So,Anyway for reasons I can't say I had a 2.5" exhaust put on and I have no Cat no resonator.
I now have a straight through exhaust with no bends almost what so ever.. and a straight through muffler... Its all a long story...
anyway
Well since the install I have had back firing issues which I knew i would seeing as I have no back pressure.
The problem I am having though is when i'm around 4k and gun it WOT It will accelerate very fast then at random will cut out and some times backfire really loudly... You can feel the lose of power at these random cutting out and backfiring times. I am wondering if this is a timing issue a back pressure issue or fuel issue.. Seeing as it only does it above 4k at WOT.
It drives fine normally and haven't had problems with it cutting out if I keep the throttle around 3/4 the way when I gun it.
This kinda makes me think it may be the TPS or something since I have Idel sticking issues... that I cant tune out with the Idle control valve or timing at the Distributor.
IF anyone has any kinda suggestions to check or comments let me know.
I was going to just redo the exhaust but since I'm swapping RB20det in I'm not to worried about it just kinda would like to figure out whats going on because it drives me nuts when I step on it in traffic and it takes off then just starts cutting and POPing...
Thanks guys.
Cutting out and poping at random over 4k?
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nametakennow
- Posts: 10024
- Joined: Sat Aug 24, 2002 4:14 pm
- Car: '06 MINI Cooper S
Because the SR20de is a RWD version of the SR20de that came in the FWD cars here.
Its only similar RWD counterpart would be the KA24de but I had also posted there.
As for the question at hand, I never noticed this problem until the exhaust was put on. So I was thinking maybe the lack of back pressure was causing some issues with the Fuel and ignition.
Though if it isn't exhaust then what kinda things should I go about checking? This weekend I plan to check the TPS values and maybe get new spark plugs as they may be fouling out. Other than that I do not really know where to start.
Its only similar RWD counterpart would be the KA24de but I had also posted there.
As for the question at hand, I never noticed this problem until the exhaust was put on. So I was thinking maybe the lack of back pressure was causing some issues with the Fuel and ignition.
Though if it isn't exhaust then what kinda things should I go about checking? This weekend I plan to check the TPS values and maybe get new spark plugs as they may be fouling out. Other than that I do not really know where to start.
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nametakennow
- Posts: 10024
- Joined: Sat Aug 24, 2002 4:14 pm
- Car: '06 MINI Cooper S
It's still the RWD engine and has far more relation to the RWD DET, which is the section this should be in (or 240 Technical). Furthermore, FWD engines came in DET form too, so this isn't just a DE section, it's a FWD SR section - period.
No need to double post.
Regardless, an engine is an engine, so here's my input:
It can't be the exhaust. Why would an exhaust that's MORE open cause backfiring? You don't have a second O2 sensor either, so it's not that. You may notice it more now because your exhaust is louder.
TPS and plugs are a good place to start for sure. I'd also check the MAF.
No need to double post.
Regardless, an engine is an engine, so here's my input:
It can't be the exhaust. Why would an exhaust that's MORE open cause backfiring? You don't have a second O2 sensor either, so it's not that. You may notice it more now because your exhaust is louder.
TPS and plugs are a good place to start for sure. I'd also check the MAF.
well, You are ping ping ponging me... here man.When I post in RWD sr20det forum I get told to post in FWD forum. When I post here your telling me to Post there... So I'm guessing there needs to be a RWD Sr20de Forum section. I'm just trying to get help.
As for your input: Yeah, I figured the exhaust being completely straight through wouldn't have a effect like this one.
I was thinking MAF also, for sure im doing plugs and TPS.
Do you know of any fuel cut off if the engine reaches a given temperature. I some times see highs as 90D celc but most the time i'm at 80D celc. 80 is when the Thermo opens and 90 is like 210Df.
As for your input: Yeah, I figured the exhaust being completely straight through wouldn't have a effect like this one.
I was thinking MAF also, for sure im doing plugs and TPS.
Do you know of any fuel cut off if the engine reaches a given temperature. I some times see highs as 90D celc but most the time i'm at 80D celc. 80 is when the Thermo opens and 90 is like 210Df.
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adrianfromthecastle
- Posts: 18849
- Joined: Wed Jun 29, 2005 5:36 am
- Car: 1992 Nissan 240sx
- Location: California
Re: (uvamosk)
wrong forum (you have a 240 for goodness sake)
anyways, I'm pretty sure its your mafs. check wiring or get a new mafs. The sensors are pretty sensitive, so once they mess up, theres no turning fixing it.
anyways, I'm pretty sure its your mafs. check wiring or get a new mafs. The sensors are pretty sensitive, so once they mess up, theres no turning fixing it.
Yeah, but we are all in the same domain Nissan.Its a 240sx but it still has a Sr20de which is closer to your SR20 than any USDM 240sx ever had LOL.
anyway.. Maf huh...
I'm guessing I could use the maf off a FWD Sr20de? you guys think?
I'll check the numbers and see if they match or not. Other than that any other ideas?
The sticky IDLE thing I mentioned is: I'll rev it and it will stick at 1.2k for a few secs then just drop to 900rpm... unless i jab the throttle and then it will drop to 900rpm almost all the time. Thats why i suspected TPS since it seems like its being picky..
thank you all though for your help ^_^
anyway.. Maf huh...
I'm guessing I could use the maf off a FWD Sr20de? you guys think?
I'll check the numbers and see if they match or not. Other than that any other ideas?
The sticky IDLE thing I mentioned is: I'll rev it and it will stick at 1.2k for a few secs then just drop to 900rpm... unless i jab the throttle and then it will drop to 900rpm almost all the time. Thats why i suspected TPS since it seems like its being picky..
thank you all though for your help ^_^