Need some help reading my plugs

[JET]

Nevermind, this looks like a 2.0, then you are fine.

[4*G*6*3]

No, reading the plugs is not accurate. just a general guideline for a rough estimate.

i usually look at the ground electrode.

these cars do not fuel cut if you are over-running the injectors. they stock fuel system hits it limits around 15 psi.



Right on, makes sense now.

as far as maxing out the fuel system i should be in the clear, I'm onlly running 10-12 psi.


I'm going to pick up a old school data logger & WB for now so i can see whats going on.

[4*G*6*3]

Nevermind, this looks like a 2.0, then you are fine.


yeah its still a 2.0. just out of curiosity were you just thinking about the clearence in-between the pistons? Im sure that could be a problem

[Shane@DBPerformance]

Just get a wideband to know the a/fs and datalogger to see if it's knocking. You could be very rich at part throttle and lean during boost and never know by looking at old plugs.

To truly read plugs, you need to put in a brand new set, do a full throttle run and then shut the car off as soon as possible before letting the rpms come back down and then look at the plugs with a light and possibly a magnifier.

[4*G*6*3]

Just get a wideband to know the a/fs and datalogger to see if it's knocking. You could be very rich at part throttle and lean during boost and never know by looking at old plugs.

To truly read plugs, you need to put in a brand new set, do a full throttle run and then shut the car off as soon as possible before letting the rpms come back down and then look at the plugs with a light and possibly a magnifier.


Indeed im getting a WB and data logger. The plugs have maybe 30 miles on them, majority of the pulls were wot. they look okay, but im giving up on trying to read them.

I thought i would be able to get a decent reading to know whats going on with the engine, but from what everyone says including you it sounds like its not accurate at all for what i really want to know.

thanks for the help, I'll let you know what my logs and a/f look like once i get them.

[niterydr]

Proper heat range will show as a band about the 45 degree mark on the grounding strap, then the plugs are right heat range.

Typically a white insulator (ceramic) = leaner. Black specs on insulator=detonation, again it is all relative to how/when you are sampling.

1 heat range colder at 12psi is probably a bit towards the cold side on pump gas, but you are probably fine. You may run out of fuel pending how the system flows up top, and you'll know when you hit fuel cut with that MAF.

Get a WB in there and a logger, upgrade pump/injectors/maf and have fun!