fastass2000

iTrader: (22)

car runs horible when hot!! i have a msd 6010 box i have a 24x wheel running ngk br7es gapped at 35 plugs are white car misses and breaks up really doggy no power!! could it be crank sensor going bad? cam sensor? i have new msd wires plugged in to boxes brand new and switched carbed still doing the same thing???

ZONES89RS

iTrader: (25)

Well, white plugs means lean, that is a starter point, so from there, what does timing and jetting look like?

xpndbl3

iTrader: (23)

why are you running that cold of a plug n/a ? Secondly if the plugs are white keep adding jets, do you have access to a wideband to see what it's doing?

fastass2000

iTrader: (22)

Its a nos motor fuel pressure is at 5.5 I have 93 and 88 jets in it with a 6.5 power valve in front car idles great

xpndbl3

iTrader: (23)

huge jets in the carb, something else is up that it is running that lean. For instance I'm at 77/88 for jets with a bigger than normal PVCR in the primaries. So something is up with your combo, whether it's losing fuel pressure or something.

fastlsxS10

5.5 seams kinda low i run 8 with my setup and never have had a problem

fastass2000

iTrader: (22)

if i put it any higher it fouls the plugs

fastass2000

iTrader: (22)

would it still have a very bad miss if it was lean?

S10xGN

iTrader: (11)

Hell yeah, it'll miss when it's lean. Can't imagine how you could possibly be lean with those HOGGER jets unless you're running a 500 CFM carb on a 600" motor or you have a humongous vacuum leak somewhere. Try and get your basics taken care of first...

LS1MCSS

iTrader: (18)

Take the pressure up to 7.5, get rid of the cold plugs until you get the motor to run right, and go down on the jets until it won't foul the plugs with the higher fuel pressure. And also, as said above, look for a vacuum leak. After you get the motor to run right, then you'll be ready for the cold plugs.

xpndbl3

iTrader: (23)

don't need to run fuel pressure that high at all. 6 psi is perfectly fine

3pedals

iTrader: (3)

Are you sure it is lean? if it is crazy lean it will usually have a bog. unleaded fuel will not color the plugs even if it is stupid rich. I suspect it it s rich missfire you are seeing.
what is your engine combo, and what carb?/timing?

fastass2000

iTrader: (22)

well the car was on dyno and ended up being very lean i went 99 92 jets with a 6.5 powervalve car still need to get richer....and i do not have any vacuum leaks???

Z284thgen

iTrader: (46)

How about some motor info. Like CI carb size intake. Timing curve Compression etc

ZONES89RS

iTrader: (25)

What air bleeds are in the carb? I hear that the wrong air bleeds can require larger jets.

Pop N Wood

iTrader: (1)

You said it runs horrible when hot.

Could be fuel pump - regulator - filter. See if you can set up the fuel pressure gauge so you can read it when running.

I assume you set the floats right.

Darracq

iTrader: (1)

what size carb?

S10xGN

iTrader: (11)

This is gasoline? You really need to try a completely different carb, something is waaaayyy wrong...

vandal699

iTrader: (7)

You should answer the questions that keep getting asked about your set up and get that thing on a wideband. You can ask questions on here all day but without real info no one can give you real help.

b00sted

iTrader: (7)

He gave absolutely NO info on what the motor is, and you're giving him advice on which plugs to run?