Unable to set up MK2 GTI 8v

Is your car playing up? Section includes conversion advice, temperature control, ECU and ignition problems.
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Dublife
OEM
Posts: 147
Joined: Sun Jul 14, 2013 1:37 am
Drives: 1991 mk2 Golf GTi 8v
Location: Scotland

Unable to set up MK2 GTI 8v

Postby Dublife » Mon May 13, 2019 12:44 am

Hi all,

My 91 gti 8v is having running issues, when cold its rough and wont rev clearly for a minute, then once warmed up, it feels like its misfiring under load. Unless i really floor it and it sometimes clears and goes (but still feels underpowered)

Replaced:
Lift pump as it was shot
Genuine blue temp sensor
Spark plugs
Plug leads
Dizzy cap
Rotor

I noticed the adjuster at MAF for the CO was fully screwed in so thought i'd try rubjonny's guide to setting up CO and idle, but when i get to the 'rev 3 times over 3k stage', it wont rev at all, itll either splutter its way up the revs or just cut out.
Any ideas?
Thanks for reading

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eddypeck
Supercharged
Posts: 9365
Joined: Thu May 23, 2013 1:29 pm
Drives: 1986 MK2 Golf GTI 8v
Location: Bristol, UK

Re: Unable to set up MK2 GTI 8v

Postby eddypeck » Mon May 13, 2019 7:31 am

I don’t have much experience with digi, but as you seem to have covered everything else could it be isv?
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DaveST
OEM
Posts: 23
Joined: Sun Aug 20, 2017 9:40 am
Drives: 1990 Golf GTI 8V 3dr
Location: Lincolnshire

Re: Unable to set up MK2 GTI 8v

Postby DaveST » Mon May 13, 2019 7:32 am

Have you checked the engine and ignition timing?

These really need to be spot on before adjusting the CO.
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User avatar
Dublife
OEM
Posts: 147
Joined: Sun Jul 14, 2013 1:37 am
Drives: 1991 mk2 Golf GTi 8v
Location: Scotland

Re: Unable to set up MK2 GTI 8v

Postby Dublife » Tue May 14, 2019 1:31 pm

Cheers for the replies,
Yeah the isv is all good but im gonna check the ignition timing too

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Rich
Dub Ninja
Posts: 1716
Joined: Wed Jun 13, 2012 11:03 pm
Drives: moped.

Re: Unable to set up MK2 GTI 8v

Postby Rich » Tue May 14, 2019 5:03 pm

Compression test.
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Avid follower of EddiePeck's lunchtime project.


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