Racers
1 posts
Joined: 16/04/2008 18:26:23
Location: Forest United States
WANTED: Idle Air control Valve/Stepper Motor
I am looking for a used Idle Air Control Valve/stepper motor for a 1275 MPI engine(this is the plastic valve w/electric plug & vacuum hose attached to the passenger side of the intake manifold.
Posted: Apr 29, 2008 07:02 PM
gary ward
3 posts
Joined: 15/11/2004 15:35:33
Location: middx United Kingdom (Excluding channel Islands)
Stepper Motor
Hi Don’t know if any one can help me , i have a 1995 1275 spi that is not running as goods as it used to .Its been in the garage and had the normal thing check and changed but still cuts outSome times its after a long run the next it can be after 200 yards , the garage have said it could be the stepper motor , but would have to change it to be sure. The thing is they have quoted about £200 to change it . i cant find any where to show me where the motor is or if it is something that can be cleaned may be . can any one help or may be have any other ideas as to what would cause the problem
Posted: Nov 03, 2010 03:07 PM
Abominator
26 posts
Joined: 14/08/2008 22:14:34
Location: Wishaw United Kingdom (Excluding channel Islands)
Stepper motor needed for 1996 Rover Auto SPi
Hi all,
I've been having all kinds of idling power fluctuation issues and I'm assured that I need a new stepper motor, but the only ones on MiniSpares are for 1997 and on MPi Minis, so I've been looking for breakers with little luck.
What I really need to know is, what years of Stepper Motor would be compatible with my 1996 Rover Auto SPi, and does it matter if it's from an automatic or not?
Thanks a lot.
Posted: Jan 06, 2012 09:18 PM
paslow22
24 posts
Joined: 03/12/2012 07:18:14
Location: Hamlyn Terrace NSW Australia
Hi,
I have a 98 1300 sports pack and parked it one night and the next morning it idled up to 2500 down to 600 rpm, I adjusted the idle up to keep it running and since read in the forum that the idle shouldn't be touched.
Anyway I removed the little rubber boot over ther plunger that comes out of the steppet motor to the idle screw and found it was covered in goop so I cleaned it out gave smear of lube and then reset the stepper motor.
Now all is well, runs ok
Posted: Aug 08, 2013 10:30 AM
Stepper motor adjustment
G'day,
I have a 98 spi 1275 and when I tried to adjust the stepper motor using the acr4 with No. 5 pod showing that the engine is not hot enough the first time.
Could this be the temp sensor even though I replaced it with a new one?
I was running a 78 degree thermostat so I changed it to an 82 degree with the same result even after a 20 kilometre run, still not hot enough.
Second time I tried it read that the idle is not stable, could this be the Lambda sensor?
Thanks
Darryl
Posted: Aug 27, 2015 08:26 AM
JORGE
Joined: 19/03/2007 02:28:15
Location: ROYAL PALM BEACH United States
Did you ever figure this out? I am having the same issue.
I changed out my stepper motor because I could not get it to dial the steps down past +/-60 while the ACR tool wanted me to go to about step 34.
The new stepper motor is doing the same thing.
Once I get the engine hot enough, the idle starts to fluctuate between 680 to 920 RPM, I cannot get it anywhere near the 850 mark.
Posted: Apr 24, 2017 01:29 AM
Aldo Guerrini
4 posts
Joined: 15/11/2008 01:36:02
Location: Ravenna Italy
Yes Iam not very glad to hear such news but ... I am not alone !!!
Acr4 first attempt = unstable idle ... warmed up engine and after four attmpt entered into function 5 ... stepper position 88 ! capable to put the value down to 47 but nothing more. The car sincerly drove better. Once more an attempt and a miracle i was able to fix and save the 31 position. tested the car once more: idle at 4500 rpm ! Went back to garage dimsantled air box went on stepper screw and deliberatley unscrewed it to get a acceptable 1.100 rpm ... No way to fix it properly ! But I will try "usque ad sideram" ... ready to go through the oxygen sensor the stepper and the engine coolant sensor and or the potentiometer ... keep in touch !
Posted: Jun 30, 2017 04:11 PM
Khaleel
13 posts
Joined: 13/11/2007 20:24:29
Location: Bletchley United Kingdom (Excluding channel Islands)
Cooper SPi ECU
Where would i be able to get one of these stepper motors from? Any good second hand places appart from a breakers yard. My stepper motor is corroded right through and now wont idle. It backfires at low revs and appears to fludding the engine out. would replacing the stepper motor sort this out?
Posted: Apr 08, 2008 10:04 PM
Blox
18 posts
Joined: 04/10/2004 20:05:44
Location: Newbury United Kingdom (Excluding channel Islands)
SPI's
ECU reset at southenr carbs in UK made all those things go away. have a modded SPi so runs rich which the ECU doesnt like much whn idling. The fast idle is most likely down to your stepper motor. unfortunately these are integral to the injection body on spis (design changed on mpis) so cpost a fortune new. i paid £395 for a new one about 2 years ago. Unfortunately the stepper motor is very prone to voltage changes so if you alternator/battery is giving problems (or in the past) that could have had an impact on the stepper motors life. Suggest you contact a breakers yard for spi spares!!
Posted: Sep 12, 2005 05:04 PM
pickme
672 posts
Joined: 08/09/2004 23:10:14
Location: Chippenham United Kingdom (Excluding channel Islands)
sensor
Ive just had to change the lamda sensor on my SPi (the one in the exhaust manifold) for similar problems. Seems to have mostly fixed it. Seems a bit early to be changing stepper motors and sensors but I guess your car is 7 years old now. Mines 12, so it seems a bit more reasonable.
Posted: Nov 12, 2005 08:29 AM
Backfiring
The timing is controlled electronically by the ecu. I heard somewhere aboout resetting the ecu, how is that done and also something about resetting the stepper motor that controls the idle, again how is that done? Thanks for the reply.
Posted: Apr 21, 2008 03:51 PM
abs
98 posts
Joined: 08/11/2007 20:20:11
Location: cornwall United Kingdom (Excluding channel Islands)
Re.
Are you sure there are no inlet/exhaust leaks. Check the exhaust manifold,servo pipe connections and vacuum pipes. If no luck there remove and clean the stepper motor, if that fails its off to the garage for a diagnostic test as it could be anything.
Posted: Sep 01, 2010 10:04 PM
kjw911
36 posts
Joined: 10/04/2005 18:45:44
Location: BROADSTAIRS United Kingdom (Excluding channel Islands)
Idle
I dont know if the SPI is similar to the MPI. But my MPI had very irratic idling I eventually fitted a new stepper motor and now it is perfect.
Posted: Jun 09, 2005 07:53 PM
Dutchy
10 posts
Joined: 16/03/2010 22:29:22
Location: Bentleigh East Australia
Not starting & Misfiring through throttle body - SPI
Wooooooo Hooooooo. After adjusting the tappets and setting up the stepper motor and accelerator cable it started first go. unbelievable. the engine sounds strong and smooth. should have it back on the road by the end of the month now to really test it out.
Posted: Mar 08, 2011 11:53 PM
casalky
2 posts
Joined: 27/04/2008 00:55:31
Location: Malaysia
cold start problems
my mini 1.3 spi has severe probs in cold start, not withstanding what time of day.its only the first start then it would be fine, then if its left for more than 5 hours. it would be problems. currently the solution is that i have to manually inject 2 cc petrol into injector chamber, and it will start first time. if not is a 15 - 20mins drain to the battery.quite embarrasing when i hv to open the hood every morn to give my car a daily shot of octane. Any suggestions?BTW, have done the following changes to no avail.1. changed fuel pump2. changed ecu3. changed main fuse to spi4. changed fuel injector head5. changed injector diaphragm6. due to change the trottle body and stepper motor soon.Thanks in advance.
Posted: May 12, 2008 09:32 AM
adamlee84
Joined: 15/06/2008 17:02:38
Location: york United Kingdom (Excluding channel Islands)
MPI Tickover
The icva (idle valve/stepper motor) has 4phases, The ecu selects a phase based on the values from map sensor and throtle potentiometer. I would check the throtle potentiomiter first. It can be checked with a multimeter. Center pin is common, each of the outer pins give variable resistance as you open the throttle. they work as oposites. One value starts high and goes to 0 the other starts at 0 and goes high. If your not getting the 0 readings then the ecu wont select stepper phase 1 thus will idle at phase 2. This could be your problem
Posted: Sep 09, 2008 05:16 PM
Clubz
11 posts
Joined: 13/07/2005 20:10:58
Location: Portsmouth United Kingdom (Excluding channel Islands)
MPI cuts out at idle!
Hi i need help, i have a 1998 MPI mini cooper, a while ago my car was cutting out at idle and i changed the stepper motor(IACV) and this stopped the problem for about four months. After four months it started revving high even when i didnt have my foot on the accelerator but now my poor car is cutting out at idle again. Does anyone have any ideas? please help!
Posted: Nov 11, 2005 01:16 PM
K. Calver
173 posts
Joined: 13/09/2004 07:56:05
Location: United Kingdom (Excluding channel Islands)
-97 mpi failed MOT on emissions!
Explaining all here would take forever - I covered sensor testing how to and what to look for and common issues in Mini Magazine issues 128 and 132.
The MPi does not have a stepper motor on the throttle that can be adjusted - that's on the SPi. Most mixture issues with the injection Minis is caused by failed temp sensors. You say you removed the Lambda sensor... presumably you re-fitted it? Without this the system will automatically run on 'safe/rich' mixture.
Cheers, KC
Posted: May 21, 2007 10:00 AM
involuntary revving
Sounds like the ECU trying to balance out mixture readings. It's called "hunting" and it's the ECU raising and lowering the idle speed in responce to the lamda sensor info about the remaining fuel in the exhaust. It's usually caused by a number of problems but leaking vacuum hose between the manifold and the ECU and poor connection to or faulty lamda sensor.
You could try resetting the ECU first and see if that cures it. Turn the key to position two but don't start the car. Press and release the accelerator 10 times. Then turn the key from two to three to start the car. It should go a bit bonkers for a few seconds then settle down. It'll take a few normal drives for the ECU to work out the correct settings again so don't thrash it yet.
If that doesn't work then it could be the above or perhaps throttle stepper motor sticking.
Posted: May 23, 2008 12:20 PM
Mike Z
12 posts
Joined: 29/08/2010 04:59:59
Location: Richmond Bc Canada
Idling too high
Please give me any ideas to keep this baby going!
I've got an 93 SPI Rover Mini Auto 60 000 K. I just replaced the original leaking head gasket with another head gasket which was made in China. It was no good, and after the work was done, I discovered it was leaking from the front. So, I had to pull it apart again and put another better quality head gasket. I believe it's made in Europe. So far it's good, without any leaks. Adjusted valve rockers. Replaced the oxygen and water temperature sensor. I have checked and adjusted the throttle cable and there is an equal gap on each side of the throttle lever. So, the problem is she idles at 1400 - 2000 rpm, and the stepper motor adjustment seems to be fine. The fuel goes through the fuel trap, into the ECU. Checked and cleaned the PTC heater and crank shaft sensor.
Your help would be appreciated in this matter.
Posted: May 09, 2013 06:13 AM