Advice please - EJ25 cutting out issue.

[donnyburger]

Good afternoon all.

I'm having an issue I'm currently trying to sort a problem out on my ('97 auto) EJ25-powered camper that I've driven around for the last 2 1/2 years!

In short, it cuts out intermittently at junctions and has done since I bought it. 

I have been in touch with RJES yesterday, and we found that there was a slight issue with the wiring harness which meant the VSS and check engine light (LED) weren't getting power. This has since been corrected. After that, I disconnected the Battery last night and left it until this morning to reset the ECU. 

I've taken it for a drive today, and...no change! I have checked the feed to the VSS which goes from 0v to 12v when ignition is turned to 1, so there's no issue there. I plugged the 2 black diagnostic ports together, turned the ignition to 1 and I got a blink code of 33 - VSS again.

Since then, I have just found one of the small vacuum pipe that goes from here -

to here - 

had a very small hole in it, which I have just sorted by shortening it slightly - 

Now, I've disconnected the Battery again, and I'm of the understanding that I need to leave this overnight to reset it completely. Before I did this, the engine LED still showed me the '33' VSS code which really has me baffled!

EDIT - I've just read that I might have to the the Battery disconnected for 24 hours. This isn't an issue really, just an inconvenience. 

Can anyone help?! Please!

 

[stants]

Hello,

You don't need to leave it for 2r hours, just press the brake pedal till the lamps die that will drain all residual power then just leave 20 mins,

What gearbox have you got mated to ? The vss is probably to do with it not reading a correct signal from the box or a fault with the wiring in the speedo

Sent from my SM-G930F using Tapatalk

[donnyburger]

5 minutes ago, stants said:

Hello,

You don't need to leave it for 2r hours, just press the brake pedal till the lamps die that will drain all residual power then just leave 20 mins,

What gearbox have you got mated to ? The vss is probably to do with it not reading a correct signal from the box or a fault with the wiring in the speedo

Sent from my SM-G930F using Tapatalk

OK, I'll give that a go and see what happens.

It's mated to the VW AAP gearbox that the bus came with. 

The reason I'm trying to sort this is that it vetoed the bus selling yesterday and has put my next (deposited) purchase under threat.

[stants]

What clocks is it all mated to ? May be throwing a wobbler at the at end too

Sent from my SM-G930F using Tapatalk

[donnyburger]

To the original clocks, which read correctly (compared to sat-nav)

It's a very common conversion.

I've also been told that there's a chance that it could be the idle control valve, which is a fiddly, careful job to do?

[donnyburger]

I've also just given the idle control valve about a 1/4 can of carb cleaner in where the hose connects.

Hopefully that'll help.

[donnyburger]

...aaaaaaaannnnnddddd that's made no difference!

Now the LED is a constant blink. Neither the long or short flashes usually described by the index.

*runs of to google*

[stants]

Constant blink means no fault codes stored

Sent from my SM-G930F using Tapatalk

[donnyburger]

12 minutes ago, stants said:

Constant blink means no fault codes stored

Sent from my SM-G930F using Tapatalk

Understood.

Guess I'll be removing the idle air control valve tomorrow and cleaning it up. Seems it could be what's causing my issue. 

Thanks. :)

[savage bulldogs]

Constant blink means no fault codes stored

Sent from my SM-G930F using Tapatalk

Understood.

Guess I'll be removing the idle air control valve tomorrow and cleaning it up. Seems it could be what's causing my issue. 

Thanks. :)

If you do remove the icv make sure you don't undo the adjustment screws on the top without marking the original position first [emoji6]

If it's not broke .....upgrade it 😊

[donnyburger]

Just to bring this to a conclusion, it appears we are all now well and good.

No stalling at junctions, no engine LED warning lights.

Thanks to all involved, in short it was a combination of the wiring error and a filthy IACV which was removed, cleaned up with carb cleaner and cotton buds and re-installed along with another little vaccum leak I found, then a final ECU reset.

:)

[stants]

Excellent news !

Sent from my SM-G930F using Tapatalk