I have a just built ls/vtec with je pistons, eagle rods, ss valves, crower dual valve springs and retainers, i am using a jdm obd1 b16 ecu. When i pull spark plugs #3 and #4 they are black and #1 and #2 almost white. Motor is built for turbo but i want to get the turbo running right first.

 

are the injectors enw did you chnage injectors? make sure your fpr is hooked up to vacuum

 

i switched injectors 3 times and each time the same problem, my fpr is getting vaccum, could it be the fpr itself

 

yes it could i would check the pressure or try swapping fpr's pull the rail off and blow it out make sure there is no crap inside, does your resistor box xorrespond to your injectors

 

Could it be oil, not fuel?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by victoriasamantha &raquo;</TD></TR><TR><TD CLASS="quote">I have a just built ls/vtec with je pistons, eagle rods, ss valves, crower dual valve springs and retainers, i am using a jdm obd1 b16 ecu. When i pull spark plugs #3 and #4 they are black and #1 and #2 almost white. Motor is built for turbo but i want to get the turbo running right first.</TD></TR></TABLE>
Is it running on all four cylinders?

 

do a compression test, are you consuming oil? are all the spark plugs the same? are the cables new? measure the resistance on each one and tell me the readings... who instaled the head gasket? are you con consuming water/coolant?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by victoriasamantha &raquo;</TD></TR><TR><TD CLASS="quote">I have a just built ls/vtec with je pistons, eagle rods, ss valves, crower dual valve springs and retainers, i am using a jdm obd1 b16 ecu. When i pull spark plugs #3 and #4 they are black and #1 and #2 almost white. Motor is built for turbo but i want to get the turbo running right first.</TD></TR></TABLE>

do a compression test, first
if compression is fine, try changing your fpr, if its not getting pressure than most of the fuel will be going into cylinder 3 and 4, cause its closer to the fuel line.

hpoe this helps a little

 

i did a compresion test and all 4 were around 175/180 which should be right for 9:1 pistons, i changed fpr tonight, did not have chance to check, i installed head gaskett, could head gasket be messed up and still have good compresion

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by victoriasamantha &raquo;</TD></TR><TR><TD CLASS="quote">i installed head gaskett, could head gasket be messed up and still have good compresion</TD></TR></TABLE>

Not likely, but if i learned something working as a mechanic is that anything might happend.... maybe there is a small leak between one of the oil passages and the cilinders, and since the engine hasn't run that much it hasn't busted.

The thing that has me thinking is that it's hard for 2 spark plugs be different than the other 2......maybe you can get a pic of all of them, that way we can determine what exactly is what you're burning...
Anyway, does the car smokes?
tell us what happend after you instaled the FPR

 

how do u insert a pic on this site so i can show spark plugs[IMG][/IMG]

 

I've seen some JDM b16's come with separate O2 sensors for 1-2 and 3-4, which makes me think it can control the pairs spepartely. I have no idea which OBD version they were. If it was looking for a signal for two sensors and only had 1, could that cause problems?

 

everything electrical came off of my 92 civic except ecu and i tried 2 different p28 ecu's and it did the same thing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by victoriasamantha &raquo;</TD></TR><TR><TD CLASS="quote">how do u insert a pic on this site so i can show spark plugs[IMG][/IMG]</TD></TR></TABLE>

you host them on some other web page, like imagestation.com or wetoddidracing.com and then once they are uploaded you pick the link and put it between the "[IMG.]" and "[/IMG.]"

 

do u know where to get the tool to do a leak down test, any other suggestions, i tried fpr and still same problem

 

then i'm pretty sure you have a vacuum leak, look at your intake manifold for leaks, or is what the guy in your other post said about the two o2 sensors

 

the car is obd1, there is only one o2 sensor, the o2 sensor came off a 99 si, could this be the problem since they have two o2 sensors

 

i dunno anything about o2 sensors, but my guess would have been that the 99 o2 sensor would been a different connector, but i dunno...

i'm still a lil doubtfull that one O2 sensor would only mess with 2 cylinders.
Where is your O2 sensor located?

 

run the engine, and pull the plugs wires off on the #1 and #2 cylinders to see if it makes a difference.

Did you do any changes to the wiring harness?

you could put a timing light on the wires to 1 and 2 to see if it's sending spark. or pull the plugs, lay it on top of the engine, and fire the engine up.

also smell the plug hole for fuel if you pull the plug and fire the engine. just to check if the injector is working.

 

i did not change anything on harness, i pulled plugs 1 by 1 and same result for all 4

 

somebody said i should to leak down test but i read that this test is to find out where u r losing compression and my compression is good, any body know about this

 

you can determine many thigns with leakdown not just where your compression is going, blown head gasket, burning oil crack sleeved etc.

 

what i read is that if one of the things that u said are bad u will have bad compression, so what u r saying this is not true

 

make sure the wires running to the injectors #3 and #4 are not exposed anywhere. If they ground themselves out on the IM then fuel will dump into these injectors.

I had this problem on my b16. Just an idea.

 

how do u tell if it is oil or fuel on the spark plugs