (red) lead of your ohmmeter, probe the B terminal of the flat 3 wire connector of the TPS . The letters are embossed on the connector itself. Touch the black lead of your meter to the negative battery post. Wiggle the wiring harness where it runs parallel to the valve cover and also near the MAP sensor mounted on the firewall. If you have an 87 or 88 with the C101 connector mounted on the firewall above the brake booster, wiggle it, too. You want to see as close to 0 ohms of resistance as possible. And when wiggling the harnesses/connectors the resistance value should stay low. If there is a variance in the values when wiggling the wires, you have a poor crimp/connection in the wiring harness or a poor ground at the engine dipstick tube stud. On 87 and 88 models, you could have a poor connection at the C101 connector as well. Revised 06/12/2012 Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 5, 2014 Author Share Posted January 5, 2014 Ok so I just completed the ground check..The system shows a stable 00.6 even while wiggiling the harness next to the valve cover. The truck is a 89 so theres no c101. i am going to check map censor and replace the slightly deformed vacum hose..Thank you for the help I'm new to renix and I must say it is a odd kind of nightmare :wall: Link to comment Share on other sites More sharing options...
cruiser54 Posted January 5, 2014 Share Posted January 5, 2014 It will be running like a "dream" in the near future. I would do the complete ground and connector refreshing as a matter of course if not already done. Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 6, 2014 Author Share Posted January 6, 2014 ok all renix reground and ohm testing complete ...The truck runs very smooth with a small variation in idle..How much effect will a hole in muffler effect the overall run of the engine...The reason I ask is while standing in front of the truck it sounds amazing but if you go to the rear and listen to exhaust ryhthm there is seemingly a miss Link to comment Share on other sites More sharing options...
Jeep Driver Posted January 6, 2014 Share Posted January 6, 2014 ok all renix reground and ohm testing complete ...The truck runs very smooth with a small variation in idle..How much effect will a hole in muffler effect the overall run of the engine...The reason I ask is while standing in front of the truck it sounds amazing but if you go to the rear and listen to exhaust ryhthm there is seemingly a miss Is the variation in idle a rhythmic up and down by 2-300 rpm? If so, replace your TPS. Link to comment Share on other sites More sharing options...
Jeep Driver Posted January 6, 2014 Share Posted January 6, 2014 Have you got an old POS cat? Have you changed your O2 sensor yet? IAT sensor? No, I don't think the hole in the muffler will make a difference. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 6, 2014 Share Posted January 6, 2014 ok all renix reground and ohm testing complete ...The truck runs very smooth with a small variation in idle..How much effect will a hole in muffler effect the overall run of the engine...The reason I ask is while standing in front of the truck it sounds amazing but if you go to the rear and listen to exhaust ryhthm there is seemingly a miss Try resetting your TPS now that the grounds are good. And no, the muffler won't CAUSE a miss. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 6, 2014 Share Posted January 6, 2014 Have you got an old POS cat? Have you changed your O2 sensor yet? IAT sensor? No, I don't think the hole in the muffler will make a difference. O2 sensor is a real possibility. Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 6, 2014 Author Share Posted January 6, 2014 I am ordering new cat, o2,map censor and replacing muffler..The tps still had consistant voltage and held it thru the opening and closing of the throttle range..So as soon as my parts show up i will install and give an update...Thank you guys for all the important info Not to sound to new to renix ..but what is a IAT censor? Link to comment Share on other sites More sharing options...
Jeep Driver Posted January 6, 2014 Share Posted January 6, 2014 Intake air temp sensor. Do you live in an area where you have your truck inspected? Mine loves being cat free. Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 6, 2014 Author Share Posted January 6, 2014 I live in walton co ga ..I do not need emissions so there for I guess out goes the cat..Once again thanks for the info it is very welcome in my little lab aka my garage Link to comment Share on other sites More sharing options...
cruiser54 Posted January 6, 2014 Share Posted January 6, 2014 I am ordering new cat, o2,map censor and replacing muffler..The tps still had consistant voltage and held it thru the opening and closing of the throttle range..So as soon as my parts show up i will install and give an update...Thank you guys for all the important info Not to sound to new to renix ..but what is a IAT censor? Intake Air Temp sensor. It can be removed and cleaned. Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 7, 2014 Author Share Posted January 7, 2014 Well thanks again that solved the high low idle ..you guys are awesome with the knowledge..I simply cleaned and reinstalled the IAT ... Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 7, 2014 Author Share Posted January 7, 2014 Link to comment Share on other sites More sharing options...
kq.echo.413 Posted January 7, 2014 Author Share Posted January 7, 2014 That is the truck you guys have helped me get going correctly..I will start a build thread now since the power plant it stabilized ...she is a 89 4.0 I only paid $650 for her.. Link to comment Share on other sites More sharing options...
Keyav8r Posted January 7, 2014 Share Posted January 7, 2014 Glad I read through this thread. My 88 has an idle that varies slightly even when warmed up. Now if In can just find the IAT I'll clean that sucker! Link to comment Share on other sites More sharing options...
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