4G63 question

[Subaru ETA]

I hate cars. I have replaced the leads and it is still doing it! It must be the coil packs.... They gave been tested by 3 different people (myself, an auto sparky and Andrew Simms mitsubishi newmarket) and they test fine.

Think I'm going to take it into Andrew Simms Henderson tomorrow and get them to look at it as I don't have the time to do it! I'm suppose to be preparing training material and presentations on the mitsi electric car for our roadside mechanics! Don't have time for this archaic internal combustion stuff

[Subaru ETA]

Car has been at Andrew Simms Henderson since Monday. They thought they had it fixed, but when he started it this morning it was running on 3 again.

This morning he got it to surge on the motorway - it feels like fuel cut, but happens at light throttle. The guy working on it is the foreman and is really good. He is at a training course tomorrow so if going to run it past the head technical guy who knows everything Mitsi and see what they come up with.

When he rang this morning i was worried about what the bill was going to look like! but they aent charging me for the diagnostics which is awesome!

I would rank the service at Henderson better then at Newmarket. Yes Newmarket has the big flash dealership, but it has big dealeship mentality - get as much work in and out as possiable. I know what this is like working for a big franchise dealer like i used to

[miller]

Maybe the MAF is on its last legs? My old Evo which I replaced the MAF in had intermittent faults when it was hot?

If the EGR or o2 sensor was on its way out they would throw a CEL.

[Subaru ETA]

This has issues when hot and cold. They have checked the maf and reckon it's all good but its a possibility.

EGR system is all good and O2 sensor is fine. O2 sensor want always throw a code (well in the cars I worked on - ford and Mazda it didn't!)

[BEG4ME]

Maybe those dudes out there with the AECS Scope machines? (something like that) would be able to find the problem. We get Radiator magazine every month at work, and some of the faults they come up with are wicked aye, but always solved.

[exevoowner]

there are a few issues with these engines that can cause missfires one being valve seats that can allow passing wrong coded plugs or heat range also try cam and crank senors or even the disc on the crank for the crank senors long shot but worth a try have you run the exhaust gases test could be rich ?

[Subaru ETA]

The plugs are defiantly the right ones. Cam and crank sensor would give a code surely?

[Subaru ETA]

got the car back. they found a split vaccum hose at the back of the engine, which they replaced. they were unable to get it to fault again so it is a case of wait and see.

i was thinking, if this hasnt fixed it, would a dodgy BOV give the same issue? it is running the factory one which is the same as the vr4

[Subaru ETA]

****en thing! It won't idle now

[exevoowner]

you could try cleaning the throttle body as they foul up

[Subaru ETA]

You could eat off the inside of the throttle body it is so clean! I cleaned it and so did mitsi, along with the stepper motor.

Wife drove it yesterday and it did it when it was warm. I drove roughly 20km parked it for three hours and then another 20km home and it was fine. This morning I drove it to work, stopped at intersections etc and it was fine. Stopped to swipe into the carpark and it stalled. Now it's idling at just under 500rpm. Took it out 1.5 hours later to get a pie and it was doing the same....

Still think it could poss be the BOV as it does seem to be getting louder

[scott.mohekey]

Have you tried resetting the ECU? It may need to relearn its idle after having fixed the vacuum leak.

[Subaru ETA]

I did think of doing that when I get home. However I would have thought it would be doing it all the time

[scott.mohekey]

It sounds like its doing it once it's heated up, and I'm pretty sure the idle calculations are different once the coolant has reached operating temperature.

[Subaru ETA]

Good point. I'll give it a go at my lunch break

[Subaru ETA]

An update - idle problem fixed. Dead cell in battery. It was loosing power under load and dropping it low enough for it to loose it's idle setting.

I have driven roughly 4000km in the last 7 days (touring the south island). It has been fine the whole time until the drive from Invercargill to Dunedin today. It's surging alot and had it's "miss" a couple of times going up hills. I shut it down in belclutha and started it straight back up and it purred like a kitten until I got off the motorway at Mosgiel, it surged and miss quite bad. Got it to one of our roadside mechanics we use at work and he ran a scan over it. It was hunting a little at idle but everything was looking ok on the data log. Once again no codes.

I'm starting to think it has a ECU issue

[scott.mohekey]

That is VERY weird. Loose connection somewhere maybe?

[Subaru ETA]

Myself and 2 Mitsubishi dealers have gone through every bloody connection and cleaned then and made sure they are secure.

When we get back to Auckland it will go back to the dealer one more time. If they can't fix it I'll be trading it for an outlander. I love the style of the car and the seating position and height of the car are really good for my stuffed back and knee. The wife has spoken and wants a outlander so who am I to argue lol

[Subaru ETA]

well its back at the dealer again. they cant work it out. they have opened the ecu and cant see anything obvious wrong with it. They are now thinking injectors. Only thing is is that they dont really want to remove them and get them flow tested etc as they dont know if that is the problem! Doesnt help when it is running perfectly fine at the moment.

I have told them they can have it for the week....

[taylor]

Does it have a 3 or four plug ecu?

I Have coil plugs / Leads / AFM you can try if you like, although the mitsi dealer probably does aswell

Few other things I can think of:

Resistor pack having a dry join inside it: has been known to have similar traits on the evos

Fuel resistor / relay

Theres a relay that kicks down the pump through a resistor, if the resistors not connected/ faulty itl run like a bag of ****

If you can get it to sit there running crap, pull the afm plug and force it into limp and see if idles