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Old 06-30-2012, 03:00 PM   #61
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The NAPA sensors aren't Mopar but I haven't had an issue with any of the other sensors I've picked up from them. I noticed a difference after I replaced my TPS but the IAC and MAP were also part of the fix. I wasn't throwing any codes though before hand though. I was getting a surge which turned out to be the butterfly sticking. Did you disconnect the battery for at least 5 min. after replacing the sensor?

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Old 06-30-2012, 05:06 PM   #62
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I did not disco the battery.

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Old 06-30-2012, 05:26 PM   #63
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I'm thinking maybe something got hooked up wrong after the motor swap. Anyone have a wiring diagram of the whole area or know how I could check to see if it's hooked up right?
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Old 07-01-2012, 11:06 PM   #64
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I just changed my TPS a few weeks ago, and had a bunch of problems. What I ended up doing was disconnecting the negative battery terminal for around 30 minutes. This resets the "learned adaptive codes" in the computer. After that mine has run like a top since.
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Old 07-02-2012, 08:16 AM   #65
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Check all the grounds are clean and tight. Check all vacuum lines are connected and no leaks. Both common problems after an engine swap.
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Old 07-02-2012, 07:16 PM   #66
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You didn't say what year it was, but the air bag clock spring if it has one will also cause a tps voltage high signal, they seem to have a common wire between them. So many of them go bad the dealer usually has them on back order.
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Old 07-03-2012, 09:18 AM   #67
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Quote:
Originally Posted by Hillbilly1
You didn't say what year it was, but the air bag clock spring if it has one will also cause a tps voltage high signal, they seem to have a common wire between them. So many of them go bad the dealer usually has them on back order.
99. How do I go about checking the airbag clock spring?
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Old 07-03-2012, 05:20 PM   #68
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Are you still not running?? I see you tried the TPS 3 times... Did you check the Crankshaft Sensor??
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Old 07-03-2012, 07:18 PM   #69
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Are you still not running?? I see you tried the TPS 3 times... Did you check the Crankshaft Sensor??
I've been running but it is still chugging. Where is the crankshaft sensor?
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Old 07-03-2012, 07:39 PM   #70
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I've been running but it is still chugging. Where is the crankshaft sensor?
Crawl under the drivers side door and look up. The crankshaft sensor is right in the middle of this picture I posted. It has a butterfly plate that has two screws that atach it to the bell housing.
Don't.. I repeat don't buy any crap off of ebay unless it is Factory/ Mopar.
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Old 07-03-2012, 09:48 PM   #71
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99. How do I go about checking the airbag clock spring?
Mine is a 97, so I don't think yours would be much different, I can't remember for sure, but if I remember correctly, you disconnect the battery for at least 20-30 minutes to allow the reserve charge to dissipate from the air bag controls, then unplug the connector under the dash, connect everything back up except that connector and drive it a while, if the problem goes away, then you have found the problem. Search this site for "Air bag clock spring" and you should find directions on how to do it. Keep in mind while that connector is disconnected, the air bag will not work. Mine was pretty nasty when I took it out, apparently the previous owner had dogs, so there was a lot dog hair in it. Water damage is common too if you have left the top off and got caught in a rain.
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Old 07-04-2012, 10:02 AM   #72
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Quote:
Originally Posted by Fitzey5435
Crawl under the drivers side door and look up. The crankshaft sensor is right in the middle of this picture I posted. It has a butterfly plate that has two screws that atach it to the bell housing.
Don't.. I repeat don't buy any crap off of ebay unless it is Factory/ Mopar.
Is there a way to tell if it's bad? I don't wanna buy one and it not be the problem.
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Old 07-04-2012, 10:24 AM   #73
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I don't get how all these other things could cause this. It keeps throwing the same code which is tps high voltage. You guys really think something else could throw this code besides the tps?
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Old 07-04-2012, 11:46 AM   #74
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While checking a few things on my Heep I noticed that the previous owner was nice enough to break off one of the two screws in the TPS. While I have been having slight problems with acceleration, I did not see any play when manually adjusting the throttle. I guess I'm gonna buy a new throttle body and TPS now. Ugh

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Old 07-04-2012, 11:47 AM   #75
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I don't get how all these other things could cause this. It keeps throwing the same code which is tps high voltage. You guys really think something else could throw this code besides the tps?
My code reader gives the most common causes of the code, and it indicates that the clock spring in the steering wheel is the most common cause, even though mine was in pretty bad shape it ended up being the TPS, the previous owner had changed it also, and they used red Loctite on the screws! Had to cut the heads off the screws to get the sensor off. From what I have read, both use a common sensor wire which fools the computer if one goes bad. The clock spring can be disconnected to verify its the culprit before you have to plop down $80 for a new one.
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Old 07-04-2012, 11:51 AM   #76
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might try removing it,grinding it down and then extracting it first.i just looked at the price of throttle bodies.hehe
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Old 07-05-2012, 04:14 PM   #77
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So I am going to try replacing the tps for the fourth time (2nd mopar replacement) hopefully this works because if it doesn't I'm bout to just take it to the dealer. I'm tired messing with it
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Old 07-05-2012, 04:34 PM   #78
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So I am going to try replacing the tps for the fourth time (2nd mopar replacement) hopefully this works because if it doesn't I'm bout to just take it to the dealer. I'm tired messing with it
I seriously doubt you had 4 bad sensors in a row, and if you don't want to try the clock spring disconnect thing, which cost you nothing but your time, you do need to take it to a dealer. TPS sensors are a simple balanced variable resistor, not much to go wrong with them other than mechanical failure due to water intrusion or wear and tear on the operating mechanism. Your problem is elsewhere.
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Old 07-05-2012, 10:24 PM   #79
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So what exactly do i unplug under the dash to check this clock spring? I just dont see how a clock spring could cause the symptoms that my jeep is having. It is chugging and feels like its not getting fuel sometimes.
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Old 07-05-2012, 10:58 PM   #80
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Remove the plastic around the steering column. On the bottom of the column just behind the steering wheel you'll see two plugs. One is for the airbag the other is for the horn and cruise control if you have it. Be careful and don't break the plastic clips on the plugs when you disconnect them,
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Old 07-05-2012, 11:13 PM   #81
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Quote:
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So I am going to try replacing the tps for the fourth time (2nd mopar replacement) hopefully this works because if it doesn't I'm bout to just take it to the dealer. I'm tired messing with it
A good scan tool like OTC or snap on will show if the tps is working right. Put the tps in the graph mode, then slowly press the throttle to the floor. The line on the graph should go up with a nice, steady line. Any consistent glitch would indicate a bad spot in the tps.
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Old 07-06-2012, 04:02 PM   #82
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Remove the plastic around the steering column. On the bottom of the column just behind the steering wheel you'll see two plugs. One is for the airbag the other is for the horn and cruise control if you have it. Be careful and don't break the plastic clips on the plugs when you disconnect them,
There are like 1,639,839 plugs. Which two are you talking about?
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Old 07-06-2012, 04:25 PM   #83
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Ok so in unplugged the air bag plug and still having the same symptoms.
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Old 07-07-2012, 10:27 AM   #84
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The NAPA sensors aren't Mopar but I haven't had an issue with any of the other sensors I've picked up from them. I noticed a difference after I replaced my TPS but the IAC and MAP were also part of the fix. I wasn't throwing any codes though before hand though. I was getting a surge which turned out to be the butterfly sticking. Did you disconnect the battery for at least 5 min. after replacing the sensor?
was it sticking mechanically or electrically?
how can you figure that out...and how can you fix? i believe mine is sticking as well
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Old 07-07-2012, 11:33 AM   #85
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Replaced it for a fourth time. Still same problem. The dealer gave me a tps that had some of the teeth that holds the ring on missing. They tried to tell me it comes like that. I compared it to the one I was taking back (under warranty) and tried to tell them they were wrong. I'll take a picture of it when I pull it out and replace it again. It was the only one they had left and it also is under warranty. I dont think the teeth missing had anything to do with its performance but it's just ridiculous that band new out of the box mopar is already broken. Next thing in gonna is check the voltage coming out of the plug.
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Old 07-07-2012, 12:15 PM   #86
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I just removed the cps and cleaned it (it was gross) is there a way I can clean the part of the bell housing where the cps sits in it? I have a feeling that s dirty too. In the picture below I got 1.53 vdc from the middle wire and 1.03 vdc from the right wire. I used the left wire as the ground and had the jeep off and plug undone durning these measurements. I am about to re gap the spark plugs, .035 for a 99 4.0 correct?
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Old 07-07-2012, 12:39 PM   #87
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Do my plugs look okay? They are autolite brand.
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Old 07-07-2012, 01:18 PM   #88
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Jeep is running a lot better after all that. Thanks for the advice guys. I'm not 100% sure the problem is fixed. I think I had one or two "chugs." not sure if it was me driving or just still the same symptoms. Also I can't get the check engine light to go away which leads me to believe I haven't fixed the problem. I should be able to hold the positive cable to the negative terminal for 30 secs, reconnect the positive cable. turn key on turn headlights on then turn headlights off turn key off right? It is about 1,247,064 degrees outside so I am gonna take a break and get in the pool. Next step is to put original tps back in. I will keep you guys updated. Thanks for all the help and please keep it coming. (sorry about the 847,946 posts in a row)
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Old 07-07-2012, 01:20 PM   #89
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I just removed the cps and cleaned it (it was gross) is there a way I can clean the part of the bell housing where the cps sits in it? I have a feeling that s dirty too. In the picture below I got 1.53 vdc from the middle wire and 1.03 vdc from the right wire. I used the left wire as the ground and had the jeep off and plug undone durning these measurements. I am about to re gap the spark plugs, .035 for a 99 4.0 correct?
Here is the picture that didn't attach TW first time.
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Old 07-07-2012, 06:24 PM   #90
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The electrode on the top plug in the picture with 3 plugs looks like its off center. Can you straighten it out or replace them ?

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