Vis motor now engine bouncing

varleyjr · 17th January 2015, 14:04

Hi all, I removed my balance vis and cleaned it all out this morning but now when the engine is idling the revs are bouncing between 500 and 1000 and if you stick some revs and release it will stall. Ideas anyone?

stocktake · 17th January 2015, 14:05

hopefully you didn't try to run the car with it off.

Check the rubber seal is in place on the back of the Vis motor but usually that bounces between 2000 and 500

varleyjr · 17th January 2015, 14:07

Yep that's in place

varleyjr · 17th January 2015, 14:08

It was remapped a week ago and I was told that it was not working. I have been around scrappers looking but not found a new one yet.

varleyjr · 17th January 2015, 15:11

Na it wasn't started with it off. I did have to double check it as when it was put back and started it sounded very deep

stocktake · 17th January 2015, 15:17

There is nothing in the Vis motor that can or will cause this other than an airleak from either the seal under the case, or air entering through where you opened the case. If these parts are fine then your problem lies elsewhere.

As for good balance motors, I would be surprised if you could find a good working one in a breakers yard and I am afraid once it has ingested the oil no amount of cleaning will repair the blown tracks on the pcb.

PM me if you want to know about refurbished Vis Motors

bl52krz · 17th January 2015, 20:12

Dave. The vis king.

BigRuss · 18th January 2015, 16:47

All sorted hopefully

After a quick phone discussion about possible causes, it turned out to be gunge from breather all over the map sensor

Russ

varleyjr · 18th January 2015, 16:51

Seemed to run fine after leaving it to cool also. Thanks for your help Russ. Thank you to everyone who helped also Dave for offering his VIS motor service. Now to change the oil mesh filters and get her in the air to check the lambda wiring. Although I'm back to blowing fuse f3 but I can live with that for now. Thanks again everyone

stocktake · 18th January 2015, 17:07

Glad to help, nice to see people coming back and letting us know the problem/solution, we are all learning all the time

D...

17th January 2015, 14:04	#1
varleyjr Loves to post MG ZT Join Date: Aug 2014 Location: Chesterfield (Brimington Common) Posts: 259 Thanks: 2 Thanked 23 Times in 21 Posts	Vis motor now engine bouncing Hi all, I removed my balance vis and cleaned it all out this morning but now when the engine is idling the revs are bouncing between 500 and 1000 and if you stick some revs and release it will stall. Ideas anyone? __________________ http://i585.photobucket.com/albums/s...yjr/MYBABY.jpg

17th January 2015, 14:05	#2
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,596 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	hopefully you didn't try to run the car with it off. Check the rubber seal is in place on the back of the Vis motor but usually that bounces between 2000 and 500 __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident

17th January 2015, 14:07	#3
varleyjr Loves to post MG ZT Join Date: Aug 2014 Location: Chesterfield (Brimington Common) Posts: 259 Thanks: 2 Thanked 23 Times in 21 Posts	Yep that's in place __________________ http://i585.photobucket.com/albums/s...yjr/MYBABY.jpg

17th January 2015, 14:08	#4
varleyjr Loves to post MG ZT Join Date: Aug 2014 Location: Chesterfield (Brimington Common) Posts: 259 Thanks: 2 Thanked 23 Times in 21 Posts	It was remapped a week ago and I was told that it was not working. I have been around scrappers looking but not found a new one yet. __________________ http://i585.photobucket.com/albums/s...yjr/MYBABY.jpg

17th January 2015, 15:11	#5
varleyjr Loves to post MG ZT Join Date: Aug 2014 Location: Chesterfield (Brimington Common) Posts: 259 Thanks: 2 Thanked 23 Times in 21 Posts	Na it wasn't started with it off. I did have to double check it as when it was put back and started it sounded very deep __________________ http://i585.photobucket.com/albums/s...yjr/MYBABY.jpg

17th January 2015, 15:17	#6
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,596 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	There is nothing in the Vis motor that can or will cause this other than an airleak from either the seal under the case, or air entering through where you opened the case. If these parts are fine then your problem lies elsewhere. As for good balance motors, I would be surprised if you could find a good working one in a breakers yard and I am afraid once it has ingested the oil no amount of cleaning will repair the blown tracks on the pcb. PM me if you want to know about refurbished Vis Motors __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident

17th January 2015, 20:12	#7
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,424 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Dave. The vis king. __________________ Great Barr, Birmingham.

18th January 2015, 16:47	#8
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,411 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	All sorted hopefully After a quick phone discussion about possible causes, it turned out to be gunge from breather all over the map sensor Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and 160bhp, Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

18th January 2015, 16:51	#9
varleyjr Loves to post MG ZT Join Date: Aug 2014 Location: Chesterfield (Brimington Common) Posts: 259 Thanks: 2 Thanked 23 Times in 21 Posts	Seemed to run fine after leaving it to cool also. Thanks for your help Russ. Thank you to everyone who helped also Dave for offering his VIS motor service. Now to change the oil mesh filters and get her in the air to check the lambda wiring. Although I'm back to blowing fuse f3 but I can live with that for now. Thanks again everyone __________________ http://i585.photobucket.com/albums/s...yjr/MYBABY.jpg

18th January 2015, 17:07	#10
stocktake Vis Whiz Rover 75 2.5 auto Saloon Join Date: Jun 2007 Location: LEEDS Posts: 20,596 Thanks: 2,057 Thanked 3,056 Times in 1,621 Posts	Glad to help, nice to see people coming back and letting us know the problem/solution, we are all learning all the time D... __________________ Dave... Lost a few stones and a Gall Bladder and part of a bile duct and all of my dignity in the suppository incident