2002 M54 3.0iA Strange startup when warm (Fault code P1632)

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Ferdinand
Joined: Sun 16 Nov, 2008 17:25
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  Z3 roadster 3.0i
Location: Sjælland, Denmark

2002 M54 3.0iA Strange startup when warm (Fault code P1632)

Post by Ferdinand »

My beloved Z3 2002 Z3 3.0iA (now at 90.000km) is currently giving me nightmares - it's difficult to start when it's warm..... I've only experienced it after more than an hours parking though....

I serviced the car in the end of June 2013 - some 4.000 km's ago as follows:

Changed:
Engine oil an oilfilter.
Brake fluid.
Cleaned and lubed brakes.
Added a can of injector cleaner to the fuel.
Cleaned airfilter (K&N)
New 12V Battery to 74Amp 740 cca AGM-type (original battery was from 2002)
Plus gave it a good wash and wax of course - also did a reset of the service indicator (km, time)

I changed the battery because the car had a funny way of starting some times a couple of weeks earlier on. It cranked ok but idle was veeeeery slow, exhaust fumes was black (guessing unburned fuel)- It sounded like starting an old carburettor car - so I stepped shortly on the accelerator pedal "to make it up" - and that made the idle rise immediately and the colour of the exhaust fumes turned normal.

I thought that a new battery would remove this problem - but got a whole lot wiser a few days later..... the problem was apparently still there :head:

I changed spark plugs a few days ago - the original ones were NGK - local parts shop only had Bosch, so I bought those - I'm not religious (not very religios at all in fact)about spark plugs - as long as it's a quality brand - it's fine with me..... - hoped/thought that it the old ones might be the problem - but no.... problem it still there :bawl:

Fuel consumption has been ok all along - a sligth improvement with the new plugs, which is just fine by me :D

There have been no fault codes for a long time, but last week I got a fault code P1632 (Throttle Valve Adaptation Condition Not Met)
I found this online and will try it today:
http://forums.bimmerforums.com/foru...2 ... on-Not-Met

Although mine is a 2002, and this year should have an improved TB to the earlier models, it could be faulty on mine ;o( I'll probably have to replace the Throttle body - have prior to this recent occuring problem gotten several fault codes and I'm tired of looking at the orange EML, engine-, brake- and DSC light. :rage:

Will also clean MAF again - just to make sure it isn't the culprit :nerd:

I've checked the air hoses visually - will do a test with spraying some kind of flammable content onto the hoses while the car is idling to see whether idle increases - and by that I should be able to see whether any airhoses has perished.

I've contacted 2 local dealers - they didn't care 5 seconds about my problem, and I got no help at all :o( That's apparantly BMW nowadays..... I called a company Schmiedmann, and told them about my problems with the car... They met me with a completely different attitude - and though the company is 100 km away and I'll have to pay a fortune to cross a bridge to get there - there's no doubt in my mind that I'll buy whatever I need at they're place to get the problem solved and the car running as intended again, if I can't find the problem myself or with your help :drive

Looking on the internet brings many input - and I'm thinking that the water temperature sensor could be faulty..... Ohh how I hate and love modern at the same time cars!!!.

Help!!! What the h... is going on???
Last edited by Ferdinand on Sun 10 Jul, 2016 06:04, edited 2 times in total.
Ferdinand


BMW 3.0iA Sport Edition 08/2002 - iPod kit, CTEK MXS 7000 batterycharger & Protek Protector Roof Cover ;o)
Range Rover 4.6 V8 HSE 03/2000, Webasto preheater and CTEK MXS 7000 batterycharger
Citroën Xsara 2.0 110 Hdi Prestige hatchback with VTS alloys, Musketier rear spoiler and Webasto preheater
Volvo 144 1.8 B18 09/1967


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BladeRunner919
Joined: Fri 17 Feb, 2012 20:18
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  Z3 roadster 1.9

Re: 2002 M54 3.0iA Strange startup when warm

Post by BladeRunner919 »

If I had to guess, I'd say an intermittent cam or crank sensor fault. But you need to get the BMW codes read, otherwise you'll just be throwing money at the problem until you get lucky and find the issue.
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Jonttt
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  M roadster S54
Location: Liverpool

Re: 2002 M54 3.0iA Strange startup when warm

Post by Jonttt »

When you say clean MAF again I take it you have cleaned it once. That could be the problem (don't ask me how I know) and is an easy check......

Disconnect the MAF completely and the car should run fine with default settings. You may get an engine check light but that will reset itself after driving for a while with the MAF reconnected. It could be an expensive clean lol
Happiness is not around the corner........happiness is the corner
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Ferdinand
Joined: Sun 16 Nov, 2008 17:25
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  Z3 roadster 3.0i
Location: Sjælland, Denmark

Re: 2002 M54 3.0iA Strange startup when warm

Post by Ferdinand »

Oups - wrong car SORRY!!!! it was the Range Rover that I cleaned the MAF on.... Haven't done it on the Z3 yet.... but I've been thinking on doing it because of the KN-filter.... Should I refrain from cleaning it ??
Ferdinand


BMW 3.0iA Sport Edition 08/2002 - iPod kit, CTEK MXS 7000 batterycharger & Protek Protector Roof Cover ;o)
Range Rover 4.6 V8 HSE 03/2000, Webasto preheater and CTEK MXS 7000 batterycharger
Citroën Xsara 2.0 110 Hdi Prestige hatchback with VTS alloys, Musketier rear spoiler and Webasto preheater
Volvo 144 1.8 B18 09/1967


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Del
Joined: Sat 19 Nov, 2011 18:35
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  Z3 roadster 1.9

Re: 2002 M54 3.0iA Strange startup when warm

Post by Del »

Ferdinand wrote:last week I got a fault code P1632
That OBD II code is specific to BMW and suggests a problem with your throttle position sensor (TPS). Being a later, more sophisticated model, I believe your TPS is integrated into the throttle body. These integrated ones can be quite expensive and so it does make sense (as suggested) to get it checked again on BMW specific diagnostics so that you can perhaps pinpoint whether it is a simple "mechanical" valve sticking, bad connection or an actual fault with the sensor.
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Ferdinand
Joined: Sun 16 Nov, 2008 17:25
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  Z3 roadster 3.0i
Location: Sjælland, Denmark

UPDATE - 2002 M54 3.0iA Strange startup when warm

Post by Ferdinand »

UPDATE:


Recently got P0221 - P1632 and finally P1638 - The local dealers wouldn't touch the car, so I had to contact a well reputated tuning company - I ordered a new throttle body assy, and then he told me, I had to wait - hold your breath... 2 weeks to get the car running Again... I couldn't do anything else but order one.. but kept thinking, now can that be right? So I rang a major dealer i Copenhagen, "well mate" they said, how about getting it tomorrow?... WTF..... Tomorrow I said, erhhh could you please get that one for me.... I got it yesterday afternoon - just replaced it and the car fired up as intended - no funny lights, noises or anything - cleaned the ICV - only a bit dirty though, now - I've only jut washed my hands, but will give the car a good wash a take it for a good long drive to see if it works, keeping fingers crossed :?

Well, as long as the Zed behaves - My day can go wrong.... or at least that what I hope for :shock:

I just found out, that my OBD-scanner is dead, I'm feeling a bit unlucky at the moment :bawl:
Ferdinand


BMW 3.0iA Sport Edition 08/2002 - iPod kit, CTEK MXS 7000 batterycharger & Protek Protector Roof Cover ;o)
Range Rover 4.6 V8 HSE 03/2000, Webasto preheater and CTEK MXS 7000 batterycharger
Citroën Xsara 2.0 110 Hdi Prestige hatchback with VTS alloys, Musketier rear spoiler and Webasto preheater
Volvo 144 1.8 B18 09/1967


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Ferdinand
Joined: Sun 16 Nov, 2008 17:25
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  Z3 roadster 3.0i
Location: Sjælland, Denmark

Re: 2002 M54 3.0iA Strange startup when warm

Post by Ferdinand »

Update:

Gave the car a good wash - as usual by hand of course :D

Got a new OBD-scanner from the shop where I bought without any problems - will give the car a good run tomorrow to check, that everything is hunky-dory - going to a "cars & coffee" gathering 70 km from home - with the soft top down, listening to the lovely straight six - and maybe a bit of Bryan Ferry :drive
Ferdinand


BMW 3.0iA Sport Edition 08/2002 - iPod kit, CTEK MXS 7000 batterycharger & Protek Protector Roof Cover ;o)
Range Rover 4.6 V8 HSE 03/2000, Webasto preheater and CTEK MXS 7000 batterycharger
Citroën Xsara 2.0 110 Hdi Prestige hatchback with VTS alloys, Musketier rear spoiler and Webasto preheater
Volvo 144 1.8 B18 09/1967


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Ferdinand
Joined: Sun 16 Nov, 2008 17:25
Posts: 444

  Z3 roadster 3.0i
Location: Sjælland, Denmark

Re: 2002 M54 3.0iA Strange startup when warm

Post by Ferdinand »

Dooh!

Went to the the weekly "Cars & Coffee" this morning. And tried a very special car - A car based on a 1935 Morris - jezzez - I can' remember when I had so much fun - at least with clothes on.

http://youngtimer.dk/Roskilde2013/18-7/ ... CN4393.JPG
(Picture taken earlier this year with the actual owner behind the steeringwheel - he's a very nice chap :D


Anayway - back to the Zed.... Problem not solved. Still have to give it a bit of throttle to start it whem it's warm (parked for 3 hours) - but at least it starts without funny lights etc..... Arghhhh . WTF is going on????
Ferdinand


BMW 3.0iA Sport Edition 08/2002 - iPod kit, CTEK MXS 7000 batterycharger & Protek Protector Roof Cover ;o)
Range Rover 4.6 V8 HSE 03/2000, Webasto preheater and CTEK MXS 7000 batterycharger
Citroën Xsara 2.0 110 Hdi Prestige hatchback with VTS alloys, Musketier rear spoiler and Webasto preheater
Volvo 144 1.8 B18 09/1967


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Ferdinand
Joined: Sun 16 Nov, 2008 17:25
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  Z3 roadster 3.0i
Location: Sjælland, Denmark

Re: 2002 M54 3.0iA Strange startup when warm

Post by Ferdinand »

Update... At last...

Haven't used the car much for quite some time.... Because of the hot start problem and almost constant occuring P1632 fault code, which means, that the throttle is useless.... Car only runs in fault mode = 15 miles/hour top speed :head:

The other day I was looking for a solution again - for Gos knows how many times.... And finally found something on the issue from no other than BMW themselves:
http://www.bimmerfest.com/forums/attach ... 1219084451

It turns out, that the problem is a well known problem on cars with M54 engines.... Since I had already replaced the Throttle Body Assembly some time ago, the next thing accordint to BMW is to replace the entire engine wiring harness..... So I ordered a new one from my local stealer, and changed it today.... Holy cow.... I was worried during the proces, but I'm used to fixing all kinds of jobs/ issues on my cars, so I thought that I would do this myself.... Fired up the engine afterwards, cleared the fault code from its last run.... But it actually seems..... Dare I really say/ hope it out loud.... that the problem might be gone now.....

Will let you know.... I really miss driving the car, but lost patience and almost my love for it, because of not knowing whether it would start/ run when I needed it....
Ferdinand


BMW 3.0iA Sport Edition 08/2002 - iPod kit, CTEK MXS 7000 batterycharger & Protek Protector Roof Cover ;o)
Range Rover 4.6 V8 HSE 03/2000, Webasto preheater and CTEK MXS 7000 batterycharger
Citroën Xsara 2.0 110 Hdi Prestige hatchback with VTS alloys, Musketier rear spoiler and Webasto preheater
Volvo 144 1.8 B18 09/1967


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