AJP8 No Start after Top End Rebuild

[ukkid35]

HarryW said:

I once had an issue with the Molded plug to one of the coil packs, an internal core had come loose at the pack end after removing and refitting. Swing through the control wires between the pack plug and the ECU. That said I think mine wasn't firing as opposed to mistimed firing.

If I put the spark tester on every plug then I should be able to rule that out.

[ukkid35]

HarryW said:

Another point, is it possible to have the wrong control plug on the wrong coil pack?

That was my first question, but CerbWill confirmed my wiring, as did the 'set' in the loom anyway.

[ukkid35]

Anyone who wants to pop over and help me diagnose the issue is welcome - drinks and curry at my favourite Indian Restaurant afterwards is on me. I'm near the Ace Cafe.

[HarryW]

Thread here with photos showing the connector and potential wires falling out issues with it, worth a look as you've been in this area if only to eliminate.

http://www.pistonheads.com/gassing/topic.asp?t=141...

[jammy_basturd]

ukkid35 said:

HarryW said:

Another point, is it possible to have the wrong control plug on the wrong coil pack?

That was my first question, but CerbWill confirmed my wiring, as did the 'set' in the loom anyway.

Could be worth swapping them over just as a sanity check anyway?

From experience, trying to think... Check battery connections are on tight, had starting issues when one of the wires had practically worked its way out of the connector on to the battery. I guess the same applies to the earth (you say you've already checked that though), big fuse...

Lastly, check ignition plugs and ECU plug for water ingress.

[Jhonno]

Short of bent valves, it does sound like timing to me..

[fatjon]

Set it with No1 as near as you can to TDC and create some tippex timing marks on the crank pulley and front case. Crank it with a strobe on number 1 plug lead and see if you have somewhere approaching 10-15 degrees of advance while cranking. The static tippex marks should be visible with a well charged battery to get a good crank speed and a darkish place to do the test. Accuracy is not really an issue as if it's within a quite large margin it will start and run but if its 75 or 105 degrees out you have a clue. If it's not flashing at all you have a bigger clue.

You can also do the same with number 2 cylinder but of course it will need it's own timing marks as the engine is odd fire by 15 degrees.



That would be my approach, after being very sure about the cam timing which is all too easy to mess up on an odd fire engine.

[fatjon]

ukkid35 said:

jammy_basturd said:

Definitely got the timing chain/cams timed correctly?

I marked the cams before removal so I know they are perfect relative to each other. Could I have the crank 180 deg out, I don't think so, I followed the manual fastidiously.

The most basic crank/cam check is to advance the crank to TDC on cylinder 1 and check that either both valves are closed, ie compression stroke or it's on overlap ie end of exhaust stroke about to start induction both valves slightly off the seat. If the cam is in either of these positions with the piston at BDC you have made a 180 degree timing mistake.

Of course this test does not mean the timing is cock on, just a sanity check that it's not 180 degrees out.

Best checked with a cylinder on each bank BTW.

[scotty_d]

A different angle here from personal experience, when I had it in bits and could not get it started as well.

Mine ran fine, took it off the road, engine in bits and would not start but trying like yours.

My injectors had gummed up and 2 were more or less doing nothing, a full clean and the car burst in to life when re fitted, it appears they don't like lying for periods.

A quick check to see what cylinders were spraying fuel before I decided to go get them cleaned and flowed.

[gruffalo]

Paul,

Did you get her going in time for the Ring trip?

[ukkid35]

gruffalo said:

Paul,

Did you get her going in time for the Ring trip?

Sadly not, so this was my view instead



As you can see the weather was perfect, and on the Friday we hired MTBs and cycled round the forest track that follows the circuit while watching the VLN practice, great fun! (although the uphill section from Adenau to Hohe Acte was really hard)



The AJP8 soundtrack is pretty good, but an SLS is mobile thunder - just awesome!

[ukkid35]

Here's 9 seconds of SLS GT3 going past

http://vimeo.com/141836039

[ukkid35]

And this is the last time I drove my Cerbera (other than the run home a couple of days later).

It's not a great lap, quite a few little errors, as it was getting towards the end of the day and I was losing concentration. The worst is when I hit the kerb on the bridge at Adenau (Breidscheid), that's when I knew I had to call it a day.

http://vimeo.com/141834253

[DuncanM]

ukkid35 said:

And this is the last time I drove my Cerbera (other than the run home a couple of days later).

It's not a great lap, quite a few little errors, as it was getting towards the end of the day and I was losing concentration. The worst is when I hit the kerb on the bridge at Adenau (Breidscheid), that's when I knew I had to call it a day.

http://vimeo.com/141834253

Wow! Absolutely loved that, thanks for posting

You're not hanging around are you?

[Jhonno]

ukkid35 said:

And this is the last time I drove my Cerbera (other than the run home a couple of days later).

It's not a great lap, quite a few little errors, as it was getting towards the end of the day and I was losing concentration. The worst is when I hit the kerb on the bridge at Adenau (Breidscheid), that's when I knew I had to call it a day.

http://vimeo.com/141834253

It's funny how no car seems quick round the 'Ring in a video.. Even when you are there the track seems to swallow the sense of speed!

[HarryW]

Jhonno said:

ukkid35 said:

And this is the last time I drove my Cerbera (other than the run home a couple of days later).

It's not a great lap, quite a few little errors, as it was getting towards the end of the day and I was losing concentration. The worst is when I hit the kerb on the bridge at Adenau (Breidscheid), that's when I knew I had to call it a day.

http://vimeo.com/141834253

It's funny how no car seems quick round the 'Ring in a video.. Even when you are there the track seems to swallow the sense of speed!

Oh I don't know there was a few times there when I didn't know what was around the corner and thought, feck he's brave going in at that speed. Good vid.

[Jhonno]

HarryW said:

Jhonno said:

ukkid35 said:

And this is the last time I drove my Cerbera (other than the run home a couple of days later).

It's not a great lap, quite a few little errors, as it was getting towards the end of the day and I was losing concentration. The worst is when I hit the kerb on the bridge at Adenau (Breidscheid), that's when I knew I had to call it a day.

http://vimeo.com/141834253

It's funny how no car seems quick round the 'Ring in a video.. Even when you are there the track seems to swallow the sense of speed!

Oh I don't know there was a few times there when I didn't know what was around the corner and thought, feck he's brave going in at that speed. Good vid.

When you know what is coming/been there it is different though.. The fact Paul appears quite smooth as well doesn't help the sense of speed.

[ukkid35]

Jhonno said:

When you know what is coming/been there it is different though.. The fact Paul appears quite smooth as well doesn't help the sense of speed.

Damning with faint praise...

[Jhonno]

ukkid35 said:

Jhonno said:

When you know what is coming/been there it is different though.. The fact Paul appears quite smooth as well doesn't help the sense of speed.

Damning with faint praise...

"I'm not slow, I am smooth"

[ukkid35]

First day working on the car since September, and still none the wiser.

Started by replacing a number of Jubilee clips with Mikalor, before refilling and bleeding the cooling system. Then I pulled the plugs and did a compression test, I had a heart stopping moment when the first came out at 150, before realising that I'd not opened the throttle. These are engine cold (obviously) and with no additional oil in the cylinders (which I had added for my original test four years ago).

1 - 220
3 - 230
5 - 230
7 - 245

2 - 220
4 - 220
6 - 225
8 - 215

So all good, and fairly even too, so I can't see how the cam timing could possibly stop the engine from firing, which it hasn't done once.

My assistant had time to press the start button while I checked that all injectors were doing their thing, but not enough time for me to check for a spark at each cylinder. That will happen tomorrow, however 1 and 2 are already confirmed.

How can I check whether the spark is near TDC?

Nevertheless, I have compression, so I can at least relax a little.