I have a 90 Model TP and i have a strange problem.

When im in top gear doing 100kmh on the freeway... sometimes the engine cuts out... sometimes only for a few seconds.. then kicks back in again like nothing happened.. it used to rarely rarely do it... now it seems to do it a hell of alot more.. getting worse... could it be electrical? distributor maybe? anyone else had this problem? any idea what needs to be replaced? (thank god i have two other complete TP magna's for parts :P)

Possibly sounds like temporary fuel starvation... when was the last time the filter was changed?

As a cheap check try put one of those fuel additives in (wynns spitfire plus etc) and see if that frees things up a bit.

could have a blockage in the lines etc... I say start with fuel

Ok.. changed the fuel filter.. didnt help at all... infact... I think its worse now... it will cut out in almost all gears instead of just the top gear now :(
I think your onto something with the fuel starvation thing... but stuff knows where to start looking! :(

could posibly be your fuel pump dieing

could posibly be your fuel pump dieing


good possibility, or try fuel pressure regulator. sometimes the diaphrams have issues with sustained vacuum.

is it injected or carby

Thanks for the tips guys... its EFI

then yeah definately try a fuel pressure regulator a secondhand one from a wrecker would be a good choice see if it changes the problem at all. Same with the fuel pump second hand one from a wrecker is good start

CAD, I used to have a 90 TP Magna that did almost the same thing, it would just die - with the difference with it was that is was a carbie version, and it would only cut out either idling or when changing between gears, after 3 years the cause was never found, had everything checke, fuel pressures carbie rebuilt - even bypased the idle cut off solenoid, nothing made any difference whatsoever............needles to say I sold it!

sorry I couldnt help!

Take others advice, change cars, i'd highly recommend the TJ\KJ range.....they are soooooo much better!

Thanks guys! I have two complete TP magna's for wrecking so ill try swapping the fuel pumps over...see if it makes a change :)

Just replaced the Fuel pressure regulator.... no luck :(

will try a new fuel pump instead :confused:

Gotta love the Japanese engineering.... even tho the fuel pump is removed from the top of the tank.. there is 1... only 1 bolt holding it to the bottom.. so that the whole tank must be drained before removal... :nuts:

You have to drain the tank to get the fuel pump off?!? That's painful.

I know they sometimes aren't all they are cracked up to be but did you try a fuel additive (injector cleaner)? Something like Wynns Spitfire plus etc I think is "supposed" to coat any little blockages and help them get blasted out... not saying it will work but at least you can strike it off the list. I know it is an extra $15 or so but it could be worth trying.

I take it your air filter is clean too?

I still think it is a fuel or dare I say it a fuel management system issue.

Yea... weird stuff.

I havent tried the fuel addictive no... I always heard they were just **** and never did anything.. or was that the octane booster :doubt:

I just serviced it on the weekend, new air filter, oil filter, oil etc (except spark plugs)

I also replaced the fuel pressure solenoid... its just a process of elimination i guess... :cool:

I also replaced the fuel pressure solenoid... its just a process of elimination i guess... :cool:
Definitely, you may have to follow the lines from tank to injectors, we'll hope not though.

As for whether the injector cleaner additive is a crock... not 100% sure no, but I have a feeling if they were a sham we would have heard more about it.

It is an odd one, if it was the pump you would almost assume that even on WOT at a lower speed you would have it cutting out too... I hope the management system doesn't have a bug.

Hopefully a few more mechanics pop their head in here and lend you more advice.

It is an odd one, if it was the pump you would almost assume that even on WOT at a lower speed you would have it cutting out too...



It is now cutting out at lower speeds :(

WOT?

Hey hyper you could be onto something with the ecu hav you tried reseting it properly (not disconnecting he battery). could be throttle position switch even O2 sensor theres heaps of variables when it comes to problems with cars. What works on one car may not work on another, even if the problem is the same. If it is a sensor problem then maybe get a diagnostics done on the ecu might show up the problem. Never hurts to try

How does one reset the ECU?

If replacing the fuel pump dosent work then i think maybe its mechanic time.. as this is starting to become a little too complicated for the home DIY guy :P

How does one reset the ECU?

If replacing the fuel pump dosent work then i think maybe its mechanic time.. as this is starting to become a little too complicated for the home DIY guy :P
Sorry, WOT = Wide Open Throttle (full pedal on metal)

I don't know how to reset the ECU on pre third gens apart from the battery so I am sorry about that... someone will tell you soon.

At least you are learning something with all this but yeah you don't want to have a mechanical breakdown at the worst possible time or place... A mechanic might be the safe bet... but yeah, get them to show you what it was.

Good luck mate.

Thanks for that Hyper

Now.. today i have replaced these parts

Fuel pressure regulator
Fuel pressure regulator solenoid
Fuel pump
Distributor cap
Spark plug leads
Ignition solenoid

whatever else i cant think of... and no luck yet :(

Must be time for a mechanic by now.. :cry:

Check All Eletric Conectors The Dissy One Could Be Playing Up The Terminals Go Green This Will Cause The Same Problem
Or The Tps

Ive noticed that it dosent really seem to do it when the engine is cold... just once its at operating temp.

Ive changed the Dizzy cap and leads... im gunna try to change the plugs and rotor cap next... see if that helps... if not... maybe the whole distributor :(

I have a 90 Model TP and i have a strange problem.

When im in top gear doing 100kmh on the freeway... sometimes the engine cuts out... sometimes only for a few seconds.. then kicks back in again like nothing happened.. it used to rarely rarely do it... now it seems to do it a hell of alot more.. getting worse... could it be electrical? distributor maybe? anyone else had this problem? any idea what needs to be replaced? (thank god i have two other complete TP magna's for parts :P)

Sounds very familiar to what happened to me last week, cept i stopped dead. refer to my thread: unknown stoppage

Swap the coil?

Coil can sometimes fail intermittantly when they're overheated.

Thanks for your help guys... I replaced the distributor cap and rotor... and it seems to have stopped... for now... I took it for a semi decent drive.. and nothing :) Ill take it to work and back 2morro (70km round trip) and see how it goes.. wish me luck :P

Crossed fingers http://neilk.customer.netspace.net.au/smiley/fingersx.gif ... see, I knew they would start coming out of the wood work lol (the helpful folk)

If you have solved the problem then you have gotta be happy with that!

Sometimes that little carbon brush in the middle of the dizzy cap underneath
that touches the rotor can get worn out... I'm guessing Mitsu design is 'conventional'.

Ok guys... took it to work today... massive improvement... however it did do the same thing once or twice very very very briefly!! 90% improvement though... I think were on the right track with the distributor etc. The replacement cap and rotor i used was secondhand... might be worth buying a new one to see if we can get rid of the problem completely :) anymore suggestions? :)

I think someone has already mentioned it, the coil, they can fail when hot,
maybe even coolant temp sensor (the one that tells the ecu the engine temp, seperate sensor to the gauge) might be faulting resulting in a "misfire".

Just another possibility for u to look at.

or the effects module in the dizzy could be faulty.

or the effects module in the dizzy could be faulty.

Im looking in the manual... cant find the effects module... But i have found the Control Unit in the distributor.. same thing?

Ok... the problem is coming back again... Ive purchased a bottle of Nuron injector cleaner to add to the fuel as a last resort... Im at my witts end guys, Im stumped! :rant:

Ok... Im at my witts end guys, Im stumped! :rant:

Funny you say that.......thats what my mechanic said as well, the real problem was never found, it does seem electrical - he had it connected up to all sorts of machines, and it was behaving exactly like an electrical problem........but nothing would fix it, mind you, I traded that car, and the car yard I traded it with palmed it off to another yard....who ultimately cashed in the redgo, and sold it as a wreck.........so its RIP to my old TP, it's sad to say i think you may need to say the same thing to your old girl, and move on to bigger and better magna's!!.....you should be able to get a reasonable price for 3 whole TP's!!!!

Funny you say that.......thats what my mechanic said as well, the real problem was never found, it does seem electrical - he had it connected up to all sorts of machines, and it was behaving exactly like an electrical problem........but nothing would fix it, mind you, I traded that car, and the car yard I traded it with palmed it off to another yard....who ultimately cashed in the redgo, and sold it as a wreck.........so its RIP to my old TP, it's sad to say i think you may need to say the same thing to your old girl, and move on to bigger and better magna's!!.....you should be able to get a reasonable price for 3 whole TP's!!!!

You had the same exact problem?

I just cant beleive that there is no way to fix this problem, I really do like my car and i dont want to give up and get rid of her.. Im sure it can be solved... just need to find the person that can do it :)

Im looking in the manual... cant find the effects module... But i have found the Control Unit in the distributor.. same thing?


Yes it would be the same thing. Has your fuel economy gotten worse as the problem gets worse

CAD, I really do hope you fix this problem, I beleive you are on the right track looking on the electrical side of it, I think if it was a fuel starvation problem, the car would at least miss a few times before completely cutting out, have you closly checked all wiring like power to the coil - could be broken inside the insulation, I have seen what can happen with wires where the inside is broken, but the insulation is fine - stumps people for ages...ohh, im not saying these people are dumb, it's just something easily overlooked

My problem wasnt quite like yours, mine only tended to cut out if it was idling or changing between gears, it would just stop dead like you turned off the key, but would fire up again a few seconds later, instantly, like nothing was wrong

Thanks for your replys guys.... I think... just think i may know what the prob is... Ive been told by a mech to test/replace the Throttle posisition sensor he's sure its a sensor prob... not 100% sure which one tho... best guess is that TPS :)
Ill replace it tonight and let ya's know how it goes :)

Thanks for your replys guys.... I think... just think i may know what the prob is... Ive been told by a mech to test/replace the Throttle posisition sensor he's sure its a sensor prob... not 100% sure which one tho... best guess is that TPS :)
Ill replace it tonight and let ya's know how it goes :)

Nope.. that didnt work either :(

It is EFI, Meaning that it would have to have a ECM, has your engine light come on??
When it cuts out is it more of a Splutter or a Straight out Cut out ??

We had a Similiar Problem in Our VN Commodore , it was Auto and their was some kind of Connection in the Gear box that stopped the Car starting if it was in Gear..
It would come on when it was in drive and turn the engine off.....

Worst case scenerio it is the ECM..


Fine Tooth comb and a little bit of money and We hunted it down and Fixed it..

Worst case scenerio it is the ECM..

It is EFI, Meaning that it would have to have a ECM, has your engine light come on??
When it cuts out is it more of a Splutter or a Straight out Cut out ??

We had a Similiar Problem in Our VN Commodore , it was Auto and their was some kind of Connection in the Gear box that stopped the Car starting if it was in Gear..
It would come on when it was in drive and turn the engine off.....

Worst case scenerio it is the ECM..


Fine Tooth comb and a little bit of money and We hunted it down and Fixed it..

Worst case scenerio it is the ECM..

No engine light...
Straight cut out..
Its manual :(

Thanks for your post :)

Ok.. since yesterday i have replaced:

ECI
Control Unit
Coolant Temp sensor
Air flow sensor
Atmospheric pressure sensor
Oxygen sensor

Tomorow i might replace all the fuel injectors and rail... anymore suggestions?

:(

Ok.. since yesterday i have replaced:

ECI
Control Unit
Coolant Temp sensor
Air flow sensor
Atmospheric pressure sensor
Oxygen sensor



:(

still got the same prob...

Seeing you have two spare cars, I would swap over the ignition leads, fixed a similar prob I had with a TS

Have you tryed the fuel pump?

I have swapped the leads over yes.... and the fuel pump has been replaced :(

I have swapped the leads over yes.... and the fuel pump has been replaced :(

Dam man, I feel for ya. Even after all these part replacments.. :confused:

try replacing the coil, if it is dodgy it will tend to fail under high revs when it heats up

Looks like ive found the problem... It was the ISC motor (Idle Speed Control) located on the throttle body... it was malfunctioning and randomly closing the throttle... it has been replaced... and hasnt cut out in over 100kms... so far so good!!! :P YAY!

I am curretnly expeiriencing the same symptoms with my TP... Did replacing the ISC motor solve your woes....?

I am curretnly expeiriencing the same symptoms with my TP... Did replacing the ISC motor solve your woes....?

Sure did! :)