Rate my spark plugs...

The place for all technical car discussions. If you haven't already, read our Disclaimer first!

Moderator: The Mod Squad

Post Reply
Technohedge
Toyspeed Member
Posts: 67
Joined: Wed Mar 30, 2016 6:59 am

Rate my spark plugs...

Post by Technohedge »

From Caldina GTT thats not been boosting like it should for a while now. Keep meaning to get to the bottom of it.

Pressure gauge reads normal boost pressure, but it smells a lot of unburnt fuel so im wondering if its rich?

seems a fair bit of carbon on the plugs?

Image[/url]

Left plug is from cylinder nearest river
User avatar
Dell'Orto
** Moderator **
Posts: 17494
Joined: Tue Jul 08, 2003 4:07 am
Location: Straight out the ghetto, Lower Hutt

Re: Rate my spark plugs...

Post by Dell'Orto »

If anything, the centre two are lean.
1988 KE70 Wagon - Slowly rusting
1990 NA6 MX-5 - because reasons
2018 Ranger - Because workcar
1997 FD3S RX-7 Type R - all brap, all the time
OMG so shiny!

Quint wrote:Not just cock, large cock.
User avatar
85AW20v
Toyspeed Member
Posts: 1059
Joined: Fri May 24, 2002 5:18 pm
Location: Taupo, NZ

Re: Rate my spark plugs...

Post by 85AW20v »

Or not firing properly hence the unburnt fuel smell.....
See ya

Simon
85 MR2 20v
User avatar
Mr Revhead
SECURITY!
Posts: 24635
Joined: Tue Jan 20, 2004 3:06 pm
Location: Nelson
Contact:

Re: Rate my spark plugs...

Post by Mr Revhead »

If not firing properly they will be wet and dirty.
Being the subject of E-whinges since 2004 8)

http://www.centralmotorsport.org.nz/home

Image
Technohedge
Toyspeed Member
Posts: 67
Joined: Wed Mar 30, 2016 6:59 am

Re: Rate my spark plugs...

Post by Technohedge »

Hmmm its been bugging me for ages now, I have checked the resistance on all the coil packs and they seem to be consistent. Seems to be getting manifold pressure from the boost gauge reading (although Im unsure if its getting up to pressure as quickly as before, hard to tell from looking at a gauge).

Plugs arent that old either
User avatar
Dell'Orto
** Moderator **
Posts: 17494
Joined: Tue Jul 08, 2003 4:07 am
Location: Straight out the ghetto, Lower Hutt

Re: Rate my spark plugs...

Post by Dell'Orto »

Have the injectors tested perhaps?
1988 KE70 Wagon - Slowly rusting
1990 NA6 MX-5 - because reasons
2018 Ranger - Because workcar
1997 FD3S RX-7 Type R - all brap, all the time
OMG so shiny!

Quint wrote:Not just cock, large cock.
Technohedge
Toyspeed Member
Posts: 67
Joined: Wed Mar 30, 2016 6:59 am

Re: Rate my spark plugs...

Post by Technohedge »

Yea I haven't tried the injectors. How does one test these?
User avatar
Bling
** Moderator **
Posts: 15990
Joined: Mon Dec 22, 2003 8:02 pm
Location: Quake City
Contact:

Re: Rate my spark plugs...

Post by Bling »

You take them to someone that can test them. Matt Dunn on here used to do it I think, likely still does.
Post Reply