MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: Pesky jones on May 07, 2015, 08:06:12 am

Title: ticking over
Post by: Pesky jones on May 07, 2015, 08:06:12 am
So yesterday I changed my cam follower and PCV.

after I'd finished I started the car up and it did a weird stutery tick over for what felt like ages but was probably a few seconds before starting up. Now, I thought it was because I'd obviously disconnected the fuel lines to the fuel pump and maybe was to be expected. I turned the car off and on again and it started first time. So I thought nothing of it.

This morning however I thought it would have started first time because the fuel would be in the pipes from last night when the engine was running etc. It did the same ticking over before starting.

My first thought was the banjo bolt, it has a small hole running through the centre of the bolt to let the fuel through. Could this be missaligned so fuel is struggling to get through?

Or perhaps the other fuel line is done up to tightly?

Any thoughts?
Title: Re: error po688 and ticking over
Post by: dazza on May 07, 2015, 08:51:50 am
Check the pump connector. Also check the battery ground.
Title: Re: error po688 and ticking over
Post by: Pesky jones on May 07, 2015, 09:03:23 am
I don't know what either of those are!
Title: Re: error po688 and ticking over
Post by: Kiwi on May 07, 2015, 09:10:58 am
17072/P0688/001672 - ECM Power Relay Load Circuit: (J271): Open Circuit

Possible Symptoms
Engine Coolant Fan running at full Speed while Ignition is OFF and Engine is COLD (could lead to discharged Battery)

Possible Causes
Fuse(s) faulty
Power Supply Relay for Engine Control Module (J271) faulty
Terminal 87 faulty/hanging
Wiring between Engine Control Module (J220) and Power Supply Relay for Engine Control Module (J271) faulty

Possible Solutions
Check/Replace Power Supply Relay for Engine Control Module (J271)
Check Wiring between Engine Control Module (J220) and Power Supply Relay for Engine Control Module (J271)
Check/Replace Engine Control Module (J220)
Title: Re: error po688 and ticking over
Post by: dazza on May 07, 2015, 09:21:26 am
Check the pump connector. Also check the battery ground.
On top of the fuel pump the connector where the wire plugs in.
This could be an issue with the battery so check you have reconnected it ok.
Title: Re: error po688 and ticking over
Post by: Pesky jones on May 07, 2015, 09:32:51 am
Ok I'll check that connection.

Anything to check on the battery? I removed fuse 25 before I started, but I did put it back.
Title: Re: error po688 and ticking over
Post by: dazza on May 07, 2015, 09:34:46 am
Ok I'll check that connection.

Anything to check on the battery? I removed fuse 25 before I started, but I did put it back.
This is probably the problem. check the fuse. in future disconnect the battery don't touch the fuses.
Title: Re: error po688 and ticking over
Post by: Pesky jones on May 07, 2015, 09:44:54 am
Ok cheers dazz will do.
Title: Re: error po688 and ticking over
Post by: dazza on May 07, 2015, 09:57:53 am
I really don't know. You shouldn't have had this problem after changing the cam follower.

But look at the post from Kiwi the first Possible Causes - Fuse(s) faulty

Can you hear the pump prime when you open the drivers door?
When i started mine up. I turned the key to the on position but did not start it left it for 10 seconds. Repeated this a few times.
Title: Re: error po688 and ticking over
Post by: Pesky jones on May 07, 2015, 10:10:27 am
Hopefully just a fuse...

I didn't prime it, just went straight to turning it on. Even if priming it does work now, I don't want to do it every time!

Title: Re: error po688 and ticking over
Post by: dazza on May 07, 2015, 10:15:55 am
If i were you i would not drive it until i sort this code out which will probably sort the start problem.
Title: Re: error po688 and ticking over
Post by: Pesky jones on May 07, 2015, 10:19:55 am
I've already driven to uni today so I'l have to drive home again, and ive got to drive to Wales tonight! I'll check the fuses at lunch and hopefully that will sort the code out.
Title: Re: error po688 and ticking over
Post by: dazza on May 07, 2015, 10:31:04 am
unless it was a temporary error caused by you pulling the fuse. Try clearing the error.
Title: Re: error po688 and ticking over
Post by: Pesky jones on May 11, 2015, 03:04:54 pm
It seems to be starting up OK now, there's still around a second of ticking over before engine kicks in but I'm pretty sure that was the same as before.

Just wondering, is it not possible to accidentally get the banjo bolt aligned so that no fuel can get through?