oh no! not another sr problem thread

[santacruisin]

have you taken off the valve cover and had a look at what is going on? Maybe bent valve, cracked rocker arm or some other nonsense is messing up your higher revs. Just a suggestion. Couldn't hurt to look.

[240mike]

if you do not have an o2 sensor in the ecu runs @ .450 mv..
it is a fail safe.. like a limp home mode..
the o2 reads from .100 to .900
low is rich,, high is lean..
it tells the ecu if the motor is running rich or lean..
and that is how it your ecu knows how much fuel to dump in..
with-out an o2 your motor will run rich at idle and lean at high revs..

the white means to lean.. very bad..
lowering the spark plug gap will advance the timing a little bit..(wont show up on a gun)

raising the gap to much and the boost will blow out the spark and make it pop a little..

i think .28 is fine for a stock car..

i still think that your injectors are leaking..
just because you take them out doesnt mean you have to replace tho o-rings,, but i would.. they are like 5.00 each set from napa..

could be a boost leak too.. but thats easy to find..
i would start with a can of brake cleaner an spray around the intake plentum to see if any gaskets are leaking.. then check the boost piping and bov..

if nothing works ill buy your car..

[240mike]

oh and check the tps with a volt meter
put it on volts hit the gas slowly
i think an sr will start at .75 an max at 4.00
just probe the signal wire with the red one and ground the black one any where (of the volt meter)
make sure the car is on but not running

[bongnak]

you check the bov it sounds like a leaky blow off valve. yeah its easy to check for boost leaks on the charge pipes but a little tricky when its the bov that is causing the leak... thats prob why you hear the turbo more at 1 pound of boost

[rps13drfter]

i have not taken the valve cover off yet. i will be doing that soon if the timing isnt messed up. with the brake cleaner i just clean around gaskets with that, then use the soapy water or how? and for the boost leaks the only ones i know i have are the bov from when i put soapy water around the flange which i am trying to fix right now, but is being a

[240mike]

start the car and spray brake or carb cleaner around the intake parts and listen for a raise in idle.. if it is a big leak it will drop then raise..

i bet that if you take off the v/c you wont find shit thats causing your problem..

i just changed my injector seals and it fixed mine..
i was just having the same problem..

[rps13drfter]

fixed boost leak around the bov that i saw, got a real nice pull out of 1st gear then as soon as i hit 2nd all symtoms started again. i pulled the harness off each injector while motor was running, everyone came out to be working (leaking....not sure, have been trying to get the right set but napa ordered a set that didn't come with the smaller o-ring? any other ideas? still no timing check

[statik]

Originally Posted by nrg

it's boost leak or your wire harness is grounding out somewhere.

I can attest to that, I've had a wire rub through on the intake manifold over time and grounded itself out. Car would start to run like shit when you gave it any gas. Just something else to add to the list to check =]

[rps13drfter]

Originally Posted by statik

I can attest to that, I've had a wire rub through on the intake manifold over time and grounded itself out. Car would start to run like shit when you gave it any gas. Just something else to add to the list to check =]

will be checking on that one tomorow

[Ameer]

little back fire is normal. If you feel that it is running like shit then you have a problem.

[rps13drfter]

Originally Posted by Ameer

little back fire is normal. If you feel that it is running like shit then you have a problem.

its obvious it is running like shit

[kuramaya]

Think plugs were white from prior lean running. You now are running rich I would guess. Check all Intercooler piping again. Sometimes just a crack will cause the problem. A crack you can not see until under boost and it gives way. Also could be your BOV. Not running recirculated could be an issue. Was the BOV on and fine before this started? Is your BOV too loose? Close it all the way off to trouble shoot. Did the CAS get banged one way or the other? Vacuum/Boost Leak is my guess, then you need to fix that lean problem. Stock pump needs to go, as well as all the fuel lines under the hood and throw an aftermarket FPG and FPR on there and see what your fuel is. Have someone throw a wideband on it and double check you AFR's under boost once you get this problem fixed

[rps13drfter]

Originally Posted by bjorkluv

Think plugs were white from prior lean running. You now are running rich I would guess. Check all Intercooler piping again. Sometimes just a crack will cause the problem. A crack you can not see until under boost and it gives way. Also could be your BOV. Not running recirculated could be an issue. Was the BOV on and fine before this started? Is your BOV too loose? Close it all the way off to trouble shoot. Did the CAS get banged one way or the other? Vacuum/Boost Leak is my guess, then you need to fix that lean problem. Stock pump needs to go, as well as all the fuel lines under the hood and throw an aftermarket FPG and FPR on there and see what your fuel is. Have someone throw a wideband on it and double check you AFR's under boost once you get this problem fixed

i will dbl check all piping again once the motor cools off. the bov seemed to work fine before the problem (i will try putting the screw all the way in, its a greddy type-rs) i never touched or put anything around the CAS before all this. i already have a walbro pump, will look into getting all parts you listed.

also my idle is starting to be real shit, small pops but not much of a idle change as in rpm range

[rps13drfter]

if i was running as rich as i thought...why do my plugs look like this? (means lean)

and some pics of the build-up in my tip after all these problems have started




and i just tried getting new gas, and screwing the adjustment screw in the bov all the way in and nothing changed but harder to blow off

also out of curiousity why do the symptoms happen after about 4 psi now on my gauge

[steve shadows]

This thread reminds me of this very short clip...

http://stevenmansour.com/files/koolaid_ohyeah_fg.mov

all these people having these types of issues...it always (almost always) goes back to shotty wiring job..

or shotty something in the wiring. A lot of people are just afraid to admit it.

ps. yeah if its not some stupid vaccum/boost issue

[nrg]

because you have a boost leak somewhere!
your plugs look fine, your so call buildup is fine.

[frumdig]

i still dont understand why you just dont replace the o2 sensor... all these things your checking are almost irrelevant without an o2 sensor... i mean come on, there is a reason its there.... it affects your AFR, esp under boost...

[rps13drfter]

Originally Posted by frumdig

i still dont understand why you just dont replace the o2 sensor... all these things your checking are almost irrelevant without an o2 sensor... i mean come on, there is a reason its there.... it affects your AFR, esp under boost...

i ran the car plenty of times with out it, thats why im not to worried about it.


im going to try and put a new bov set-up i have laying around

[Vatche]

how could you say those plugs are fine, they are really white.

mine arent that white and i run lean

[ranger240]

what about your injectors/gaskets orings whatever.. from threads it seems like youve gone though your ignition fairly well... but id sugest checking that out before you do some serious work like taking the head off.. couldnt hurt.

my garbage ka24e ran like hell.. hesistating like you describe.. after plugs cap wires rotor and cleaning the MAF.. replacing the injector seals finally solved the problem... pm me if that works cause itd intrest me to know

[nrg]

Originally Posted by sr20detman

how could you say those plugs are fine, they are really white.

mine arent that white and i run lean

from the looks of his plugs, it seems lean but i bet his car was idling right before he pulled the plug. to really check for the correct plug condition, you have to run the car hard and turn it off instantly! to check the plugs.

[rps13drfter]

Originally Posted by nrg

from the looks of his plugs, it seems lean but i bet his car was idling right before he pulled the plug. to really check for the correct plug condition, you have to run the car hard and turn it off instantly! to check the plugs.

i did a ten min drive home from school going about 55-60 then when i got home turned right off, let cool down for 10 min. then pulled

[rps13drfter]

put a new bov, i get a better pull untill about 5psi then the symtoms hit and really hit around 6-7psi. ran the car hard then checked the plugs.....still white..Could my fpr be bad? my idle is getting crappy