E30 tps symptoms Check Jun 6, 2017 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm I am in the middle of troubleshooting idle concerns and decided to buy an new throttle position sensor. Bogging at high revs (where wide-open throttle WOT switch is not engaged). The throttle position sensor is working closed circuit with no throttle and when I unplug the ICV the idle shoots up. E30 question 1986 325e - hi everyone, so need some input. 1 to 1. Erratic idle (if throttle position switch TPS is not engaged). Aug 30, 2012 · Blue temp sensor - pin#13 and ground, should read ~300-360ohms when at operating temp, ~3000ohms when cold - CHECK TPS - closed pin#2 and ground, WOT pin#3 and ground, both should read continuity (0 ohms) when active - CHECK The TPS on most E30 engines consists of two switches, so again, the symptoms can vary, depending on which switch (or both) has failed, and depending on which state they have failed in. co. Think of it as teaching your truck’s brain to recognize the throttle’s full range of motion again. Hunting / pulsing revs. Check Mar 8, 2007 · The ECU used in an E30 would not know what to do with a variable throttle position sensor. My car will surge at random and hang at 1800 rpm until I hit the gas. Hearing a click doesn't mean the TPS is working. Brianmoooore E30 Zone Team Member Posts: 49353 Video tutorial on how to test/troubleshoot and setup the throttle position sensor on a BMW. In this guide, we cover the bad throttle position sensor symptoms, so you can watch for signs of failure. If you can't hear that click then you need to remove the throttle body from the intake manifold, turn it upside down, and loosen the two screws Jul 5, 2009 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Jun 15, 2014 · connector, there's a problem with the TPS, or the DME (or Idle Control Module (ICM) on an ETA car) is faulty. I bought the car a few years ago and have been back and forth trying to figure it out but just get busy. But before that, we need to know how does the throttle position sensor work. The symptom will appear when the car was move and the engine suddenly shutdown. Crankcase oil can migrate down the throttle body shaft bearings and into the TPS, leading some to recommend drilling a hole in Mar 10, 2023 · Lack of acceleration power, a rough or sluggish idle, stalling, difficulty shifting into higher gears, and the illumination of the Check Engine Light are all common signs of a bad throttle position sensor. The idle only rarely goes back down to 900 after idling a long time. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Feb 26, 2025 · I threw an m30b35 into my e30 and have one little problem I can't seem to diagnose. The most common thing to happen on the TPS fitted to most E30s is that the idle switch fails in the 'off idle' state, and this will lead to a poor quality idle. 20mm and 0. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm E30 Zone Addict Posts: 3131 Joined: Mon May 22, 2006 10:00 pm Location: Kent. This must have gotten stuck while performing the self test when you turned the key on. Symptoms of a Defective Throttle Position Sensor May 23, 2025 · The Throttle Position Sensor (TPS) monitors the operation of the throttle valve. Rough idle symptoms, including erratic engine behavior, can indicate throttle issues that may require cleaning or repairs. The throttle position sensor (TPS) tells your engine computer exactly where your accelerator pedal sits. I,ve swapped with a used icv , no different , the ohm reading on both icv is 8 ohm. 60mm: Failure Methods: It is commonly stated online that E30 TPS failures are caused by oil saturation. You may have to register before you can post: click the register link above to proceed. Symptoms of Idle Problems. Mar 24, 2012 · Malfunctioning of a TPS can result in improper data being fed to the car's computer, which monitors engine performance, in respect to the fuel efficiency of the car. I posted a link to an article about TPS failing symptoms etc. My 1984 318i has been running with high 1. New filter had no effect. The symptoms are at about 1500 rpm-2000 the car kangaroos especially when you roll off the thottle from 50,60 mph approx,and when you blip the thottle it fills like its misfiring on one cylinder and then the revs drop right down and it nearly stals but the revs pic up to 1500,also driving May 19, 2014 · connector, there's a problem with the TPS, or the DME (or Idle Control Module (ICM) on an ETA car) is faulty. I think you can actually clean them too but I was doing a restore so I just replaced it. Off idle, the airflow meter flap moves and provides a signal to the ECU. Could you please tell me your experience of symptoms of a Common Symptoms of a Failing Throttle Position Sensor 1. Then he does this in the video and also just idles high. The TPS on most E30 engines consists of two switches, so again, the symptoms can vary, depending on which switch (or both) has failed, and depending on which state they have failed in. Following these steps may allow you to diagnose the fault a lot quicker than I did with my BMW 325e. I'd start with checking for vacuum leaks if you've already thrown money at it. 030-0. Feb 13, 2013 · connector, there's a problem with the TPS, or the DME (or Idle Control Module (ICM) on an ETA car) is faulty. Thought I pinned it down to the throttle position sensor. so i was standing around kinda clueless as to why it d On the TPS, I believe canems. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Mar 4, 2023 · Initially the symptoms seemed exactly like a failing fuel filter. I have already replaced:-cap-rotor-plug wires-throttle position sensor-ICV E30 Technical Forums; General Technical; If this is your first visit, be sure to check out the FAQ by clicking the link above. uk sells a "Bosch throttle potentiometer" as part of their TPS and ignition conversion kit but IMO, MS is no better than stock unless you go sequential (add MS3x) Clewett has nice stuff 1978-98 Cam sync adapter w/sensor [1001-61] - $190. 00 : Clewett Engineering, The complete solution for ignition & fuel injection Feb 6, 2018 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Jul 26, 2021 · SYMPTOMS: The issues you will get with a poorly adjusted throttle stop-screw are: High idle. The only reason to fit a variable throttle position sensor would be if you are replacing the ECU with one that is more sophisticated (MegaSquirt or as part of a late May 30, 2012 · The throttle position sensor is just a couple of switches. 5. When I start my e30, it idles and drives normal until it reaches operating temperature/warm. Jan 10, 2010 · TPS E30 Zone Team Member Posts: 13121 Joined: Fri Mar 06, 2009 11:00 pm Could this explain away the symptoms? Top. I've had the same fault since I bought the car in 2010. . TPS is a pretty common problem on e30s. The symptoms are at about 1500 rpm-2000 the car kangaroos especially when you roll off the thottle from 50,60 mph approx,and when you blip the thottle it fills like its misfiring on one cylinder and then the revs drop right down and it nearly stals but the revs pic up to 1500,also driving at 30,40 at about 1500/2000 it kangaroos rill bad Feb 2, 2022 · E30 Throttle Body Plate Idle Screw Adjustment; Failure Points of E30 Sport Seats; Fixing rocking issue in E30 sport seats (folding) E30 Toolkit options; Fuel Hose standards (SAE and DIN) Free E30 Gasket SVG files (Throttle body, AFM, and Valve Cover) E30 M20 TPS (Throttle position sensor) adjustment and installation Some more details about what's been done/checked. I can hear a click when moving the throttle body off closed but it seems to fit the symptoms. Modern vehicles are equipped with sophisticated diagnostic systems that can detect when the throttle position sensor is sending abnormal signals. Continuity between 18 and 3 and nothing between 18 and 2. The switch should close when the throttle stop is 0. agd931 E30 Zone Newbie Posts: 186 TPS E30 Zone Team Member Posts: 13121 Joined: Fri Mar 06, 2009 11:00 pm May 6, 2025 · While a faulty idle air control valve is a common cause of idle speed problems, several other engine components can cause similar symptoms. O. To help avoid misdiagnosis and unnecessary repair expenses, here are the most common issues that mimic a bad idle air control valve: Bad throttle position sensor (TPS) Bad mass air flow (MAF) sensor; Vacuum Jun 13, 2014 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. Dec 21, 2007 · The cable on the choke valve,disconnect it from either the throttle housing or the actuator itself. 5k idle ever since I cleaned out the ICV, MAF, intake manifold, and repaired a couple cracked lines. Aug 16, 2013 · ChemicalAl E30 Zone Regular Posts: 565 Joined: Mon Sep 22, 2008 10:00 pm Location: Sydney Jun 30, 2013 · I unplugged the TPS when I was having the issues before, and it just made the response worse, and the car ran very rough. After going through the Bentley troubleshooting methods, I found poor fuel pressure at the rail. Feb 12, 2023 · The Throttle Position Sensor (TPS) monitors the operation of the throttle valve. First check the ICV (2-wire idle control valve) Turn the ignition key to run position, but don't start the car. The secondary throttle is stuck closed not allowing air to pass through (even the idle valve). Chasing a high idle on my new to me 85 325e. Plus the throttle body feels a little notchy. Mar 11, 2009 · E30 Zone Addict Posts: 3131 Joined: Mon May 22, 2006 10:00 pm Location: Kent. T, that seems fine. At Bimmerforums, you will find technical how-to information maintenance specifics audio advice wheel and tire combinations and model specific details not found anywhere else. Sep 11, 2016 · According to Jim leive mastermind e30 motoronic guru A car with a bad or improper adjustment of the tps will not get a stomp code I have spare throttle body with a idle set screw and tps that has not been messed with and comparing the resistance test values they are different by a lot. It doesn't affect my TPS but it tracks all the way through the through air meter and gets to the oil filter. Sep 8, 2023 · A throttle position sensor (TPS) is a sensor that monitors the position of the throttle plate in the engine’s throttle body. Old New - Nov 4, 2024 · Per the BMW E30 Factory Manual: Per Bentley manual: To set between 0. Has anyone come across this? I am happy to swap out the throttle body and TPS but given the assault on my bank account from the ICV I want to be sure I'm in the right neighborhood. The cable is notorious for getting stuck because they are frayed. Also, oil in the intake basically filled the switch. 060" off the idle stop screw. My E30 can do it after a few hundred kms. Chugging, loss of power, bogging down, fuel related DTCs, the last of which I was only able to determine after switching from 1. If you're lucky, as soon as you pull the throttle arm you should hear a clicking noise from underneath: that's the TPS switching from its IDLE position, which means that it doesn't need adjusting. When your BMW E30 experiences idle problems, you may notice several symptoms that can vary in severity. Poor or no low-end throttle response. It does nothing useful elsewhere, only at idle or at WOT. Nov 15, 2018 · E30 325i Problem (Page 1) — Lemons Tech — The 24 Hours of Lemons Forums — Jan 4, 2012 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. There's a ton of forum talk about it though. Feb 20, 2012 · Bimmerforums is the preferred online BMW Forum and community for BMW owners. When I hold the throttle in one position the revs will cut out, rev up, cut out, rev up continuously. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Unfortunately, since the youngest E30 is 17 years old, and since a problem like this may be the result of a number of contributing factors, you may wind up replacing quite a bit of stuff before getting to the point of actually being able to solve the problem. A faulty throttle position sensor in known to cause poor fuel eco They sure are! I'd have to add that it doesn't take that long for oil blow by to oil your components up. To start viewing messages, select the forum that you want to visit from the selection below. May 20, 2018 · A common glitch on the BMW E30 3 Series is erratic engine idle constantly surging between 800 and 1800 RPM. A damaged, malfunctioning TPS can cause variety of symptoms which are also known as symptoms of a bad throttle position sensor. It sends this information to the engine control module (ECM), which uses it to control the fuel injection and ignition timing. Throttle position sensor, had to replace it on mine, same symptoms. Evap barb – the barb itself doesn’t leak, but it must either be capped, or there must be no leaks between it and the purge valve that connects to it. Mar 1, 2022 · *Also consider complete TPS replacement with a Facet or Bosch brand replacement, as over time the E30 TPS fails by way of solder joints failing within; causing intermittent failure symptoms. Anyone have any experience changing one? I bought a new sensor, a new water housing, 3 screws for tps water housing, a gasket for housing, and a new throttle body gasket. Because this part has such a profound effect on the way your car engine runs, it’s important to know the symptoms of a bad throttle position sensor. The sensor, mounted at the bottom of the throttle plate shaft, tends to fill up with oily gunk that drips down the throttle shaft. I have adjusted the tps , so continuity when throttle closed, then no continuity part throttle followed by continuity when W. New: Cleaned intake tract, Vent/breather hose, Vacuum caps on manifold, Vacuum fittings in throttle body and associated hoses, Dip stick orings, Valve cover gasket, Crank sensor, Main relay, "The big timing job", Valve adjustment, Blue temp sensor, Plugs, Coil, Assortment of ICVs, C101, c191 both cleaned and greased, OBC Relay Bypass, Belts, Sep 3, 2011 · Are you sure you're describing the symptoms accurately? Top. 6. It idles fine, but when I go to hit the throttle, sometimes it will hesitate and catch. Could you please tell me your experience of symptoms of a Key Takeaways. Leaving the TPS plugged in but unplugging the AFM sliiiightly improved response, and unplugging the ICV and AFM sent everything to sh!t, as expected! Symptoms of bad throttle valve position sensor in your car. Symptom in my M43:Everything normal when engine on but the car doesn't move. It only can use a signal telling when the throttle is at idle or at wide open throttle. The check engine light may activate due to a malfunctioning throttle position sensor (TPS), signaling the need for diagnostics. I'm leaning towards TPS. Check Engine Light (CEL) or TPS Warning Credits: Stoqliq / Shutterstock. Our professionals are here to help make sure you find the answers you need to your questions and our community is here to help other brainstorm Mar 31, 2024 · Are you experiencing erratic engine performance or getting P0120-P0124 engine codes? It could be a sign of a faulty Throttle Position Sensor (TPS). Post Wed Mar 11, 2009 7:09 pm. Idle control valve seems to be working, temp sensors seem good. Check An E30 will idle OK with the AFM disconnected from the throttle body. With this big hole bypassing the bleed passage, the CO adjustment screw will now have little effect. 3 ECU. Oct 15, 2014 · Hi all, (copied from my build thread) So i did some tests the other day on the electrics/sensors with his multimeter that is a lot flasher than mine, the coils came back reading good, and so did the crank angle sensor and cam position sensor. In today’ zd3bx E30 Zone Regular Posts: 638 Joined: Sat Apr 06, 2013 10:00 pm Location: London Jul 21, 2013 · Hope someone can help me figure this out. Here are some common signs to watch for: Rough or fluctuating idle speed; Stalling when Jan 2, 2022 · throtle sensor how it works and bad common cause The TPS on most E30 engines consists of two switches, so again, the symptoms can vary, depending on which switch (or both) has failed, and depending on which state they have failed in. Let’s get into the details of the symptoms and how to fix them. Mar 17, 2025 · Understanding the symptoms, causes, and solutions is crucial for maintaining the performance and reliability of your E30. e301988325i E30 Zone Addict Posts: 3701 Joined: Fri Feb 01, 2008 11:00 pm Location: Taunton, Somerset Taunton, Somerset dirtee-herbert E30 Zone Regular Posts: 327 Joined: Sat Apr 23, 2011 10:00 pm Location: Keighley, West Yorkshire. 1990 US spec 325i sedan Hello Reddit! My e30 seems to be having some issues with the idle control valve being constantly in the closed position, regardless of input from the AFM or the TPS (afm seems to be in spec and tps is new). Bingo! Got to be it! May 26, 2025 · A chevy throttle position sensor reset recalibrates the communication between your throttle body and engine computer. For the DME (or ICM) to control idle, the idle switch in the TPS must work correctly. ulj wjmkw ajv ubnnnvy kaibbr qitzjwf oemvnmd oyop omtcblio wdc