VR Problem
How can i tell if a car is running off 5cyclinders?
and how do i fix this?
cheers
Hi,
I would suggest starting with the ignition component of the combustion.
1.) one at a time, while the engine is idling take off a spark lead from your coil pack. if it idles more roughly it would suggest that it is not that cylinder, replace the lead and check that the idle returns to how it was prior to removing the lead.
2.) repeat this for each lead, if removing one or more of the leads does nothing to effect the engine's idle it would suggest that there is an issue with those leads/spark plugs of the coil for that cylinder.
3.) if none of the leads makes any difference it suggests that your plugs, coils & leads are ok, you may be looking at a fuel or compression issue, i.e. an injector may be blocked or require cleaning or you may have fried a piston ring. if this is the case a professional may be required.
hope that helps
Just a note: don't use your bare hands to remove the leads, it will shock you. try carefully using a set of good pliers to gentle pull off the lead.
Cheers mate ill check it out and get back to you asap on that one!
Yea its been idling rough, even when at 1000rpm and the exhaust makes this putt putt putt noise not a straight noise
Don't take a spark lead off while the motor is running, you may get a shock and damage the module, to test if a cylinder is not running disconnect one injector plug at a time and listen if the revs drop and idle diminishes.
This way you also keep un burned fuel out of the exhaust/cat.
ok im confused now haha isnt that the same thing haha....
what else could i do to stop the car idling rough?
what do i do for a tune up? cus i cbf taking it to a mechanic!!
cheers
Just disconnect one injector at a time while the motor is running.
If the revs change that cylinder is good.
ok so if the revs dont change then thers a problem! and all i have to do is put a new lead on that injector? so if the revs dont change its shit ok think i got it
Ride Or Die.
1. find out which lead is causing the issue, genally noticable by the revs not dropping at all when removing the lead and and change the lead.
2. if changing the lead over doesn't fix it check the spark plug and clean it.
3. if cleaning the spark plug doesn't help replace the spark plug.
4. if changing the spark plug doesn't help then you probably burnt out a ring and should seek the aid of a mechanic or mechanically minded friend to help fix it.
thanks for that mate ill definatly check and do all that!
cheers
let u know how it goes
Ok i checked the leads and the injectors on the weekend now I did the process u told me for the injectors BUT yes one failed NO#3 when i pulled it off while engine was running it died straight on me but when i pulled all others off the engine revs just changed and the engine didnt die!
So now iv found the problem with injector NO#3 what should i do??
Cheers
looks like no3 is running ok, not a problem as you suggest with that one
illd start with a new set of spark plugs, pretty cheap, $20 or so should get you 6 new plugs
then if this dosent make things much better, look at a new set of spark plug leads around $50
still haveing problems after that? illd check the coilpack, if you know someone with a engine the same thats running well, see if you can borrow there coil pack and fit it to yours and see if theres a differance
coil packs can die, as ive had a few issues with in te past with them
illd say that will cover a good 90% of the issues with a miss
you could try a compresion test after that if still dramas
or could be a blocked injector
do the same as i mentioned with the coilpack, but change the injectors with ones you know are ok
ok sweet mate will have a check today and get back to you asap!
also how much would a coil pack cost?
i got told a mechanic suggested when i got RWC which failed due to stalling done that the coil pack has to be replaced but not that bad of a problem he said 500$ with man hours so how much am i looking at?
cheers
Yeah no.3 is ok, you were looking for no change in idle for a dud cylinder.
As above, you could have dirty plugs.
All cylinders should react the same when you disconnect an injector so you must have a slight problem with the other 5 cylinders.
A loose spark plug lead or a faulty coil could be your problem if the plugs look ok when pulled.
If you are low on cash then pull the plugs first and have a look.
Do you have a mate you can swap out coils, one at a time, to narrow down the problem?
oh ok so when the injector is out the engine should have died which means that cylinder is fine ok now i understand haha...
so another words with the other 5 cylinders when i took the injectors out one by one the revs sat there and changed a tiny bit which still means they have problems?
nah i dont but i bawt a pack the other day....
ok so ure saying when one injector is out the engine should stall ok well thats hard haha so another words all the other injectors didnt stall the engine when pulled out which means iv got 5 shit cylinders?
Yea im going to replace all spark plugs and leads today!
I will get back to you asap.
Cheers
if you cant be bothered buy a multimeter ($20) and check the coil packs to see if currenet flows, have you tryed getting a code readout?
Hi,
You're misunderstanding the advice slightly.
Consider the way an engine works. If all cylinders are firing correctly, operation is smooth. If one cylinder stops firing, operation gets rougher. If two cylinders stop firing, than operation will get rougher still.
So, if you pull the injector/spark plug from a cylinder and operation gets rougher, you've now got two cylinders not firing - ie. the one you pulled out isn't the problem. On the other hand, if you pull the injector on a cylinder and nothing changes, you've still only got one cylinder not firing - the one you pulled.
If you pull the injector and the engine stalls, that's just a side effect of having made it run rougher by removing one of the GOOD cylinders.
Of course, that assumes that one of the cylinders has stopped firing entirely - it sounds like that's not actually the case, and you may have small faults on several cylinders.
Just clarifying what others have said.
illd put my money on faulty plugs and leads, being the problem atm
as 5 cylinders seem to be a little down on spark
a coil pack should not cost over 100 bux at the wreckers
if they do charge over, shop around
ok well thanks guys for all your help ill play around with the car and new plugs and leads and see how she goes and get back to you asap!
cheers once again
on holiday
brandnew DFI's for under the coils on ebay for $52 bucks right now if anyone is looking
I tune the oldschool way fear on the passengers face and knuckle colour cant go wrong
tabbacco is still my favorite vegetable
Also one thing to clarify:
Spark Plugs and Injectors are Completely different things.
Spark plugs are located near the Exhaust outlets on your engine, they will have leads going to them from your coil pack.
Injectors are located at the top of the motor all connected by the fuel rail. (injectors do have a trigger lead on them)
I would Not remove either of these while the engine is running, instead just disconnect the lead going to them.
(remembering to disconnect the Spark plug leads at the coil pack end - WITH PLIERS or something else non-conductive, so as to not get shocked)
If after all your testing (and possibly relpacing) of these components you get the same result, that could indicate a bigger issue (as mentioned above, maybe your coil pack, timing issue, etc..)
hope that summation helps
cheers
have you taken the spark plugs out?
^ yeah.
To clarify, yes theSeekerr is on the money and yes I meant unclip the electrical connector to the injector, pulling plug leads is not needed and asking for trouble.
hey guys i have replaced all spark plugs with new NGK one and new spark leads!
engine idling good just still making the exhaust put put put put noise in idle weird!
Im waiting on a coil pack from ebay to come to melbourne hopefully today!
Any suggestions on the exhaust when its idling?
Cheers
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P.S. THANKS FOR ALL URE HELP GUYS!
JUST realised i lookd up a picture of a vs engine and it has the round coils. Now i have a second series VR should it have the square coils or round coil pack like the vs?
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