Rover Motor running problems
Have an account? Register

Forgot your password?

Forgot your username?

 
Likes Likes:  0
+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 10 of 17
  1. #1
    Rods 'n' Sods Junkie matt100e's Avatar
    Join Date
    Jul 2009
    Location
    Stroud
    Posts
    267
    Images
    17
    Post Thanks / Like
    matt100e is offline

    Rover Motor running problems

    Hi Guys,

    got a 3.5l RV8 motor in my escort, and its been running like a gran on a zimmerframe for the last couple of months....been playing with a few things installed a new performance coil and new magnecor HT leads so far.

    Problems I am having is it jumps around a little on idle when up to temperature. Pops and bangs and jumps around off throttle and also when cruising when up to temperature. It is also hesitant under acceleration and does all of the above with no choke, lots of choke well, any kind of choke really...

    The engine also dies at slow speeds/when at a stop, off throttle - does this constantly whilst running up to temp and at temp. The problems are all intermitent but happen either all together or one or the other on every run.

    We originally put it down to teh cold weather and having an engine that just plain does not like the cold. However today when driving and getting it up to temp it still carried on..... Been mulling it over with the ol' man and we were thinking about maybe its not breating properly.

    QUestion is how does a RV8 out of a Rover P6 breath....it has a breather pipe out the back of the engine and two ports on teh rocker covers. At present none are plumbed in to the air filter but my ol' mans RV8 has them all plumbed into the air filter....could this make that bigger difference?

    Also any other things to check would be great!!

    Also changed the plugs recently with no change, and fitted a regulator as at the beginning we thought it was too rich now regulated at 5psi and pssibly thinkin now its too lean!

    Help, and thanks in advance

    Matt
    Last edited by matt100e; 30-12-2009 at 16:40. Reason: added some more info

  2. Remove Advertisements
    RodsnSods.co.uk
    Advertisements
     

  3. #2
    Off the Xmas card list kapri's Avatar
    Join Date
    Apr 2009
    Location
    Portsmouth
    Posts
    23,589
    Images
    12
    Post Thanks / Like
    kapri is online now
    If it is running fine before then it is unlikely to be breather system, unless of course one of the hoses is split ( or a sevo fitting etc) check all hoses for splits first. Don't forget the modulator line if it's running a GM180 , split modulator can drag trans fluid up and causer problesm. Any smoking from teh rear when the problem is happening.?


    Start back at basics, pull a lead at a time to see if any specifc cylinders are playing up. Change the plug from a faulty cylinder to another and see if the fault stays with the cylinder or the plug. What do the new plugs look like now ?

    Make a note of the problem shown and what plug. Note any vacuum take offs nearby.


    Examine old plugs for any signs what's going on ie black / oiled / petrolly / too white.
    What carb/carbs as all relevant.?

    Any background history on the engine and running to help ?

  4. #3
    Rods 'n' Sods Junkie matt100e's Avatar
    Join Date
    Jul 2009
    Location
    Stroud
    Posts
    267
    Images
    17
    Post Thanks / Like
    matt100e is offline
    its mated to a 5 speed lt77 box, so that rules out a split modulator i guess.

    The other thing i changed was the air filter and before it had the two vents on teh rocker covers connected to the air filter i have since replaced with just a pair of small filters....should they be connected to the carb to suck the air out? it is also running a 390 holley vac seconds. Car ran fine in the summer tho was running very rich which is why i put the regulator on....think its been playing up since it got colder/ changed the air filter.

    dont really have alot more info on the engine as the car is relatively new to me.

    could it be that because nothing is pulling the air out the engine it is choking itself? as it will still be sucking air in due to the natural vacuum it makes? also do you know which breathers suck air in and which blow the air out? might help if we have it breathing wrong.

    did have a split ont eh vacuum pipe from carb to dizzy but sorted that and hasnt made a difference all other pipes etc are ok.....Pete also thought possibly an air leak?

    Ill check the plugs in the morning, the old ones were a mix of rich an ok - some black an some sandy brown

    Thanks

  5. Remove Advertisements
    RodsnSods.co.uk
    Advertisements
     

  6. #4
    Official RnS Addict fozwanger's Avatar
    Join Date
    May 2009
    Location
    Cheltenham
    Posts
    4,076
    Images
    601
    Post Thanks / Like
    fozwanger is offline
    Matt, you should havbe asked when I was round earliier. The moggy had similar issues and a nice dual point dizzy sorted it out, is your holley jettedd correctly and have you got an inlet manifold leak? I have a spare gasket in the boot of my car!!!!!!!!
    Have you got vapour lock in the fuel lines? It's tight under your bonnet.

    Jeff

  7. #5
    Off the Xmas card list kapri's Avatar
    Join Date
    Apr 2009
    Location
    Portsmouth
    Posts
    23,589
    Images
    12
    Post Thanks / Like
    kapri is online now
    I've never connected my Rover breathers on any of my motor and never had a problem, some seem to have been plagued by them without.

    The reg should be set at 5 psi. The fact it was running rich before and that the plugs reflect that point to 'normal' servicing issues to me.

    To start with reg the pressure down and then set your float chamber levels .

    Use a dial back timing light to check the dizzy timing is correct, usually checked at 3 different rpm with vac advance removed.

    Then pull the new plugs and see what story they tell.

    All this with the air filter left off ,also to check if the new filter is the root cause.
    Last edited by kapri; 30-12-2009 at 21:25.

  8. #6
    Rods 'n' Sods Junkie matt100e's Avatar
    Join Date
    Jul 2009
    Location
    Stroud
    Posts
    267
    Images
    17
    Post Thanks / Like
    matt100e is offline
    Yeah sorry Jeff, was going to mention it earlier when I got back from going out but you an Pete were discussing something, then I forgot untill later on!

    I'll also speak to Pete about the dual point dizzy, think i've got an after market electronic conversion in it atm. Didn't want to have to go down the new dizzy route if possible.

    Not sure on the jets in the carb tbh, we havn't had a look. The float bowl levels were set with it at 5 psi so i'l check the float bowl levels again tomorrow morning, and maybe reg it down a notch to see if it makes any difference.

    I'll have a word with Pete about the timing and see if he can have a look,
    most of that still goes over my head!

    Cheers for your help so far guys!

    Matt

  9. #7
    Rods 'n' Sods Junkie matt100e's Avatar
    Join Date
    Jul 2009
    Location
    Stroud
    Posts
    267
    Images
    17
    Post Thanks / Like
    matt100e is offline
    Hi Jeff and Kev, Pete here. We've had some issues with the running on the car and everything that has been done has had no effect. It did run fine over the summer with only over fueling issues due to no reg fitted. Fitted a reg with my pressure guage in line and set the reg to the float bowl sight level plug and set it so it just trickled out which is what the holly chaps say. The plugs are reasonable, mostly sandy in colour but with a bit of blackening around the outer.
    One thing that I'm not sure of is on the carb, when adjusting the idle the manual says to adjust another screw that is under the carb body which would mean removing the carb to adjust. Not heard of this before, any ideas.
    it does seem that it has been playing up since the weather turned colder so we've increased the idle and checked almost everything but still no improvement. The timing has not been touched since he bought the car and it ran fine in the summer. Kinda running out of ideas.

    Cheers Pete

  10. #8
    Official RnS Addict fozwanger's Avatar
    Join Date
    May 2009
    Location
    Cheltenham
    Posts
    4,076
    Images
    601
    Post Thanks / Like
    fozwanger is offline
    Matt / Pete, PM sent

  11. #9
    Exceeded sell by date Plumpcars's Avatar
    Join Date
    Apr 2009
    Location
    London Heathrowish!
    Posts
    7,723
    Images
    46
    Post Thanks / Like
    Plumpcars is offline
    What kind of ignition sysytem? It sounds electrical and maybe the colder weather is throwing your line of thought?

  12. #10
    Off the Xmas card list kapri's Avatar
    Join Date
    Apr 2009
    Location
    Portsmouth
    Posts
    23,589
    Images
    12
    Post Thanks / Like
    kapri is online now
    Picking up on Steves point what model is the engine ( P6 /SD1 / RR etc )and what plugs are in there ?

+ Reply to Thread
Page 1 of 2 1 2 LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Where you live, Town\City\County etc.

Please enter your full name
This field cannot be edited once it has been completed other than via contacting the site admin. Please make sure the information is correct first time.

Log-in

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

    Similar Threads

    1. Complete, Running, carb Rover V8 ENGINE (or whole SD1)
      By budgiev8 in forum Stuff - WANTED
      Replies: 3
      Last Post: 10-06-2010, 18:36
    2. Replies: 1
      Last Post: 04-05-2010, 12:24
    3. Imagecave problems???
      By bigyellataxi in forum Chat
      Replies: 10
      Last Post: 17-10-2009, 19:51
    4. Rover v8 starter motor...
      By ThomasHarris in forum Stuff - WANTED
      Replies: 2
      Last Post: 23-07-2009, 19:26
    5. BBC running problems
      By vince-305 in forum Tech Discussion
      Replies: 3
      Last Post: 18-06-2009, 08:35

    Tags for this Thread

    Bookmarks

    Posting Permissions

    • You may post new threads
    • You may post replies
    • You may not post attachments
    • You may not edit your posts
    •