hey whats up guys. well over the winter i took my motor apart (redtop sr20det). changed major gaskets (cometic 1.1mm headgasket, intake gaskets, valvecover gaskets etc..). also upgraded cams to hks step 1 264 int/ex. and fp big28 turbo w/ taka lines. i know i did all the timing right by following the fsm. torqued everything to spec also. started up right away. sounded fine then it started to pup..... pup..... pup... then i would rev it and it would sound fine no mis-firing or anything. the only thing i can think of is the hks cams, the fat type o2 sensor (new from courtesy parts), or the fp big28 turbo.
do i have to upgrade my ecu because of the hks cams or bigger turbo? currently boosting only 7psi on the fp turbo.
also is it normal for the exhaust to have water droplets after not starting the motor up for 3-4 months?
i need help trying to get it up so i can take it to rockfalls. next month. if i have to upgrade my ecu im going to get injectors and maf upgrade since it is $500 for the ecu upgrade from enthalpy. any help would be great. thanks alot guys.
sr20det idling weird after upgrades... NEED HELP...
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climaxsr20
- Posts: 114
- Joined: Tue Apr 12, 2005 3:13 am
- Car: 1998 Silvia RedTop
Re: sr20det idling weird after upgrades... NEED HELP... (climaxsr20)
yes the water droplets are normal. don't worry about them unless they don't go away.climaxsr20 wrote:hey whats up guys. well over the winter i took my motor apart (redtop sr20det). changed major gaskets (cometic 1.1mm headgasket, intake gaskets, valvecover gaskets etc..). also upgraded cams to hks step 1 264 int/ex. and fp big28 turbo w/ taka lines. i know i did all the timing right by following the fsm. torqued everything to spec also. started up right away. sounded fine then it started to pup..... pup..... pup... then i would rev it and it would sound fine no mis-firing or anything. the only thing i can think of is the hks cams, the fat type o2 sensor (new from courtesy parts), or the fp big28 turbo.
do i have to upgrade my ecu because of the hks cams or bigger turbo? currently boosting only 7psi on the fp turbo.
also is it normal for the exhaust to have water droplets after not starting the motor up for 3-4 months?
i need help trying to get it up so i can take it to rockfalls. next month. if i have to upgrade my ecu im going to get injectors and maf upgrade since it is $500 for the ecu upgrade from enthalpy. any help would be great. thanks alot guys.
my guess is that its your fuel system. after upgrading your cams and turbo a walbro, FPR, some sort of tuning, and maf are pretty much requirements if you want it to run right.
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climaxsr20
- Posts: 114
- Joined: Tue Apr 12, 2005 3:13 am
- Car: 1998 Silvia RedTop
Re: sr20det idling weird after upgrades... NEED HELP... (karmakaze)
sorry this is off the topic but how did you recirrculate your hks bov? i have the hks bov and i want to recirrculate the bov. do i have to recirrculate it if i have an ecu upgrade?
more info. i do have a fpr and upgraded fuel pump. i dont have tunning. so im guessing thats it. i will be having it up this weekend and drive it for a bit and see how it feels and reacts to the driving and see if it'll be okay. if it doesnt go away ill probably upgrade ecu.
if you guys got anymore opinions or options for me please reply. thanks.
more info. i do have a fpr and upgraded fuel pump. i dont have tunning. so im guessing thats it. i will be having it up this weekend and drive it for a bit and see how it feels and reacts to the driving and see if it'll be okay. if it doesnt go away ill probably upgrade ecu.
if you guys got anymore opinions or options for me please reply. thanks.
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climaxsr20
- Posts: 114
- Joined: Tue Apr 12, 2005 3:13 am
- Car: 1998 Silvia RedTop
Re: sr20det idling weird after upgrades... NEED HELP... (climaxsr20)
oooh one more thing. my whole car chassis vibrates. i dont know if its my motor mounts + transmission mounts that are making it vibrate. my car is still on the stands so that might be it too... but its like having subwoofers thump really loud and my mirror vibrates like crazy. i have jgstools motor mounts and nismo transmission mounts. or all this could just be because of the first issue i brought up.
I've got HKS 264 step one cams and my engine shakes at idle once the car gets warm. When its cold, or just started, the idle is fairly smooth, but when it warms up you really start to hear the engine lope because of the cams. What is your idle set at? The cams will cause the car to pull less vacuum at idle and I found that instead of letting it idle at 700 like stock, bumping the idle to 900 helped to smooth it out. If you pop my hood when its warm, you can watch the motor shake but not enough to shake the car, but my mounts are still good.
Even with all the upgrades, the car SHOULD be fine at idle so its not a tuning issue. And yes, the cams will cause a rough idle and the exhaust kinda sounds like "pup, pup, pup,pup" when its warmed up. Using an air/fuel gauge you can actually watch the car be rich for a 2 seconds, then a quick lean, the rich again, but only at idle. Thats actually what causes the lope from my understanding.
One last thing to check, did you at any time remove the fuel injectors from the rail? If you did you could have a leaky injector o-ring which will cause a REALLY rough idle. Unplug the injectors, one at a time, and if you unplug one and nothing happens, there is something wrong with that injector. There should be a noticible difference when you unplug each injector.
If it would help, I can TRY to get a video clip of my car at idle, so you can compare sounds, and possibly the shaking motor.
Even with all the upgrades, the car SHOULD be fine at idle so its not a tuning issue. And yes, the cams will cause a rough idle and the exhaust kinda sounds like "pup, pup, pup,pup" when its warmed up. Using an air/fuel gauge you can actually watch the car be rich for a 2 seconds, then a quick lean, the rich again, but only at idle. Thats actually what causes the lope from my understanding.
One last thing to check, did you at any time remove the fuel injectors from the rail? If you did you could have a leaky injector o-ring which will cause a REALLY rough idle. Unplug the injectors, one at a time, and if you unplug one and nothing happens, there is something wrong with that injector. There should be a noticible difference when you unplug each injector.
If it would help, I can TRY to get a video clip of my car at idle, so you can compare sounds, and possibly the shaking motor.
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climaxsr20
- Posts: 114
- Joined: Tue Apr 12, 2005 3:13 am
- Car: 1998 Silvia RedTop
Re: (BaliLover)
hey thanks for the reply balilover. well its actually set at 900-950 for idling right now.
i think its shaking because of my upgraded motor mounts unless its because its still on the stands. guess we'll see what happens when i have it set on the ground with the wheels.
also i was going to pull the injectors out but decided not to so im sure its not the injectors.
the idling is not really rough just jumps up from 925-975rmp and makes the pup pup. im guessing its alright then.
do you have ecu upgrade?
also when i get a chance i will take a video of the car idling.
i think its shaking because of my upgraded motor mounts unless its because its still on the stands. guess we'll see what happens when i have it set on the ground with the wheels.
also i was going to pull the injectors out but decided not to so im sure its not the injectors.
the idling is not really rough just jumps up from 925-975rmp and makes the pup pup. im guessing its alright then.
do you have ecu upgrade?
also when i get a chance i will take a video of the car idling.
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climaxsr20
- Posts: 114
- Joined: Tue Apr 12, 2005 3:13 am
- Car: 1998 Silvia RedTop
Re: (climaxsr20)
well just called up enjukuracing and 240sxmotoring they both were helpful and had good service. they said that i should keep it at 1000 rpm since its mild cams and has less vac so by keeping it 1000 motor should run good. case close for the idle issue.
except for the chassis shaking still figuring that out. ill call up jgstools and ask them about that. thanks for the help guys.
except for the chassis shaking still figuring that out. ill call up jgstools and ask them about that. thanks for the help guys.
Re: sr20det idling weird after upgrades... NEED HELP... (climaxsr20)
there is an adapter you have to purchase that replaces the colored insert in the HKS SSQV. you then just run a line from this adapter to your intake after the MAF. its not something that you have to do, but it will keep your a/f ratio more constant and keep your car from smoking when you shift.climaxsr20 wrote:sorry this is off the topic but how did you recirrculate your hks bov? i have the hks bov and i want to recirrculate the bov. do i have to recirrculate it if i have an ecu upgrade?
more info. i do have a fpr and upgraded fuel pump. i dont have tunning. so im guessing thats it. i will be having it up this weekend and drive it for a bit and see how it feels and reacts to the driving and see if it'll be okay. if it doesnt go away ill probably upgrade ecu.
i really can not emphasize how important it is for you to get some sort of tuning done with your setup. your a/f ratio will be off and depending on what it is could cause bad problems down the road. plus it will get you significant power gains.
Modified by karmakaze at 9:50 AM 4/19/2006