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Cold Starting Fault

 
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Romadog2004



Joined: 06 Aug 2008
Posts: 554
Location: Warwickshire

PostPosted: Sat Feb 07, 2015 5:45 pm    Post subject: Cold Starting Fault Reply with quote

When starting my truck from cold, the fuel pump comes in runs then stops as expected, Ithen crank the engine and it doesnt fire.
I then repeat for 4-6 times and it then fires into life.
Is it low battery ?
Temp sensor ?
Idle valve?
Air intake sensor ?
Or anything else??

Its fine once started if I switch off and try again, and also fine when warm
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Culminator



Joined: 21 Dec 2014
Posts: 67

PostPosted: Sat Feb 07, 2015 6:18 pm    Post subject: Reply with quote

It's not battery, that seems fine as its cranking the engine. It might be old or fouled plugs perhaps or a fuelling issue.
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Buccaneer



Joined: 09 Mar 2014
Posts: 99
Location: That London/The Kabubble

PostPosted: Sun Feb 08, 2015 8:13 am    Post subject: Reply with quote

it could be the fuel pump. Mine always started well from cold but would require several cranks when warm. I could hear the fuel pump priming - but as it turns out it wasn't getting the required pressure. New fuel pump after it finally failed, and no starting problems.
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Romadog2004



Joined: 06 Aug 2008
Posts: 554
Location: Warwickshire

PostPosted: Sun Feb 08, 2015 1:12 pm    Post subject: Reply with quote

Buccaneer - Mine is the opposite as its fires perfect when warm. Question Question
I am croosing fingers that its nothing to do with the pump. On my truck I had to use a steel fuel tank and have used a new R/R 3.9 pump when I built it. Thats why I dont want to keep putting unnecessary pressure on the pump.

Culminator - I have had an issue on an old CSK where the battery was weak, but turned the engine over, but other electrics didnt get the amps and that made starting difficult. My BBUS bleeps twice whilst cranking sometimes, which I think is to tell you it has low power ???
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Culminator



Joined: 21 Dec 2014
Posts: 67

PostPosted: Sun Feb 08, 2015 5:47 pm    Post subject: Reply with quote

Well that's true, you do need enough juice in the battery to fire the ecu but I'd be surprised if it's the battery.
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Romadog2004



Joined: 06 Aug 2008
Posts: 554
Location: Warwickshire

PostPosted: Sat Mar 28, 2015 2:37 pm    Post subject: Reply with quote

Well i finally got my act together and plugged Autologic in and found that there were no readings from the airflow meter. So assume this will be causing my cold starting issue. Anyone disagree?

Where is the best place to get a good one from??
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Buccaneer



Joined: 09 Mar 2014
Posts: 99
Location: That London/The Kabubble

PostPosted: Sat Mar 28, 2015 2:47 pm    Post subject: Reply with quote

Don't even consider getting a MAF from Land Rover - the price will make your eyes water.

http://www.lrdirect.com/ERR5595-Air-Flow-Meter/

The LR Part is around 1,000 or the Allmakes part 82.16

Assume you have checked all the connectors first and given them a good clean?
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cooltide



Joined: 06 Dec 2014
Posts: 19
Location: United Kingdom

PostPosted: Wed Apr 01, 2015 9:27 pm    Post subject: Reply with quote

I have one I got off flea bay. I'll post it down if you like. If it works you can pay me Wink
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Romadog2004



Joined: 06 Aug 2008
Posts: 554
Location: Warwickshire

PostPosted: Sat Dec 03, 2016 6:16 pm    Post subject: Reply with quote

Update

Was taking up to 20-30 cranks to start!!
Last week couldn't get it to go, so had a friend put his diagnostics on it and the coolant temp read 76 degrees............when engine cold !!!
No wonder it wouldn't start - ECU thinks engine is warm and therefore doesnt trigger choke. So immediately thought the new temp sensor was duff. SO got a genuine one in the week and checked it today.

Fitted it and no real difference - so is it in ECU ?( I have Tornado chip etc)

Fitted spare gems ecu and that immediately read correct temperature and the engine fired straight away, choke mode was in operation too !!
One thing noted was fuel pump to longer to prime than before with original ECU.
Only issue is throttle position is at 12.9 degrees and engine is revving at approx 1700 rpm !! Is this amended on Autologic??
Will the Tornado chip be the issue or other part of ECU.
Getting peed off as want to drive it........... Sad
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Romadog2004



Joined: 06 Aug 2008
Posts: 554
Location: Warwickshire

PostPosted: Mon Dec 05, 2016 5:58 pm    Post subject: Reply with quote

Ecu and a spare on its way to Mark Adams for him to wave his magic wand over. Hopefully back for fitting at weekend, then MOT and some more cruising !! Wink Very Happy
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Romadog2004



Joined: 06 Aug 2008
Posts: 554
Location: Warwickshire

PostPosted: Sun Jan 29, 2017 5:50 pm    Post subject: Reply with quote

Well received ECUs back from Tornado Systems.
Had a spare Gems ECU unlocked for 4.0L so I can keep as a spare.
Another Gems ECU with my Chips transferred onto it and ready to rock - just had to swap the backplate casing over from the dud ECU so that the replacement fitted into the bracket in the engine bay.
5x T20 screws to remove backing on each, so a quick swap then fitted, plugged in then re-connect wiring plugs to airflow meter and Air temp sensor on air box and then ignition on .......
Fuel pump primes......
and Vroooooom she wakes up on first try for the first time in .........I have lost count! Shocked

Very Happy Very Happy Very Happy
Now need my air filter bracket back from being copied by my neighbour for mass production........ Wink

Then MOT !!
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defender50th
Site Admin


Joined: 14 Nov 2004
Posts: 1450
Location: Hampshire

PostPosted: Sun Jan 29, 2017 8:27 pm    Post subject: Reply with quote

Isn't it satisfying when you put something on to fix a problem and it actually works :) :lol:
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Romadog2004



Joined: 06 Aug 2008
Posts: 554
Location: Warwickshire

PostPosted: Mon Jan 30, 2017 5:54 pm    Post subject: Reply with quote

Luckily no Emoticon to describe the satisfaction !! Wink
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V8GPC



Joined: 03 Apr 2016
Posts: 145
Location: Manchester

PostPosted: Tue Jan 31, 2017 7:34 am    Post subject: Reply with quote

bit of a hi-jack to the post; is your neighbour copying any other 50th specific brackets such as the ECU bracket; etc?

Mine is a bit rusty and could do with a refresh... a nice shinny new one might be nicer.

Will you be posting list and prices on here soon?
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Romadog2004



Joined: 06 Aug 2008
Posts: 554
Location: Warwickshire

PostPosted: Tue Jan 31, 2017 5:29 pm    Post subject: Reply with quote

ECU bracket replacement done already - have one in my 110.
I will be getting pics up as soon as .
Prices to be confirmed too
Watch this space Very Happy
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