plugs indicate lean???

Coupe50h · 10-08-2003, 06:37 PM

Yea, another one of these post, what could it be? stock injectors?

fuel psi is set at 40 vac off, 190 pump in the tank.
I do have a vacuum leak in my explorer intake, but it's the only way my car will idle right, i dont believe that one vacuum leak alone could whiten my plugs?
What else?
thanx for any help or suggestions.

88workcar · 10-09-2003, 05:25 AM

Does it pop, run out of power, ect... or give you lean symptoms? A plug can/will fool you from time to time.

Coupe50h · 10-09-2003, 08:08 AM

No, it will only pop thru the intake when it's cold, and i try to give it gas, once it warms up it has lots of power, and doesnt miss a beat.
i think your right, the plugs just look really clean, almost too clean,
i was reading an old post where it says we have cleaner fuel additives at the pump that can cause that?
I'll try some vp race fuel or something, and maybe give it about 43 psi of fuel, but then it will be rich at idle.

oh well.
thanx

10-08-2003, 06:37 PM	#1
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	plugs indicate lean??? Yea, another one of these post, what could it be? stock injectors? fuel psi is set at 40 vac off, 190 pump in the tank. I do have a vacuum leak in my explorer intake, but it's the only way my car will idle right, i dont believe that one vacuum leak alone could whiten my plugs? What else? thanx for any help or suggestions. __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

10-09-2003, 05:25 AM	#2
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	Does it pop, run out of power, ect... or give you lean symptoms? A plug can/will fool you from time to time. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

10-09-2003, 08:08 AM	#3
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	No, it will only pop thru the intake when it's cold, and i try to give it gas, once it warms up it has lots of power, and doesnt miss a beat. i think your right, the plugs just look really clean, almost too clean, i was reading an old post where it says we have cleaner fuel additives at the pump that can cause that? I'll try some vp race fuel or something, and maybe give it about 43 psi of fuel, but then it will be rich at idle. oh well. thanx __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Rich or Lean? or in between?	66StangGuy	Classic Mustangs	2	10-04-2003 07:26 PM
Spark plugs are white! Running lean? how to adjust timing?	1jimmy__d	Windsor Power	7	08-01-2002 05:29 PM
Car is Lean (white plugs)	SmokeyDP	Windsor Power	4	05-30-2001 08:00 PM
Wrong spark plugs helping performance?	QuantumMotorsports	Windsor Power	4	01-18-2001 12:20 PM
Will cooler plugs cure lean running 98GT?	MOD281	Modular Madness	6	11-30-1999 01:48 AM