Long crank rough idle Euro III D5 53 plate

barkl0r · May 6th, 2014, 11:03

Hi all,

Here's where I'm at:

Cranking 5-10 seconds. Rough idle at start 75% of time. Clears up when engine warms. Sometimes after a run I'd go to start after 5 Mins off and lumpy but on a hot engine.

Here's the rub:

It seemed to correspond with using redex diesel. I bought this on a whim. Is it possible this is the cause or is this coincidence?

I'm going to run it near empty and fill up, and monitor next week.

Sounds like an injector is on the way out. There's a lot of oil around injector 3...

Kindly
Mike

cheshired5 · May 6th, 2014, 12:43

Injectors carry diesel, so if you have oil, maybe your rocker cover gasket is on its way out. You need to clean the area and monitor it regularly to find the source.
There's a chance that Redex has dislodged crud in your fuel tank and your fuel filter is now pretty blocked, restricting fuel flow for smooth starting and running.
Fortunately, this is one of the cheaper and easier jobs to do and a good starting point. You may get lucky.

skyship007 · May 6th, 2014, 13:11

If you put a fuel additive in the tank it can free up so much crud that it blocks the fuel filter. So I would start by checking the fuel filter and seals first.

If you have been using cheap diesel and the fuel filter is good, then try using Liqui Moly diesel purge. Just drain the fuel filter and top up. It's a very effective direct feed injection cleaner.

If it's not the filter or a gummed up injector, then it's time to get the codes read. Top of the list would be MAF sensor, which can be checked by seeing if disconnecting it improves the performance.

Some diesels don't start too well when cold if the glow plugs are kaput. It's easy to check them, as the resistance across one should only be a few ohms and a broken one will be near open circuit at several K.

JohnL · May 6th, 2014, 14:06

To be sure you need to do an injector leak off test to find which one is faulty. It need only be one. That will usually cause long cranking time, It could also be the pump in the tank that feeds the fuel thru to the front, but pehaps not if it runs ok after its started.
The engine breather pipe is close to injector 2, worth a check its not that leaking.
John

JohnL · May 6th, 2014, 15:13

To be sure you need to do an injector leak off test to find which one is faulty. It need only be one. That will usually cause long cranking time, It could also be the pump in the tank that feeds the fuel thru to the front, but pehaps not if it runs ok after its started.
The engine breather pipe is close to injector 2, worth a check its not that leaking.
John

barkl0r · May 6th, 2014, 17:42

I'll clean the rocker cover etc... Monitor the oil/black mess and do a leak off test and replace filter.

Car runs good when it's normal so I bet the tank pump is OK and the maf is OK but if the above doesn't help I'll be sure to investigate these.

Currently got 10w40 oil. Normally 5w40 used. Changed every 6-8k.

Thanks guys!

May 6th, 2014, 11:03	#1
barkl0r New Member Last Online: Nov 8th, 2014 10:19 Join Date: Mar 2013 Location: Carrickfergus	Long crank rough idle Euro III D5 53 plate Hi all, Here's where I'm at: Cranking 5-10 seconds. Rough idle at start 75% of time. Clears up when engine warms. Sometimes after a run I'd go to start after 5 Mins off and lumpy but on a hot engine. Here's the rub: It seemed to correspond with using redex diesel. I bought this on a whim. Is it possible this is the cause or is this coincidence? I'm going to run it near empty and fill up, and monitor next week. Sounds like an injector is on the way out. There's a lot of oil around injector 3... Kindly Mike

May 6th, 2014, 12:43	#2
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	Injectors carry diesel, so if you have oil, maybe your rocker cover gasket is on its way out. You need to clean the area and monitor it regularly to find the source. There's a chance that Redex has dislodged crud in your fuel tank and your fuel filter is now pretty blocked, restricting fuel flow for smooth starting and running. Fortunately, this is one of the cheaper and easier jobs to do and a good starting point. You may get lucky. __________________ 2002 S60 SE D5 Manual 209000 miles

May 6th, 2014, 13:11	#3
skyship007 Premier Member Last Online: May 2nd, 2018 08:14 Join Date: Sep 2011 Location: DownSouth	If you put a fuel additive in the tank it can free up so much crud that it blocks the fuel filter. So I would start by checking the fuel filter and seals first. If you have been using cheap diesel and the fuel filter is good, then try using Liqui Moly diesel purge. Just drain the fuel filter and top up. It's a very effective direct feed injection cleaner. If it's not the filter or a gummed up injector, then it's time to get the codes read. Top of the list would be MAF sensor, which can be checked by seeing if disconnecting it improves the performance. Some diesels don't start too well when cold if the glow plugs are kaput. It's easy to check them, as the resistance across one should only be a few ohms and a broken one will be near open circuit at several K. __________________ 2003 V40 1.9TD Mods: Scratches, bent bumpers, raised REAR mats & internal mud guards. SHELL ULTRA 5/40 & LIQUI MOLY CERATEC. Everyone should DYOR (Do Your Own Research) Last edited by skyship007; May 6th, 2014 at 13:22.

May 6th, 2014, 14:06	#4
JohnL Senior Member Last Online: Apr 2nd, 2024 15:50 Join Date: Dec 2003 Location: Oise	To be sure you need to do an injector leak off test to find which one is faulty. It need only be one. That will usually cause long cranking time, It could also be the pump in the tank that feeds the fuel thru to the front, but pehaps not if it runs ok after its started. The engine breather pipe is close to injector 2, worth a check its not that leaking. John

May 6th, 2014, 15:13	#5
JohnL Senior Member Last Online: Apr 2nd, 2024 15:50 Join Date: Dec 2003 Location: Oise	To be sure you need to do an injector leak off test to find which one is faulty. It need only be one. That will usually cause long cranking time, It could also be the pump in the tank that feeds the fuel thru to the front, but pehaps not if it runs ok after its started. The engine breather pipe is close to injector 2, worth a check its not that leaking. John

May 6th, 2014, 17:42	#6
barkl0r New Member Last Online: Nov 8th, 2014 10:19 Join Date: Mar 2013 Location: Carrickfergus	I'll clean the rocker cover etc... Monitor the oil/black mess and do a leak off test and replace filter. Car runs good when it's normal so I bet the tank pump is OK and the maf is OK but if the above doesn't help I'll be sure to investigate these. Currently got 10w40 oil. Normally 5w40 used. Changed every 6-8k. Thanks guys!

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