stuthegeordie

Member

• Apr 23, 2015

• #1

My old 1986 2.5 petrol 110 starts first turn when cold. She's been sitting for a week in 20 degree weather, went to start her and it just spun for 10-15 secs then finally fired. Drove it for 20 mins with no issues. Parked it up, came back 30 mins later and same thing.

Any ideas?

Cheers in advance

 

Brown

Well-Known Member

Full Member

• Apr 23, 2015

• #2

Hmm. It's usually the other way round with petrol engines. Could it be the fact that it has been standing for a while rather than the temperature? Has the fuel drained out of the pipe back into the tank while it's been sitting there?

 

bluedog333

Well-Known Member

• Apr 24, 2015

• #3

Not that this helps at all, but... my mates petrol Polo does exactly the same when the weather warms up! He's going to have a look at it at the weekend, I'll update what he found!

 

zeaphod

Well-Known Member

• Apr 24, 2015

• #4

Used to be a fairly common problem with the petrol series - evaporation at the carb. Worth a search or a question on the series forum here.
I had the same on my old polo - they used to have a woeful auto choke.

 

bluedog333

Well-Known Member

• Apr 24, 2015

• #5

zeaphod said:

Used to be a fairly common problem with the petrol series - evaporation at the carb. Worth a search or a question on the series forum here.
I had the same on my old polo - they used to have a woeful auto choke.

Click to expand...

Did you ever get the Polo sorted? Or is a case of a bit of foot on the pedal when starting? Cheers

 

H

harry2012

Active Member

• Apr 24, 2015

• #6

My classic bug used to do the same. Was down to poor ignition timing and a dodgy poorly set up carb.

 

muckmuck

Active Member

• Apr 24, 2015

• #7

Have you removed the petrol cap? Sometimes get a build up of pressure in the tank if the breather on cap is blocked especially in the warmer weather.

 

cowasaki

Well-Known Member

• Apr 26, 2015

• #8

muckmuck said:

Have you removed the petrol cap? Sometimes get a build up of pressure in the tank if the breather on cap is blocked especially in the warmer weather.

Click to expand...

My Bandit motorcycle did this too until I stripped the filler cap and rebuilt it.

 

stuthegeordie

Member

• Jun 2, 2015

• #9

Yes removed the petrol cap........ no difference. Just to add more info. It does it on cold days too. Just drove it 5 miles stopped it for 10 mins and she had no intention of starting. Finally did with foot flat to the floor, put on seat belt and she stalled.

 

stuthegeordie

Member

• Jun 2, 2015

• #10

Does the 86/87 100 defender have an engine coolant temp sensor?

 

mrchurchill109

Active Member

• Jun 3, 2015

• #11

No on the coolant temp sensor - but a nice thought. The RV8 does that when it fails out the sensor - gets to be a right bastard to start.
My thought here would be to make sure what system is buggering up - could be fuel, but could be ignition as well. With it in failed condition crank it and see what the plugs look like, or crank it with the air cleaner off and dribble in a bit of gas. If it lights right up then it's fuel. if the plugs are wet and it's not lit off then look to ignition.
Also, check the routing of the fuel lines - vapor lock is not your friend.

Alan