Hey all

My ts V6 has slowly been developing an issue over the last few months. When accelerating (mostly in second gear) it would be smooth then suddenly stutter and drop power for a second or two then go back to normal.

Was only slight to begin with but has now become quite harsh to the point where the car would noticebly jerk around. There is sometimes even a knocking noise coming from the front right wheel when it happens now.

Asked my mechanic to look at it while is was getting a service done. They reakon they took it for a drive and they didn't notice anything and said it was probably clogged injectors and i should run some 98 octane through them. I don't think it is quite that simple and their test drive probaly consisted of driving it into the garage and on the hoist, got the impression they didn't wana spend time diagnosing the problem.

Anyone have any idea?

I'd be looking at leads, plugs or fuel filter first mate. Sounds like a slight miss. I had the exact same problem and it ended up being someone forgetting to plug the lead into a plug properly.

If not done, replace your fuel filter, test your fuel flow and pressure.

Check your cap, leads etc

98 octane will do nothing to clean the injectors, only a proper clean (not rubbish in a bottle) will do this.

Disagree,

I checked my throttle body for the first time the other day, I always use BP Ultimate and every now and again a bottle of injector cleaner, and the throttle body was literally sparking clean, i felt it with my finger and everywhere it was VERY clean smooth metal, no oil/greast/gunk or whatever AT ALL. Mind you using BP Ultimate just once isnt going to clean ur fuel system in one shot, but use with a good quality fuel system cleaner and it will do some good.

Ollie

Had the fuel filter done in a previous service about 6 months ago. Also had the throttle body cleaned a while ago (more than a year).

A mechanic friend of mine drove the car and felt the problem. He suspects a spark issue (leads/sparkplugs/distributor) but unfortunately he's not working as a mechanic anymore so he dosn't have the equipment/time to fix it for me.

Does Madmagna or anyone else recommend someone in Adelaide who would work this problem out for me? or a mechanic that specialises in magna's?

yeah my TR V6 did the same thing change your spark plugs :D thats all i did and the problem is solved :D

Nick

im running NGK Iridium spark plugs but it has been over 40thou k's since i had them put in

perhaps it time i replaced them and replace the leads at the same time

I would take your dizzy cap off and check the contacts on the cap and also the rotor button (I had put a new one and within 8K it had somehow bent:nuts: )

I had the same problem, and changed leads, plugs,new coil,new dizzy cap,auto service, only run it on 95ron anyway and a new rotor button

and by chance I looked at the TPS plug and it was dirty so I cleaned it and never had a problem again

TS V6 is prone to getting oil onto the outside of the plugs. Remove/clean plugs if they have been in there for 40,000Km. I had the same problem, the plugs were good but some had oil on the outside. Cleaned, replaced - no misfire!

PS What's the obsession with keeping the throttle body clean? Its only flowing air, fuel goes directly into the inlet just before the intake valve!!! If the throttle body is dirty with carbon, there must be some major leaks in one or more intake valves!

Disagree,

I checked my throttle body for the first time the other day, I always use BP Ultimate and every now and again a bottle of injector cleaner, and the throttle body was literally sparking clean, i felt it with my finger and everywhere it was VERY clean smooth metal, no oil/greast/gunk or whatever AT ALL. Mind you using BP Ultimate just once isnt going to clean ur fuel system in one shot, but use with a good quality fuel system cleaner and it will do some good.

Ollie

Fuel and injector cleaner go NOWHERE near the throttle body!!!!
If you want to see if Ultimate/cleaner are working, pull the injectors!

Fuel and injector cleaner go NOWHERE near the throttle body!!!!

EGR does mate. Alot of the vacuum systems run through it. The build up is mostly due to oil vapour from the PCV

The injector cleaner won't clean that up - carbon buildup at the pcv port is more an indication of engine condition.
My point is - saying that Ultimate/cleaner keeps your throttle body clean is illogical.

EGR? Exhaust gas recirculation?
Since when do cars with catalytic converters run EGR??
I don't see any big pipes running exhaust gas to the throttle body! (feel free to correct me)

The injector cleaner won't clean that up - carbon buildup at the pcv port is more an indication of engine condition.
My point is - saying that Ultimate/cleaner keeps your throttle body clean is illogical.

EGR? Exhaust gas recirculation?
Since when do cars with catalytic converters run EGR??
I don't see any big pipes running exhaust gas to the throttle body! (feel free to correct me)

Hmm, I thought you were right till I read gotrice's post. Now im not sure. I leave it to others to discuss :D Though judging by the cleanliness I would guess it does get to the throttle body, but im no expert.

And I also thought that heaps of cars still had EGR with car converters, like even 3rd gen magna's???

Ollie

Fuel tank-->fuel line --> fuel rail --> injectors --> cylinder ---> BANG --> exhaust port.

Fuel tank-->fuel line --> fuel rail --> injectors --> cylinder ---> BANG --> exhaust port.



Insert after BANG--> BLOWBY enters the crankcase.... leaves through the Rocker PCV (possitive crankcase ventilation) and enters before the throttle body.....Carrying oil and CRUD

Learning lesson completed...insert cheesy grin here---->

Correct! In a worn engine there will be a bit of a mess in the throttle body because of this. The best way to clean this is with carb cleaner, pref with the throttle body off the car. Expecting Ultima or injector cleaner to clean this up is illogical. If you find a throttle body as clean as, you can't say "its clean because I use Ultima and injector cleaner". Instead say "its clean because I have a healthy engine with little blowby".

My point is this - only air (and blowby) go through the throttle body. No fuel or additive travel through it, so they cannot be expected to have any cleaning action within the throttle body.

QUOTE
" . . . judging by the cleanliness I would guess it does get to the throttle body, . . . ."
UNQUOTE

Somebody please explain! Perhaps he is confusing the way a carburettor functions with EFI?
Perhaps he is pouring the stuff into the intake while the engine is running?

My last words (honest!)

If I wanted to check the cleaning efficiency of fuel and additives I would pull the injectors.

If I wanted to see how tired my engine is, I would pull the throttle body and look for a build up of carbon and "crud".

excessive blowby makes its way into the throttle, via the EGR system, and if bad enough carries a lot of oil mist with it, dirtying up the TB.

130,XXX kms and mine could have done with a degrease and a wipe, nothing serious, but now 200XXX with blow valve stem seals, its charcoal black as a lot of exhaust gas is making its way into the head, misting up the oil badly

not sure whether this is the same thing, but just recently, my v6 TR has been playing up also. only when its accelerating or sitting in idle, and it only happens when in drive, but the car seems to slip or misfire. we (me and dad) are not sure whats causing it. i thought its the transmission, but when im driving, the whole car will shudder because of this and there is an extreme power loss until it reaches about 5000 revs.
hope this makes sense...
any ideas?