Im getting a white powder on my spark plugs in my GSR swapped CRX. It got a lot better after hooking up the IAB's. I'm stalling out at idle sometimes when i hold the brakes in, which means either lean or rich. What would white deposits point to? The engine seems to be performing fine, and my fuel pressure looks to be to spec. Cyl 1 plug looks the most white, where cylinder 4 seems to have more of a tan/normal color according to NGK's sparkplug guide (http://www.ngksparkplugs.com/tech_su...2.asp?mode=nml) but the stalling at idle points to plugs. Brand new MSD wires, brand new dist and plugs. What would you guys recommend?

 

white is lean...

 

Your for sure running lean. what kind of piggy back or computer, if any, do you have. Do you have a bunch of mods. If so you should get a wideband O2. That should fix your problem. If you dont, someday you might have some bad detonation and game over.

 

none, im completely stock, just rebuilt. this makes me a bit puzzled. I put in a set of iridiums and where the electrode hits the contact on the grounding strap there looks to be a white dot of some white built up. I'm not sure why id be running lean, if anything i should be rich. The motor is stock, just rebuilt with 500mi on it (from testing), 2" exhaust straight back, intake, aftermarkit harmonic balancer, walboro 255 fuel pump for when it was lsv-supercharged. Also, brand new 02 sensor; my a/f gauge is saying rich at normal driving when im sitting at a cruising RPM (2-3K) otherwise its hard to read.

Why would i run lean/how would i fix it? btw i pulled the plugs after idle; im going to try taking a small pull tomorrow and turn it off right away to see what i get


Modified by rtnlsltn at 1:09 AM 7/1/2007

 

i put on my fuel pressure regulator and dropped the pressure to 41 and i still get bogging; i'm going to try cleaning the plugs and see how it goes again, but i was bogging pretty bad on accel at times. I pulled the plugs after a few pulls, and im getting more of a tan color, however it still seems a bit chunked (in some spots but not in others), and not smooth around the grounding point curve....im going to pull the 02 sensor and see if it might be gunked up or bad.

 

ive got the same problem, check for an exhaust leak before the o2 sensor. This would cause this problem.

I know thats probably my issue, but ive swapped out everything except internals. Bent valve? timing, valve adjustment.

 

checked the 02 sensor and i got around .60 reading, then i checked it again about 30 minutes later after letting the car sit off adn i got a reading of .35, yet my a/f gauge still read rich both times.... i think this 02 sensor is messed, but either way i dont understand why the a/f would read the same with totally different sensor voltages

 

remove the walbro 255, check for vacuume leaks. possible intake or throttle body gasket

post a pic of the plug.

 

yea but an intake leak would mess up the idle, am I right? so wouldnt he know if he had a vac leak?

 

an intake leak sometimes cant be heard or picked up by a high or fluctuating idle. best way to check is use a wideband or scan tool to watch your o2 sensor best if you can watch b1s2 and spray brake clean or some carb clean around suspect areas. the o2 will richen up under these conditions.

 

i just cahnged out the 02 sensor and appear to be getting more-realistic readings. I'm going from .60-.85. I installed my fuel pressure reg. and lowered my pressure to 41. I got the car started and let it idle for a while, then i tried starting it again and i couldnt get it to run; changed the plugs with another set i had sitting around that looked OK and still couldnt get anything. Going to try a new set and see what happens... Ill take pics of the plugs after a few pulls with them. My A/F gauge is still reading rich, closest to stoich at idle. When its warming up i can see the engine surge sometimes and itll go further to stoich.... Air filter seems to be OK, not sure what else to check. Could PCV's be the issue? i just replaced the valve with a new OEM one, maybe the 2 spots are mixed on the holes the tubes go into?

 

Rip that A/F guage out of there, it does you nothing, unless its like a ugoWBO2. Yank the PCV system out of there too if you want, cap off the IM port, Hollow out the PCV valve or just get a 1/2 NPT nipple to insert into the grommet. Have the hose routed into a bottle or something.

Theres got to be a leak somewhere, check for exhaust leaks, spray deep creep into the TB, run car, see where the white smoke comes from, repair. Otherwise you have a dying fuel pump.

 

ill pick up some deepcreep and give that a shot. Is there any way to tell which fuel pump i have without dropping the fuel tank?

 

well, there you go, your runnign hella lean. You have a crx fuel pump running like 78lph, the gsr needs a 100+ i believe.

 

i was told there is a walboro 255 in the car; however my fuel gauge has been stuck since the car has been sitting for 6 months or so. Which fuel pump should i get for a GSR ill pick up a new one adn see if it solves anything.

 

you need to find out, seriously if there is a stock CRX pump, your not supplying enough fuel. Dont buy another one untill you take out the fuel pump, search on how to crx fuel pump, learn how to take it out, then post pics if you can.

 

i've done a fuel pressure test though, and my pressure seems fine through RPM ranges...

 

Let's back up, What is the condition of the gas? You mentioned the car has been sitting right. Did you put any cleaners in the tank?

Also let's check out more on the #1 cyl. Could be a fuel injector, could be a fuel filter too. Watch your fuel pressure when driving too.

At idle the vacuum going to the FPR is important. At idle the vacuum in the IM is higher than open throttle. Thus less fuel pressure is needed at idle because the vacuum is pulling the gas out of the injector more.

A couple to think about!

 

your fuel pressure could be good, so is mine, mines at like 47psi, but im still running hella lean.


Its funny to think a 89lph fuel pump, and I have 47psi, then put in a 255lph fuel pump, and I have 47psi. Pressure and quanity are 2 seperate things here.

 

i have driven it a bit, brand new premium gas, it is low right now though. I did put half can of seafoam in it, but i have since added a half tank or so. I'm going to drop the tank tonight and just pickup a new fuel pump, recommendations on that as far as size? fuel filter is new

 

hold on homes, if you have a 255lph fuel pump, thats the best you can get. you dont need to drop the tank to get the fuel pump out. Just take pictures of the serial numbers on the fuel pump.

If its not a 255lph pump adn the kid lied to you, go out and get a 255lph and drop that one in there.

and seafoam is going to F up alot of stuff, so you will need new plugs, and probably need to clean the primary o2 sensor, how? dip it in seafoam haha.

I think 1/2 can is too concentrated, thats probably why im having so many problems right now, i used to seafoam my car like a bitch, and now its running hella worse than it used to.. For some reason it only runs right with seafoam in the gas tank, so I dunno

 

ok ill jack it up and see if i can get some pictures; i don't know what im looking for other than what they look like new, but i think i'll faire. The pump may be bad is what i'm saying. The car had been sitting for a half year+ with a half tank of gas. I may just pull it to check and see how it looks. Also, my injectors were sent out, cleaned, checked to 9800RPM and tested fine

Just got a new 02 sensor; defected out my old one.

 

I just put new plugs in it and thought id see what i got after the new 02 sensor. I barely got out of my drive way and had to really apply gas to get it going, then whenever i applied gas it would almost stall, and it cut out on me twice. Was able to start it, but it seemed i would give it gas, then a second later the RPMs would move up a little. It took about a minute of revving to get it to finally move before it wouldnt cut out.....plugs had white on the grounding strap, and clear dark brown beginning to form around the rest of the ground area (looks to be what causes all my blacking plugs).

I've never had it this bad... so something must be slowly going, whatever it is. Unfortunately im not sure if my tank is empty or low, since my fuel gauge doesnt work, but the light should still come on.