STD Tuning Engine injection noise/nailing

injection noise/nailing

injection noise/nailing

 
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willbhere4u
Six in a row make her go!

2,507
05-03-2010, 09:27 PM #1
So my 240d turbo is nailing badly at idle when hot!

It has been getting worse to night I replace some collapsed leaking fuel supply line and filters and it stopped nailing almost completely!

So I thought I would crack each injector to listen for any noise! If I crack cylinders 1,2,4 the car will slow down and Nail really badly! If i crack # 3 it slows down but no noise nailing

If the engine drops even slightly below idle it starts nailing really badly on #3

I'm going to swap injectors this weakened and see if the problem follows the injector or if it stay my guess is a weak injection pump.

As rebuilding the injectors and doing a valve adjustment hasn't changed it

1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
05-03-2010, 09:27 PM #1

So my 240d turbo is nailing badly at idle when hot!

It has been getting worse to night I replace some collapsed leaking fuel supply line and filters and it stopped nailing almost completely!

So I thought I would crack each injector to listen for any noise! If I crack cylinders 1,2,4 the car will slow down and Nail really badly! If i crack # 3 it slows down but no noise nailing

If the engine drops even slightly below idle it starts nailing really badly on #3

I'm going to swap injectors this weakened and see if the problem follows the injector or if it stay my guess is a weak injection pump.

As rebuilding the injectors and doing a valve adjustment hasn't changed it


1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running

dude99
TA 0301

64
05-03-2010, 09:54 PM #2
Have you checked the the IP timing?
dude99
05-03-2010, 09:54 PM #2

Have you checked the the IP timing?

willbhere4u
Six in a row make her go!

2,507
05-03-2010, 10:02 PM #3
Not yet I was thinking of setting it at 26* like the turbo cars are! But its only that one cylinder that nails!

1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
05-03-2010, 10:02 PM #3

Not yet I was thinking of setting it at 26* like the turbo cars are! But its only that one cylinder that nails!


1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running

Alastair E
Moderator?--Nah...

266
05-04-2010, 01:39 PM #4
Quite possibly the Injectors are as old as the car....

Like 30 Years old!

Prolly could well do with replacing the nozzles and re-setting up....

No point on earth in just cleaning Old Injectors.....
Alastair E
05-04-2010, 01:39 PM #4

Quite possibly the Injectors are as old as the car....

Like 30 Years old!

Prolly could well do with replacing the nozzles and re-setting up....

No point on earth in just cleaning Old Injectors.....

willbhere4u
Six in a row make her go!

2,507
05-04-2010, 08:42 PM #5
They are rebuilt as previously stated? They maybe have 2500k on them since I rebuilt them! and it nailed before then as well

This weak end I'm going to swap the known nailing cylinder's injector to figure out if its the Injection pump of the injector!

If the nailing changes cylinders its the injector! if it stays it's not the injector!

1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
05-04-2010, 08:42 PM #5

They are rebuilt as previously stated? They maybe have 2500k on them since I rebuilt them! and it nailed before then as well

This weak end I'm going to swap the known nailing cylinder's injector to figure out if its the Injection pump of the injector!

If the nailing changes cylinders its the injector! if it stays it's not the injector!


1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running

tomnik
Holset

587
05-05-2010, 06:37 AM #6
check the ball in the pre chamber while the injector is out.

Tom
tomnik
05-05-2010, 06:37 AM #6

check the ball in the pre chamber while the injector is out.

Tom

willbhere4u
Six in a row make her go!

2,507
05-05-2010, 11:48 AM #7
What should I look for? Dose it come out?

1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
05-05-2010, 11:48 AM #7

What should I look for? Dose it come out?


1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running

tomnik
Holset

587
05-05-2010, 02:57 PM #8
look into the pre chamber with a torch and check if the ball inside is still there. Sometimes it happened that the ball is blown/melted/broken away and this will cause also nailing on one single cylinder.

Tom

(05-05-2010, 11:48 AM)willbhere4u What should I look for? Dose it come out?
tomnik
05-05-2010, 02:57 PM #8

look into the pre chamber with a torch and check if the ball inside is still there. Sometimes it happened that the ball is blown/melted/broken away and this will cause also nailing on one single cylinder.

Tom

(05-05-2010, 11:48 AM)willbhere4u What should I look for? Dose it come out?

willbhere4u
Six in a row make her go!

2,507
05-05-2010, 05:28 PM #9
Thanks I will do that! Since I'm in the U.S. I'll use a flash light to be safe side LOL Tongue
This post was last modified: 05-05-2010, 05:28 PM by willbhere4u.

1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
05-05-2010, 05:28 PM #9

Thanks I will do that! Since I'm in the U.S. I'll use a flash light to be safe side LOL Tongue


1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running

Einar
GT2256V

118
05-07-2010, 01:37 AM #10
Also check the pressure-pipe(?) between the pump & injector, if it`s damaged it may disturb the injection. I don`t know if it may cause nailing, but I would check it.
Einar
05-07-2010, 01:37 AM #10

Also check the pressure-pipe(?) between the pump & injector, if it`s damaged it may disturb the injection. I don`t know if it may cause nailing, but I would check it.

willbhere4u
Six in a row make her go!

2,507
05-07-2010, 09:14 AM #11
That's a good idea I'll check it out closely when it's off

1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running
willbhere4u
05-07-2010, 09:14 AM #11

That's a good idea I'll check it out closely when it's off


1987 300SDL 6spd manual om606.962 swap project
1985 300td euro 5spd wagon running

 
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