No fast idle on cold start (91 1.6)

BX Tech talk
Pcheaven
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BXpert
Posts: 112
Joined: Tue Mar 09, 2021 12:34 am
Location: Kent
My Cars: Landrover discovery sport 2020
Previously ipace/discovery 5/velar and many others including 2 bx gti back in early 1990
x 5

No fast idle on cold start (91 1.6)

Post by Pcheaven »

Seems Like a simple issue. I hope

From cold start the engine does not fast idle and requires me to hold accelerator depressed a little for a while.


Are there any know issues/ fixes before I consider a carb refurb. After all it’s 30 years old.
BX Meteor. Sub 20000 miles. Very Original.

ToDo list.

1. Get cam bet etc replaced etc
Have a GnT
2. G̶e̶t̶ ̶t̶h̶e̶ ̶r̶a̶d̶i̶o̶ ̶t̶o̶ ̶w̶o̶r̶k̶.̶ ̶
Have a GnT
3. Adjust the clutch
Have a GnT
4. Clean LHM tank then a complete flush
Have a GnT
5. Wash, clay bar then ceramic coat paintwork.
Have a GnT

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jamescarruthers
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Posts: 518
Joined: Wed Nov 07, 2012 2:11 pm
Location: Cambridge
x 17

Re: No fast idle on cold start (91 1.6)

Post by jamescarruthers »

I presume you have the autochoke rather than having forgotten to pull the manual choke handle out? :D

I never suffered it myself but heard it discussed a lot. I did a little search on here for “autochoke” and these two seem pretty relevant:
https://bxclub.co.uk/forum/viewtopic.php?t=9467
(For the 19 so not sure if applicable) viewtopic.php?t=1478
1987 Volvo 480 ES
2002 Renault Avantime Privilege 3.0 V6

Previous BX's:
A966 XRL -- BX 16 TRS
H767 BEG -- BX 14 TGE
B316 AMP -- BX 14 E

Pcheaven
BXpert
BXpert
Posts: 112
Joined: Tue Mar 09, 2021 12:34 am
Location: Kent
My Cars: Landrover discovery sport 2020
Previously ipace/discovery 5/velar and many others including 2 bx gti back in early 1990
x 5

Re: No fast idle on cold start (91 1.6)

Post by Pcheaven »

jamescarruthers wrote:
Sat Apr 03, 2021 4:58 pm
I presume you have the autochoke rather than having forgotten to pull the manual choke handle out? :D

I never suffered it myself but heard it discussed a lot. I did a little search on here for “autochoke” and these two seem pretty relevant:
https://bxclub.co.uk/forum/viewtopic.php?t=9467
(For the 19 so not sure if applicable) viewtopic.php?t=1478
Defiantly an auto choke. :)

I have read loads on here. Quite interesting.
Could be a pain to resolve.
I will start with the vacuum pipes and see if it’s possible to manually throw the choke just to check the carb and eliminate the auto choke mechanism.
BX Meteor. Sub 20000 miles. Very Original.

ToDo list.

1. Get cam bet etc replaced etc
Have a GnT
2. G̶e̶t̶ ̶t̶h̶e̶ ̶r̶a̶d̶i̶o̶ ̶t̶o̶ ̶w̶o̶r̶k̶.̶ ̶
Have a GnT
3. Adjust the clutch
Have a GnT
4. Clean LHM tank then a complete flush
Have a GnT
5. Wash, clay bar then ceramic coat paintwork.
Have a GnT

User avatar
jamescarruthers
BXpert
BXpert
Posts: 518
Joined: Wed Nov 07, 2012 2:11 pm
Location: Cambridge
x 17

Re: No fast idle on cold start (91 1.6)

Post by jamescarruthers »

I can’t help much further as the autochoke was replaced with manual on my 16 and the two 14s were built manual.

Hopefully you get a quick result.
1987 Volvo 480 ES
2002 Renault Avantime Privilege 3.0 V6

Previous BX's:
A966 XRL -- BX 16 TRS
H767 BEG -- BX 14 TGE
B316 AMP -- BX 14 E

Pcheaven
BXpert
BXpert
Posts: 112
Joined: Tue Mar 09, 2021 12:34 am
Location: Kent
My Cars: Landrover discovery sport 2020
Previously ipace/discovery 5/velar and many others including 2 bx gti back in early 1990
x 5

Re: No fast idle on cold start (91 1.6)

Post by Pcheaven »

I located the fast idle screw, and gave it an 1/8th of a turn. that appears to have sorted the problem. cold idle is now just over 1100.

Have no idea what the black cover on the auto choke does though. can't find it mentioned in the Haynes that just arrived. It appears to have a small loop vacuum pipe connected to black housing.
BX Meteor. Sub 20000 miles. Very Original.

ToDo list.

1. Get cam bet etc replaced etc
Have a GnT
2. G̶e̶t̶ ̶t̶h̶e̶ ̶r̶a̶d̶i̶o̶ ̶t̶o̶ ̶w̶o̶r̶k̶.̶ ̶
Have a GnT
3. Adjust the clutch
Have a GnT
4. Clean LHM tank then a complete flush
Have a GnT
5. Wash, clay bar then ceramic coat paintwork.
Have a GnT