Just installed a Tsudo Catless Downpipe
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Just installed a Tsudo Catless Downpipe
I don't know if this is good for the car or not, but the car shoots 3-ft. flames and it constantly backfires from 4k-6k rpm. What's wrong with my car?
#6
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OK, so a stock ECU, stock boost control, and you have an aftermarket downpipe and midpipe. That is a very bad idea if you're not certain your boost levels are still under control. Have you taken it out on the road yet, or is what you're reporting just the first start in the driveway?
I'm gonna hope you haven't already blown your engine. Does it idle ok? Do you have a boost gauge?
Dave
I'm gonna hope you haven't already blown your engine. Does it idle ok? Do you have a boost gauge?
Dave
Last edited by dgeesaman; 05-19-05 at 05:31 PM.
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Yes you are correct, everything is stock except for the downpipe and exhaust. The first drive was amazing; pulled really hard, but after that everything became crappy. The car idles fine, but will stall at times if I rev the engine. If I go WOT, the whole car sputters; kinda like its hitting a rev limiter. The turbo doesn't even spool. Or if it tries to, its like the ECU is cutting the fuel or something. Man I hope its not blown! No boost guage btw.
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#8
Rotary Freak
Uh, ohhh... that doesn't sound good.
Originally Posted by importuner
Yes you are correct, everything is stock except for the downpipe and exhaust. The first drive was amazing; pulled really hard, but after that everything became crappy. The car idles fine, but will stall at times if I rev the engine. If I go WOT, the whole car sputters; kinda like its hitting a rev limiter. The turbo doesn't even spool. Or if it tries to, its like the ECU is cutting the fuel or something. Man I hope its not blown! No boost guage btw.
#9
Rx7 Wagon
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Originally Posted by importuner
Yes you are correct, everything is stock except for the downpipe and exhaust. The first drive was amazing; pulled really hard, but after that everything became crappy. The car idles fine, but will stall at times if I rev the engine. If I go WOT, the whole car sputters; kinda like its hitting a rev limiter. The turbo doesn't even spool. Or if it tries to, its like the ECU is cutting the fuel or something. Man I hope its not blown! No boost guage btw.
#11
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Originally Posted by importuner
Yes you are correct, everything is stock except for the downpipe and exhaust. The first drive was amazing; pulled really hard, but after that everything became crappy. The car idles fine, but will stall at times if I rev the engine. If I go WOT, the whole car sputters; kinda like its hitting a rev limiter. The turbo doesn't even spool. Or if it tries to, its like the ECU is cutting the fuel or something. Man I hope its not blown! No boost guage btw.
Dave
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get a boost guage.. well, vacuume really... check howmuch vac you are getting at idle... if its anywhere above 10 and stable, its ok... it should really be at around 15 inHG.. if its stock.. but if your getting vacuume thats not holding well or jumping all over the place, its blown.. also, by the way that you described it, i think your motor is blown.... you probibly detonated on the first run.. and blew or chipped an apex or side seal... an easy way to tell is take out one of the spark plugs and crank the engine... the noise should be equal... it should pump out air in equal sounding patterns.. if you get a high, low low on either the front or the rear rotor, the motor is blown... thats the faster way of knowing it until you get a real compression check
#14
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Originally Posted by dgeesaman
Yep, I bet its blown. Read the FAQ and then take it for a compression check. At least be smart enough this time to take it to a rotary shop for the rebuild and new turbos, because dealers are stupidly expensive and not good.
Dave
Dave
1) The bolt-on mods that you can buy cheaply, are not as simple as bolting them on. The midpipe is extremely dangerous without proper boost management
2) The Mazda dealer would seem to be a safe place to take your car - it's not.
The bottom line is you must research every thing you do on this car before doing it - the simple answer is sometimes very wrong. Some people come in here, ignore the warnings, and blow and engine or wreck the car doing something stupid. If this is your first time dealing with the special character of the FD, you can't be blamed. But from this point on it's vital to follow the collective knowledge and do extra homework.
Dave
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Oh man I was hoping the replies wouldn't lead to this!! The idle is fine; it sounds normal, just a bit louder due to the addition of the downpipe. The only time it stalls is when I rev standing still; just to little over 1k rpm, on its way down. I mean the temperature level is fine and the car drives. It's just that I can't build anyboost because it "knocks" I'm gonna get this checked out. Damn man, I never knew something like this can happen with a simple mod! Thanks for your help guys!
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Don't assume your engine blown! I know everyone on here is saying that it might be. But I had all the signs of a blown motor and it turned out to be a stuck side seal, which most of times you can rev them back out.
#19
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Originally Posted by purerx7
I thought their were no worries if you just add a downpipe plus catback, with the stock ecu. My only performance mod is downpipe and catback, I should be fine with everything else stock right, accoring to the 3 mod rule?
Adding a downpipe and midpipe together are a much bigger step - the elimination of both catalytic elements can lead to much higher boost that the stock ECU isn't programmed to handle. If I understood Importuner correctly, he has a downpipe, midpipe, and cat-back - which can often be trouble - and is an unknown danger without at least a boost gauge to monitor the boost level.
Dave
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