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440 -95 B18U Problems with cold start + bad idle

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1986 - 1997 440
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Quickie2
Posts: 28
Joined: Thu Feb 19, 2009 2:22 pm
Year and Model: 440 -95 B18U
Location: Sweden

Re: 440 -95 B18U Problems with cold start + bad idle

Post by Quickie2 » Fri Mar 06, 2009 5:47 am

Ok, I've been checking for vacuum leaks before and I've replaced all connections I could find without result. The only pipe connected to the brake servo is a 2cm tube made of plastic bent like a bow.

I found this on another forum:

"There are two black plastic pipes which come over the brake resevoir and join the back of the inlet assembly using short braid covered pipes. I have these were perished and I have replaced them. Things look OK, but it is early days yet. Note that one of these pipes has a small brass restrictor in it, so don't throw away!!."

I don't know which pipes this guy means, is there any documentation/pictures on the vacuum lines for the B18U engine?

Quickie2
Posts: 28
Joined: Thu Feb 19, 2009 2:22 pm
Year and Model: 440 -95 B18U
Location: Sweden

Re: 440 -95 B18U Problems with cold start + bad idle

Post by Quickie2 » Fri Mar 06, 2009 5:50 am

PS! I have ordered a tps from a junkyard and I'm longing to fit it on my engine to see if there is any improvements :P DS!

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billofdurham
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Year and Model: 855, 1995
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Re: 440 -95 B18U Problems with cold start + bad idle

Post by billofdurham » Sat Mar 07, 2009 12:47 pm

I can't find a vacuum diagram for your car so, at this time, I can't help with this one.

Bill.
Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

Quickie2
Posts: 28
Joined: Thu Feb 19, 2009 2:22 pm
Year and Model: 440 -95 B18U
Location: Sweden

Re: 440 -95 B18U Problems with cold start + bad idle

Post by Quickie2 » Mon Mar 30, 2009 5:38 am

I haven't found any vacuum leaqks, even tried with carburator cleaner without any luck :x . But,from inside the car I can hear a sucking sound first second when I push down the throttle. Can a bad inlet manifold gasket appear as a vacuum leak? Since I've noticed the engine stabilizes If I repeatadly push down the breakpedal?

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billofdurham
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Re: 440 -95 B18U Problems with cold start + bad idle

Post by billofdurham » Wed Apr 01, 2009 3:23 pm

I haven't been ignoring this, I have been doing some research.

A bad inlet manifold gasket, unless there was a large piece missing, shouldn't make a noise that you could hear in the car. However, there is a vacuum pipe from the intake manifold to the brake servo (booster) unit. As the engine stabilizes when you repeatedly press the brake pedal it is possible that you have a leak in that pipe or at one of its ends. Have you checked this one?

Bill.
Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

Quickie2
Posts: 28
Joined: Thu Feb 19, 2009 2:22 pm
Year and Model: 440 -95 B18U
Location: Sweden

Re: 440 -95 B18U Problems with cold start + bad idle

Post by Quickie2 » Thu Apr 02, 2009 8:19 am

I was afraid you guys were leaving me alone with this problem=) I really appreciate your help.

I have tried to check this pipe actually, spraying some carburattor cleaner and I didn't notice anything. I'm thinking of replacing It but I can't see how I can detach It from the booster unit?

Bu If I understand It right the vacuum is created in the intake manifold and If the manifold gasket is bad I would have a vacuum leak, right? or am way of?

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billofdurham
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Joined: Thu Feb 02, 2006 3:31 pm
Year and Model: 855, 1995
Location: Durham, England
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Re: 440 -95 B18U Problems with cold start + bad idle

Post by billofdurham » Thu Apr 02, 2009 3:21 pm

I was afraid you guys were leaving me alone with this problem
As if we would. :roll:

The vacuum pipe is attached to a non-return valve at the servo unit. The non-return valve just pulls out.

You are right about the vacuum being created in the intake manifold but I don't know if it would make a loud enough noise to be heard inside the car.

Have you sprayed the carb cleaner on the intake manifold gasket to check for a leak there?

Bill.
Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

Quickie2
Posts: 28
Joined: Thu Feb 19, 2009 2:22 pm
Year and Model: 440 -95 B18U
Location: Sweden

Re: 440 -95 B18U Problems with cold start + bad idle

Post by Quickie2 » Sun Apr 05, 2009 11:52 am

I removed this brake vacuum pipe from it's connection on the manifold and put my finger over the connection. No improvement was observed :( meaning the pipe is OK. :)

I guess I have no choice now exept for replacing my inlet manifold/exhaust gasket. As I read on other forums I'ts a pretty common failure on the B18U engines. I've decided to do the job myself and I will start as soon as I get the new gasket. Is there anything else I can replace at the same time? :D

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billofdurham
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Re: 440 -95 B18U Problems with cold start + bad idle

Post by billofdurham » Sun Apr 05, 2009 3:46 pm

It is a common failure point. I can't think of anything else to replace but would advise you to give the bolts a good soaking with releasing oil as they will be rusted and extremely tight. If any snap you will need to remove the head and have them taken out at a machine shop.

WD40 is good but if you can get your hands on some PlusGas formula A it is the best.

Bill.
Work was good - retirement is better.

1996 850GLT 2.5 20v Estate Manual.
1995 Peugeot Boxer 2.5Tdi Autosleeper.
Previously:
1984 244DL, Manual, Beige.
1987 744GLE, Manual, Green.
1991 960 3.0 24v, Auto, Silver.
1994 940T Wentworth, Auto, Blue.

Quickie2
Posts: 28
Joined: Thu Feb 19, 2009 2:22 pm
Year and Model: 440 -95 B18U
Location: Sweden

Re: 440 -95 B18U Problems with cold start + bad idle

Post by Quickie2 » Tue Apr 14, 2009 2:51 am

As I wrote in the other post I replaced the inlet manifold gasket and the engine still runs like a bag of nuts :evil:
Any last suggestions? :?

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