HELP rocco wont start and need it ASAP

Carbs; K-jet; Tanks; Lines; Filler necks, Senders; aftermarket fuel systems; Exhausts and Manifolds;air filters - standard and aftermarket

Moderator: Scirocco Register

Forum rules
Hints, tips and guides for repair and modification - the FAQ section on the main website is worth checking first for information relating to common faults and technical help. Useful posts and guides will be added to the FAQ http://www.sciroccoregister.co.uk/scirocco-faq
scirocco_ne
Posts: 178
Joined: Wed Sep 19, 2018 11:00 pm
fill in the right answer: 15

Re: HELP rocco wont start and need it ASAP

Post by scirocco_ne » Sat Jun 22, 2019 9:55 am

mark1gls wrote:
Sat Jun 22, 2019 12:15 am
What did you use to get the CO reading, a Gunson home kit or a proper CO machine like they use for an MOT?
Our gunson bud. They wander readings wise but it does seem consistent once you learn how to use it.



mark1gls
Posts: 3301
Joined: Thu Apr 02, 2009 9:28 pm
fill in the right answer: 10
Location: Somerset

Re: HELP rocco wont start and need it ASAP

Post by mark1gls » Sat Jun 22, 2019 2:26 pm

Yes I use a Gunson and find they are out around 0.5% compared to the MOT test, maybe try it at 3% to see if it runs any better but mixture is the last thing to mess with so make sure the timing is spot on before adjusting the mixture.


Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
Mk1 88 Golf GTi cabriolet 1.8 DX. Daily drive.
Membership No. 323

scirocco_ne
Posts: 178
Joined: Wed Sep 19, 2018 11:00 pm
fill in the right answer: 15

Re: HELP rocco wont start and need it ASAP

Post by scirocco_ne » Sat Jun 22, 2019 10:07 pm

mark1gls wrote:
Sat Jun 22, 2019 2:26 pm
Yes I use a Gunson and find they are out around 0.5% compared to the MOT test, maybe try it at 3% to see if it runs any better but mixture is the last thing to mess with so make sure the timing is spot on before adjusting the mixture.
When i get a chance i am going to get ours cross referenced against a good mot test unit.

I want a mot tester unit myself one day as they can be unlocked from mot format so to speak and be turned into a analyser.

Apparently the manufacturers charge about £150 to do it so its about finding a old unit for the right money. A local classic specialist did it near me.


I find with this Gunson its best to use it after 10 minutes. If left on it seems to drift ever so slowly down. It always hits 2% on cal around a similar time and if left slowly reduces until you have to adjust.

There accurate within + or -. 25% apparently so id be keen to see how far off it is.

Mick



mark1gls
Posts: 3301
Joined: Thu Apr 02, 2009 9:28 pm
fill in the right answer: 10
Location: Somerset

Re: HELP rocco wont start and need it ASAP

Post by mark1gls » Sat Jun 22, 2019 10:19 pm

If you have a good local friendly garage they might stick your car on their machine for a bit of beer money if they aren’t busy, works for me sometimes or I wait till MOT time and get the bit of paper with the reading.


Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
Mk1 88 Golf GTi cabriolet 1.8 DX. Daily drive.
Membership No. 323