Yet another adventure....... Peugeot 407 GT Coupe

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Trainman
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by Trainman »

I know, it was a good link you sent me, and I've enrolled in the forum, should be quite useful to Mark too.
bxzx16v
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by bxzx16v »

Mine misses a bit when cold but is perfect once warm. I've got the chance of a coilpack it's just getting over to pick it up. There's a few jobs to do but that'll be after the winter.

Mark
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by Trainman »

Hi Mark,

Got sent a link to here http://www.406coupeclub.org" onclick="window.open(this.href);return false; it's got some good stuff on it.....
bxzx16v
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by bxzx16v »

That's the forum I got my coupe off Steve, a great forum with plenty of info and guides on the coupe. Once the winter months are out of the way I'm wanting to replace all the shock absorbers and springs and while it's in bits check/replace anything worn or tired.

Mark
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Mandrake
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by Mandrake »

bxzx16v wrote:Mine misses a bit when cold but is perfect once warm. I've got the chance of a coilpack it's just getting over to pick it up. There's a few jobs to do but that'll be after the winter.

Mark
Unlikely to be the coil pack if it's bad when cold and ok when hot, ES9J4 coil packs usually either play up all the time or if temperature sensitive play up when hot.

My previous Xantia V6 had an intermittent single cylinder misfire when started cold that went away within 30 seconds and it definitely wasn't ignition related, as the entire ignition system was replaced...

Never did find out what it was before the car went but I suspect it was a sticking valve or a misbehaving hydraulic tappet or two as nearly every other possibility was ruled out.
bxzx16v
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by bxzx16v »

Thanks Simon I'll get it onto a diagnostic to see if that can throw anything up. It does run sweet when warm and will really get a shift on when needed.

Mark
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Mandrake
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by Mandrake »

I'll bet you anything you don't see any codes relating to misfires - I never saw any on mine even with a severe misfire. The ECU is too primitive to detect misfires.

Has it had an oil change, and if so what kind ? Both sticky valves and misbehaving hydraulic tappets may improve with a good change of synthetic oil... (10w40 IMHO, I wouldn't use anything thinner)
Trainman
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by Trainman »

Mandrake wrote:I'll bet you anything you don't see any codes relating to misfires - I never saw any on mine even with a severe misfire. The ECU is too primitive to detect misfires.
I'm going to presume then that the ecumenical in the later 407 is different as Peugeot Planet definitely show a misfire ( pictures tomorrow).
bxzx16v
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by bxzx16v »

It had a service at Peugeot earlier this year Simon, I'll have to check the bill/history to see what oil was used.

Mark
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by KP »

Why not use some nice fully synth 5w40 or 0w40? If it's fully synth and in an lpg car it will be stayng very clean compared to most oils and the thinner cold grade is better for cold startup as well :)
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Mandrake
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by Mandrake »

Trainman wrote:
Mandrake wrote:I'll bet you anything you don't see any codes relating to misfires - I never saw any on mine even with a severe misfire. The ECU is too primitive to detect misfires.
I'm going to presume then that the ecumenical in the later 407 is different as Peugeot Planet definitely show a misfire ( pictures tomorrow).
Yep.

The ES9J4S ECU has a misfire monitor, the ES9J4 does not.

One reason why is the ES9J4 has no cam sensor, so it doesn't know which cylinder (out of a pair) is firing or not firing as the case may be - injectors and spark plugs are fired in pairs.

An ES9J4S fires injectors and spark plugs individually and does have a cam sensor thus is capable of narrowing down a misfire to a single cylinder.

PS I'm assuming Marks 406 is a D8 with the earlier ES9J4 in it like the Xantia.
Last edited by Mandrake on 18 Oct 2014, 23:49, edited 1 time in total.
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Mandrake
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by Mandrake »

KP wrote:Why not use some nice fully synth 5w40 or 0w40? If it's fully synth and in an lpg car it will be stayng very clean compared to most oils and the thinner cold grade is better for cold startup as well :)
Too thin an oil leaks past worn leaky hydraulic tappets too easily preventing them from pumping up.

I actually put some 10w50 synth in that car as a last ditch measure for the valve gear issues about two months before I sold it - I think it was actually starting to help too...
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DHallworth
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by DHallworth »

I've read that mixing semi and fully synthetic oil can cause problems as well. Be worth doing several change in quick succession if going from semi to fully synthetic.
bxzx16v
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by bxzx16v »

It is the earlier D8 Simon, last serviced 7/2/14 at 95664, it's just done over 1k since. It has been serviced using 10/40 semi synthetic for a good while now.

Mark
bxzx16v
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Re: Yet another adventure....... Peugeot 407 GT Coupe

Post by bxzx16v »

It's been on semi synthetic for a good while too, I will leave it at that for the time being. I had a Renault 25 V6 turbo years ago and that was on fully synthetic, it used to drip oil like no one's business.

Mark