325 IDLE PROB ?
Moderator: martauto
I HAVE A 325 TOURING AUTO WITH 117000 MILES IT HAD A WATER LEAK AT NUMBER 6 CYC BETWEEN THE HEAD AND BLOCKE.NOT BETWEEN THE OIL OR WATER JUST THE WATER TO THE OUT SIDE .ANT WAY CHANGED THE PUMP VISCOUS CAM BELT AND TENSION NEW HEAD GAS GET .BEFORE THIS CAR WAS A LITTLE HOT BUT RAN FINE .PUT HEAD ON AND TOURQUED TO 30 NB THEN 90 DEGREE THEN WAITED THE 90 DEGREE AGAIN .NOW THE CAR RUNS IN TRAFFIC SITS HALF WAY ON THE MOVE JUST OVER QUARTER .BUT THE CAR SEEMS TO HUNT ON TICKOVER NOT REVVING JUST HUNTING ,GOES LIKE SHIT OFF THE SHOVLE AFTER A 1200 MILE RUN IN NEW TO THIS BUT DOES ANY ONE HAVE ANY SUGGESTIONS ? I HAVE CHANGED THE IDLE VALVE AND RUBBER HOSE ,ALL FINE .WHEN YOU PULL THE PLUG TO THE IDLE VALVE I WAS TOLD IT SHOULD CUT OUT BUT IT DOESNT ,THE ONE I FITTED WAS WORKING FINE ON ANOTHER CAR BUT THAT DOESNT CUT OUT ON MINE EITHER .. MANY THANXX ..THE LONG UN
Read all of this and then cry.
http://www.e30zone.net/modules.php?name ... ic&t=78455
Also typing in caps is nasty to read
http://www.e30zone.net/modules.php?name ... ic&t=78455
Also typing in caps is nasty to read
If I can't fix it I'll f**k it up so bad nobody can!!
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E30BeemerLad
- Married to the E30 Zone
- Posts: 16806
- Joined: Mon Mar 28, 2005 11:00 pm
- Location: Norfolk
inlet manifold not seated correct? did you have this off when you did the head? use new gaskets?
spray WD40 over the manifold where it bolts to the head with the car ticking over, if the idle is very briefly bought back to normal you have an air leak on one of the the gaskets
check all hoses going to throttle body
spray WD40 over the manifold where it bolts to the head with the car ticking over, if the idle is very briefly bought back to normal you have an air leak on one of the the gaskets
check all hoses going to throttle body
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Brianmoooore
- E30 Zone Team Member
- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
On here, yes!THELONGUN wrote:SO ITS A CRIME TO WRITE IN CAPS ?
Not really a good idea to bring yourself to the attention of the mods on your second post, is it?
Can you describe the hunting abit better, what rpms, whats the mpg like, how is the ignition system (rotor arm cap ect...), what year is the car. A little bit more detail required.
If I can't fix it I'll f**k it up so bad nobody can!!
the idle doesnt go up or down it the revs basically stay the same .the engine just drones and hunts not badly but its not right .i left the head complete with the manifolds attached .. only the trottle body came off i checked that .and changed the the inlet rubber which the air box attaches to. would the ecu cause a problem like this ? the car does about 260miles on a tank with speeds of 80 mph .. im not up on injection systems .but the problem reminds me of a faulty advance and retard on a carbruettor . but not a servere .thanxx...mart 
It should idle at 750rpm hot and about 900rpm cold is it? You can check for inlet manifold leaks to the head as they are common spray some wd40, carb cleaner around the inlet manifold and see if you can here the engine note change. Does it smell rich at idle? Also there are different versions of the M20B25 engine depending of the age of the car and it will make a big difference on what you can check how you check it and how you adjust it.
You must remember we can't see or hear your car so we can only offer suggestions on the information you give us the more detail about the car, what you've tried or changed and description of the problem the better.
You must remember we can't see or hear your car so we can only offer suggestions on the information you give us the more detail about the car, what you've tried or changed and description of the problem the better.
If I can't fix it I'll f**k it up so bad nobody can!!
i have checked all the rubber hoses etc and sprayed the joints and no difference .would the throttle sensor under the throttle body cause this ? tried all i can think of and no joy ,maybe just my engines wayof idleing ? thanx for all those who have sent in suggestions ...
I had problems with my 325 idling-was doing this hunting too.
I changed all manifold gaskets and elbow joint rubber. I cleaned throttle body and icv and still had same prob.
Changed the icv which improved slightly but still hunting and was beginning to p**s me off.
Then read in "BMW restoration manual"about splitting the throttle position sensor, thoroughly cleaning it until it clicks on and off properly.
Did that and it worked!!! Wished I had done it initially when I stipped manifold.
Touchwood , idling perfectly hot and cold as described above.
Maybe worth a try?
I changed all manifold gaskets and elbow joint rubber. I cleaned throttle body and icv and still had same prob.
Changed the icv which improved slightly but still hunting and was beginning to p**s me off.
Then read in "BMW restoration manual"about splitting the throttle position sensor, thoroughly cleaning it until it clicks on and off properly.
Did that and it worked!!! Wished I had done it initially when I stipped manifold.
Touchwood , idling perfectly hot and cold as described above.
Maybe worth a try?