zigen9 Posted May 27, 2008 Share Posted May 27, 2008 Hey guys, anyone knows anybody that is reliable and knows a lot about RB motor in Toronto Area? After the swap to my 280....I don't really have a chance to drive it....when the time I drive it...the car back fires a lot...I really need someone that can help me out.... Quote Link to comment Share on other sites More sharing options...
fentin_fury Posted May 28, 2008 Share Posted May 28, 2008 i am not an expert - but i have some familiarity with these engines - where are you. PM me if you want some assistance. Q Quote Link to comment Share on other sites More sharing options...
Careless Posted May 28, 2008 Share Posted May 28, 2008 Hey! you still haven't posted details about your build at all. stock ecu? oxygen sensor pooched? fouling plugs? need data! Quote Link to comment Share on other sites More sharing options...
zigen9 Posted May 28, 2008 Author Share Posted May 28, 2008 Hey...my build is an R33 Rb25det, stock ecu (but the guy said it looks like there is a chip in there...i'm not too sure about that), intake manifold, FMIC, 3" piping for exhaust....basically most of the stuff in the motor is stock....any more details? Quote Link to comment Share on other sites More sharing options...
stony Posted May 29, 2008 Share Posted May 29, 2008 Well if It's a stock motor with all stock parts except a intercooler and the ecu is chipped it may have not been chipped for your engine setup. Backfires under acceleration or deceleration or both? Did the motor sit for a long time before getting it going? I i had a similar issue with mine ... i had let it sit over the winter with out starting and fuels system was open. The fuel that was sitting in the top of the injectors evaporated and gummed up the screens causing all kinds of issues. Quote Link to comment Share on other sites More sharing options...
zigen9 Posted May 29, 2008 Author Share Posted May 29, 2008 It backfires under both circumstances (accleration and deceleration). That's what i thought too Stoney, I believe the A/F ratio is really off right now...when I start the engine...sometimes I have to step on the gas in order to get it start...when the engine runs...I need to step on the gas peddle for a bit...until the car warms ...now i'm scare the backfire is goin to break my piston and block...because that seems like the symtom of my friend's STI before...it backfires a lot...and then the piston ruin...and the block broke... Quote Link to comment Share on other sites More sharing options...
stony Posted May 29, 2008 Share Posted May 29, 2008 Well you have a couple options.... sounds like the engine needs to be tuned. you can either find someone that can do a ROM tune or just go with a standalone... this way anyone can tune it. I highly recommend getting it tuned on a dyno unless you really know what your doing on the street. Consider it a investment in your motor. You wont regret it. but you will regret not doing it if you blow up the motor Quote Link to comment Share on other sites More sharing options...
zigen9 Posted May 29, 2008 Author Share Posted May 29, 2008 Thats very true Stoney. I want to get the AEM EMS...but is too expensive for now...my plan is to run my motor with the stock ecu tuned....that should work right? Quote Link to comment Share on other sites More sharing options...
Careless Posted May 30, 2008 Share Posted May 30, 2008 ok lets try some troubleshooting. 1) check your fuel pressure regulator to make sure it's working. 2) make sure all your spark plugs are actually firing (dumping fuel into the exhaust will backfire under any circumstance). 3) check to see that none of your injectors are stuck open. 4) purchase an independant A/F ratio meter, like a Techedge or a PLX. You're going to need one anyway, and you might as well spend the 3 or 400 bucks now and get those to see what your A/F ratio really is. it's rich. but how rich If you need an injector test light, you can come to my house and I'll help you test for injector pulse with the noid lights I have. Not sure when a good time is though, cause lately I've been busy spending my time making coin for my projects. Quote Link to comment Share on other sites More sharing options...
Careless Posted May 30, 2008 Share Posted May 30, 2008 and I'm willing to bet your ECU has been chipped for a car with larger injectors. Quote Link to comment Share on other sites More sharing options...
fentin_fury Posted May 30, 2008 Share Posted May 30, 2008 and I'm willing to bet your ECU has been chipped for a car with larger injectors. What injectors are in you car? At least a color and brand will help. Q Quote Link to comment Share on other sites More sharing options...
Careless Posted May 30, 2008 Share Posted May 30, 2008 RB25's are pink, i think. Quote Link to comment Share on other sites More sharing options...
zigen9 Posted May 31, 2008 Author Share Posted May 31, 2008 "Careless" thank you for your suggestion. I will have tat try out and see..cuz lately i'm just working on the body for my car...my vacuum hose at the top was wide open before...so i purchased a PCV hose and covered tat up...after that when i start the car...is much more easier... "Fentin Fury"..I will check my injectors tonite....thanks for your advise btw.. Quote Link to comment Share on other sites More sharing options...
Canadianz Posted May 31, 2008 Share Posted May 31, 2008 Rb25's arn't pink least the ones I have are purple on top. If you find out you have a bum injector you can always steal some of a sr20det they are the same I think. If you have a friend with a stock ECU around here it might be worth trying that too. As the other guys said depending on the tune of it that might be causing half the problem. Any how best of luck oh also have a look at the idle air valve on your intake manifold, the RB's run really screwy if there is a vacuum leak. good luck Chris Quote Link to comment Share on other sites More sharing options...
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