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Jeep Wrangler TPS Problem

5 messages,  Last post on Nov 09, 2009 at 8:37 AM

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#1 of 5 98 Wrangler 4 Cyl. TPS Issue by bezzer344 Jun 03, 2009 (1:14 pm)
Hi,   So after giving my Jeep a tune-up, and a new water pump, i noticed that when driving it at a certain point in the throttle it would sputter and buck, if you if will, but would stop both sputtering and bucking if I either let off the throttle or gassed it a bit more. So it was then hooked up to a computer to see what the problem was and it turns out that the TPS was the problem. So I went to a local parts store(NAPA) and got a TPS, installed it, and when I started the jeep the rpms went went up to about 2100 rpms and idled there. Thinking/hoping that the problem might be because it was not an authentic mopar part, I went and got a TPS from a dealer and still it does the same thing: starts and goes up to 2100 rpms and idles...   Any ideas as to what the problem may be???   Thanks, Dave Replies to this message: mac24 (Jun 04, 2009 3:51 am) huskycountry (Nov 06, 2009 7:57 pm) roadburner (Nov 06, 2009 9:10 pm) and 1 more...
#2 of 5 Re: 98 Wrangler 4 Cyl. TPS Issue [bezzer344] by mac24 Jun 04, 2009 (3:51 am)
Replying to: bezzer344 (Jun 03, 2009 1:14 pm) As this started after you did the 'tune up' it migh be worthwhile to go back and check over your work. Most likely cause is a disconnected or split vacuum hose. You can also do a basic rest of the PCM by disconnecting the battery for ten minutes.   It's also possible you have a problem with the IAC (Idle Air Control) motor, or the inlet passage to it. You may even find a cleaning of the throttle body and the IAC passage will do the trick.     Replies to this message: huskycountry (Nov 06, 2009 7:57 pm) roadburner (Nov 06, 2009 9:10 pm) erickpl (Nov 09, 2009 8:37 am)
#3 of 5 Re: 98 Wrangler 4 Cyl. TPS Issue [mac24] by huskycountry Nov 06, 2009 (7:57 pm)
Replying to: mac24 (Jun 04, 2009 3:51 am) I see you mention a PCM on this post. I just had my 07 Sahara in the shop and that is what they said they replaced, my OBD light was on that is why I took it in. When I picked up my car the techs and advisor were all gone, Can you tell me what excatly a PCM is and what it does in plain english so a girl can understand it? Replies to this message: roadburner (Nov 06, 2009 9:10 pm) erickpl (Nov 09, 2009 8:37 am)
#4 of 5 Re: 98 Wrangler 4 Cyl. TPS Issue [huskycountry] by roadburner Nov 06, 2009 (9:10 pm)
Replying to: huskycountry (Nov 06, 2009 7:57 pm) PCM= Powertrain Control Module- it's the computer that operates the engine and-if fitted-the automatic transmission. Replies to this message: erickpl (Nov 09, 2009 8:37 am)
#5 of 5 Re: 98 Wrangler 4 Cyl. TPS Issue [roadburner] by erickpl Nov 09, 2009 (8:37 am)
Replying to: roadburner (Nov 06, 2009 9:10 pm) And I believe it is warrantied up to about 80,000 miles since it is considered part of the emissions systems.   -Paul

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