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View Full Version : KR Verada 92 - Misfire



doolz_e
31-01-2008, 02:09 PM
Hi, new here so sorry if the questions comes off a bit simple.

I have owned my fantastic 92 Verada 3.0lt 172,000kms for a year now and it has been running like a dream (except for the overdrive on the transmission). Until now.......

Took the machine on a long haul drive from Melbourne to Adelaide and back again over Xmas. After getting back the car started to splutter a bit on take off up to 70kms. After this it seems to be fine, unless going up a hill and putting the car under load ie: When the air con is on.

Took it into a non Mitsi mechanic who quoted me $450-500 for:

Tune up
Bass idle adjustment
Dizzy Cap
Lead
Plugs
He also thought it may ned a new rotor button as well but hadn't checked this???!?!?!!!?!

Now I am no super mechanic but after pricing the parts myself this quote still comes in pretty high. He tried to justify this by saying that the back plugs are hard to get to and may need to take other things apart to get to them. He also mentioned that there were platinum plugs in there and he wants to replace them with new platinums because they will last longer saving you having to to a fiddly job more often.

My prediction is that I replace the leads and plugs myself. I have not played with the back ones yet but front seem easy enough. Are the back ones really that hard to get to?

Was also thinking about changing over to a K&N Filter whilst I am at it and then see how the car runs.

Any thoughts, tips and suggestions on this would be much appreciated.

Doug
31-01-2008, 02:47 PM
the back bank of plugs are hard to get to for a qucik change as you have to take the plenum off. its do-able but takes time and effort. that is why you will normally find the platinum plugs in there, so it doesnt have to be done as often. it does take time and that will always add to your mechs bill. but what the mech is saying sounds like a good start to fixing the prob. not too sure of the price tho, not my strong field.

GoTRICE
31-01-2008, 03:16 PM
the back bank of plugs are hard to get to for a qucik change as you have to take the plenum off.

No you dont on a 2nd gen and i doubt any mechanic would actually bother taking the plenum off.
Just reach around easy as pie.

Also just buy the 4$ plug if it's running right there's nothing to be gained here.

Sounds like the dizzy cap may have had it.

magna buff
31-01-2008, 04:34 PM
the auto overdrive is not hard to fix its just the overdrive clutch kit you can buy

the box can stay in the car and only a few bolts to get to remove the cover plate ...

downloadable manual http://www.lisho.net/?page_id=3

second gen explains everything

the coil exciter may be faulty thats a small item near the coil and the dissy cap as above

the back plugs are not hard to get to ............done several myself

Changing Spark plugs on a V6

you do not have to remove the inlet manifold to change the plugs

the front 3 are easy
then from the drivers side
the rear plugs 6 and 4
can be reached using a 3/8 rachet extension and plug spanner

then move to the passenger side
remove the coil support bracket
thats 3 x12 mm bolts and one 14 mm bolt

reaching the number 2 plug with the same tools

as you fit the plugs take care starting the threads of each plug then do not over tighten

V6 Dissy advice

the two screws hold the cap on can break in the dissy housing
then you have to drill out the broken screw use the cap as a guide

dont try to just pull the rotor off
the rotor is held on by a bolt on the opposite side of the brass pointer

take the front 3 leads of before removing the cap

the cap hits up against the inlet manifold so you have to turn the rotor
to a certain position before you can get the cap free

to turn the motor over remove the passenger tyre and turn the timing pully

Madmagna
31-01-2008, 04:49 PM
Nothing needs to come off to do the rear plugs, coil bracket included.

mate, you have PM'd me, if you want to pop over on a weekend I am happy to have a look and see if we can simply work out the issue

Doug
31-01-2008, 05:16 PM
No you dont on a 2nd gen and i doubt any mechanic would actually bother taking the plenum off.
Just reach around easy as pie.


damn, could have saved me heaps of work :doubt:

doolz_e
01-02-2008, 09:57 PM
Thanks to all of you. Sound advise for a newbie. Think I am going to attempt the leads and plugs this weekend so will let you know how she runs after that.

Sounds interesting about the back plugs. Can only see how it goes tomorrow I guess.

Thanks for the advise on the dizzy cap. I just looked at the workshop manual and it mentions only to unclip and remove screws. Sounds pretty straight forward to me. However I will take your advise magna buff.

And thanks for the offer Madmagna. Will PM and get in touch soon to discuss. What suburb are you in?

Cheers

doolz_e
04-02-2008, 12:14 PM
Well all good ladies and gentlemen. I can confirm that after changing leads and plugs to a set of Bosch sports the car is now back in order.

Back 3 plugs were a bugger but have to agree with Madmagna, you can rach them without having to take everthing off however number 2 cylinder under the coil did take a bit longer than others. Tip: use a shorter handle ratchet as there is not much rrom to move.

Also get this, the back 3 plugs were not platinum so the mechanic was talking through his exhaust on that one. And the dizzy was obviously not damaged as the car is back to normal now except could do with a routine tune up i.e. timing etc.

Does anyone know where I can get this done in the Richmond to Carlton areas (inner city Melbourne suburbs anywhere I guess).

Didn't attempt dizzy. Do you really have to take off the spare wheel to get the rotor in the right postion to get the cap off? The wrokshop manual doesn't mention anything about that!

Am thinking about investing in a K&N Panel Filter this week. Do you think it is worth the investment? Any tips on installation? How often do you have to clean them?

And thanks to everyone for their help last week. Awesome responses that saved me a bit of cash from dodgey mechanics in the end.

magna buff
04-02-2008, 01:24 PM
cool DIY .effort . thats why I take the coil bracket off to make it easier to reach number 2

only posting from my own experience working on the V6s

the dissy cap.... hits on the inlet manifold any other way .. you may have to undo some of the electrical fittings to make space for the cap to come out as well

remove all the leads off the cap

you can try to turn the engine over with the key and hope the rotor stops in a good spot to remove the cap

if you try to turn the motor at the cam bolt the timing belt may break if all the plugs are in

best and safest method I found was to take off the passenger wheel and turn the motor from the crank timing pully till the rotor s right and allows the removal of the cap without breaking anything

Madmagna
04-02-2008, 01:49 PM
No, he manifold does not have to come off but as it tales me about 5 mons to get moved I prefer to do this.

The rears should not be platinum, that is only in the 6G72/4 S4 motors, ie the TE onwards

You are far better off with NGK, they are a better plug all round

K&N are no different to a clean std filter, there is no data what so ever in a Magna with only a panel fitted on a Dyno. People will say that this goes better, that goes better etc, all a load of rubbish, a human can not feel a slight difference if it is actually there, it is all in the mind

opilot87
04-02-2008, 04:19 PM
I got a K&N panel filter from ebay for about $80 for my KS Verada, cant say I felt any difference, not sure about noise as I havent really compared on and off, but definitely not a big or that noticeable difference IF there is one.

However, I like the fact that if anything, there is a small but noticeable increase in power/economy, and that compared to a dirty filter, it will probably make a very slight difference. I also try to justify my reasoning by thinking that as I wont ever have to replace the filter as they can be cleaned, it will not cost much or probably save me money in the long run.

Ollie

Madmagna
04-02-2008, 04:25 PM
K & N are good filters, only issue is that most people do not know how to clean them properly or for that matter know how to re oil them.

You will find an increase over a dirty filter, as you would by putting a new std filter

doolz_e
05-02-2008, 08:14 AM
Thanks once again guys. I did do some research of my own and found that the K&N filters are relatively overhyped. An American forum had alot of people saying that the filters actually let in more dirt meaning more engine wear or change your oil/filter more often. That couple with the whole cleaning and re-oiling the filter I think I will stick to the usual Paper filter. Especially if that power differnce is not measurable by dyno.

I mean if these oil filters were that good and lasted so long why wouldn't the likes of Ferrari and other luxury/sports/race brands bring them engines out with K&N as standard?