SR hesitation problems :/

[tamimichix]

hey everyone i've been having problems with my SR lately. it hesitates at high rpms and i've tried a bunch of things to see if i can finally get it to run right. well it happens in certain situations like: sometimes i'd just be in 2nd or 3rd and want to accelerate and when i push the throttle it starts cutting out or when i'm on the highway and i'm in 5th and downshift i dont get immediate response. it starts cutting out and i have to go back up to the higher gear cause the cutting out wont stop.

for the longest time i thought it was my maf, or the wiring for it. but today i got it situated and rewired the entire thing. and i also replaced my fuel filter with a new 300zx one... i drove it around on the streets and on the highway and it was fine for a bit! but just as soon as i was taking my car home it starting cutting out again. i love my car so much and it totally SUCKS when it hesitates because I love the feeling of being shoved back into my seat but my baby just doesnt wanna push ;__;

is there anyone out there who can help me??? any opinion will help. thanks!!~~ :hs:

[street240]

Did you take a check the actual maf itself or was it just a rewiring job?

[tamimichix]

Did you take a check the actual maf itself or was it just a rewiring job?

yah i did. in fact i've changed the maf multiple times so i know it's not the maf or the wiring :/

[gorgasm]

yeah it was, maybe someone will actually give her some help now since guys on this forum pitch tents the mention female is mentioned

get new plugs/wires/distro cap/rotor

[DLo Eric]

yeah it was, maybe someone will actually give her some help now since guys on this forum pitch tents the mention female is mentioned

get new plugs/wires/distro cap/rotor



She said it was an SR. Your disco cap will do nothing. :rofl:

[drift into a curb]

I think if you had maf problems, it'd be bogging all the time. You can try cleaning the maf hotwire with Berrymans or some type of electrical contact cleaner. Also check your TPS (throttle position sensor).

oh yeah, check your spark plugs, coil packs. Cutting out seems like the ECU stepping in. It seems like a basic maintenance problem.

[ronmcdon]

hmmm interesting. sorry no advice here but i have a similar prob with my s14sr, but only its only during the first 5 mins after starting my car. basically it pulls good until about 6k, then power delivery cuts out all of a sudden. after 5-10 mins of regular driving, the car feels ok.

may learn something from this thread. subcribed.

[drift donkey]

check all of intercooler pipping for leaks. I had a intercooler pipe come lose and it pretty much stopped me in my tracks.

[tamimichix]

would a little bit of the specs on my car help at all? blacktop sr, koyo, 2.5'' HKS HiPower, flex a lite fans, excedy clutch, nismo 2 way, walbro, hks ssqv, greddy intake.. 3'' downpipe and gutted cat

umm what about if the stock bov could leak out air if there is no vacuum hose connected to it. alsooo i've got a 3'' downpipe, a gutted cat and im pushing stock boost

[usdm180sx]

yeah it was, maybe someone will actually give her some help now since guys on this forum pitch tents the mention female is mentioned

get new plugs/wires/distro cap/rotor

sr doesn't have a distributor/cap.

[jspecusa]

i'm sure you didn't do the swap yourself.
why don't you go to the shop/person that did the swap and
trouble shot it.
anyone can do a sr swap, the hardest part of a swap is trouble shoting.
good luck

[tamimichix]

i think i'll be taking the car to a shop soon. payday cant come soon enough. thing is i also need to get my car looked at by a frame shop too so my money's going down the drain.but i just hope that i can finally get all this sorted out, i just dont know anyone else who's experiencing what i am with my baby :/

yes, i did search. yes, i did try a lot of things. i've put a lot of days off trying to figure out what's wrong with my car, so please dont judge me just because i didnt first post my life story about my car. i just needed a little help, and anything will do

[youngmanvr4]

yup im a chick indeed haha :P have anything that could help me out?

I'm still new to SR's so I dont have alot of experience with them yet.
In my KA before I put my S14 SR in I would have something almost like a fuel cut off...not just a hesitation but a total cut off. It was so harsh of a cut off that it would jolt you forward if you weren't ready for it.
I never figured out the problem but I was throwing codes. I cant remember the codes I was throwing but I know it was a fuel delivery problem.
Though yours doesn't sound as harsh as mine was but maybe it could be a fuel starvation problem?
Have you checked your spark plugs for blow out? When I bought my vr-4 I had spark blow out. It would have a little hesitation at certain times. All I did to fix that was new cooler plugs and a little lower gap and haven't have a problem since. This is another possibility.
I would check into timing too. Again I dont know alot about SR's but if your timing is off to much under acceleration your engine could have to retard the timing alot is its advanced to much. This might cause a hesitation? Someone else more wise than me could answer if that could cause it.
I am just throwing things out.
Hope this helps a little or gives you ideas.

[tamimichix]

I'm still new to SR's so I dont have alot of experience with them yet.
In my KA before I put my S14 SR in I would have something almost like a fuel cut off...not just a hesitation but a total cut off. It was so harsh of a cut off that it would jolt you forward if you weren't ready for it.
I never figured out the problem but I was throwing codes. I cant remember the codes I was throwing but I know it was a fuel delivery problem.
Though yours doesn't sound as harsh as mine was but maybe it could be a fuel starvation problem?
Have you checked your spark plugs for blow out? When I bought my vr-4 I had spark blow out. It would have a little hesitation at certain times. All I did to fix that was new cooler plugs and a little lower gap and haven't have a problem since. This is another possibility.
I would check into timing too. Again I dont know alot about SR's but if your timing is off to much under acceleration your engine could have to retard the timing alot is its advanced to much. This might cause a hesitation? Someone else more wise than me could answer if that could cause it.
I am just throwing things out.
Hope this helps a little or gives you ideas.

yah this helped me out a lot thanks so much. i'm ordering spark plugs now so hopefully that'll help my situation somewhat :]

[mandoz85]

I had a similar problem when i first swapped in my SR, all i did was readjust my TPS and the problem went away. check your voltage per the FSM and readjust if needed.

[tamimichix]

I had a similar problem when i first swapped in my SR, all i did was readjust my TPS and the problem went away. check your voltage per the FSM and readjust if needed.

hey thanks for the advice! now.. how would you adjust your tps?

[youngmanvr4]

*Note* This is for a s14 sr so you may want to check the s13 sr FSM for how to do this but this gives you the idea.*

http://i86.photobucket.com/albums/k102/youngmanvr4/howtoadjusttps.jpg

[yojimbo206]

I'm having a similar problem w/ my redtop SR. It's really random I'll be driving it and it will bog down and run terrible. if you put it in neutral and rev it it comes back to life, just a pain when i'm driving around. I think its a problem with the fuel system but i've been playing with that for a while. I put some fuel injector cleaner in it and it ran no problem for a while so and now it's back to crummy so i'm picking up a new fuel filter tomorrow.

i feel for ya, i LOVE my car but its killing me not knowing whats wrong.

[cornloaf]

check the gap on ur spark plugs

[tamimichix]

check the gap on ur spark plugs

that's what i'm doing next. i also just ordered some NGK spark plugs

[S14monkey]

ok i had almost this exact same problem with my sr not to long ago. My car would hesitate and sputter under hard acceleration on every gear except 1st.
things you should look into:

boost leak
spark plugs
timing
maf
o2 sensor
cas
tps
coil packs

the problem with my car turned out to be one of my coil packs. try swapping each coil pack out one by one for one you know works fine. I initially ignored the coil packs beacause, i tested them all for voltage and they all came out with the correct amount, but i guess one of them was on its way out and couldnt handle the load under heavy acceleration.

I pretty much tried every possible solution i could find on zilvia and the very last possible solution i could find was the correct solution for my car.


anyway, good luck trying to fix your car. I know how much it sucks to mash the pedal and get absolutely nothing.

[tamimichix]

ok i had almost this exact same problem with my sr not to long ago. My car would hesitate and sputter under hard acceleration on every gear except 1st.
things you should look into:

boost leak
spark plugs
timing
maf
o2 sensor
cas
tps
coil packs

the problem with my car turned out to be one of my coil packs. try swapping each coil pack out one by one for one you know works fine. I initially ignored the coil packs beacause, i tested them all for voltage and they all came out with the correct amount, but i guess one of them was on its way out and couldnt handle the load under heavy acceleration.

I pretty much tried every possible solution i could find on zilvia and the very last possible solution i could find was the correct solution for my car.


anyway, good luck trying to fix your car. I know how much it sucks to mash the pedal and get absolutely nothing.

thanks so much for your input i'll be sure to look into all of that !! :]

[BobMelon]

i dunno why i'm helping but check the following:

1) coilpacks are working
2) ignitor chip is not shot

my car would sputter and cut out power under heavy load when my coilpacks were going bad and my ignitor chip was dead.

tipped the chip upside down and water poured out of it cause of my vented hood. put a new one in and problem gone. this time i tied a rubber glove around it so it won't get wet.

also post nudie pics for advice. one per word in this response.

**btw... "check plugs for feelings" was the best one yet**

[S13SilviaGirl]

i'm sure you didn't do the swap yourself.
why don't you go to the shop/person that did the swap and
trouble shot it.
anyone can do a sr swap, the hardest part of a swap is trouble shoting.
good luck



Yep, quoted for truth. Try the shop that did your swap. Also, no need to flaunt the fact that you are a 'girl'. If it is a legit question, then the guys here will help you. Throwing the girl card just gets the boys here in an uproar and makes it harder to get an actual answer to your question.

[fliprayzin240sx]

I just picked up a S14 right now and I pretty much got the same issue right now. The cars been sitting for a good 3-4 months so Im starting with the usual crap. Fresh gas with a bottle of injector cleaner, got a keyboard air cleaner thing and gonna spray the maf tomorrow. Im gonna try to find an electrical contact cleaner and see if that helps the maf. ALso gonna check the plugs. Also another thing that people didnt bring up is that, it also can be the o2 sensor or the ECU water temp sensor. If the ECU thinks the engine is cold, itll dump extra fuel causing it to bog.

[usdm180sx]

I just picked up a S14 right now and I pretty much got the same issue right now. The cars been sitting for a good 3-4 months so Im starting with the usual crap. Fresh gas with a bottle of injector cleaner, got a keyboard air cleaner thing and gonna spray the maf tomorrow. Im gonna try to find an electrical contact cleaner and see if that helps the maf. ALso gonna check the plugs. Also another thing that people didnt bring up is that, it also can be the o2 sensor or the ECU water temp sensor. If the ECU thinks the engine is cold, itll dump extra fuel causing it to bog.

Good to see that you're back in the game

[fliprayzin240sx]

Good to see that you're back in the game


yups, back after a 7 month hiatus. I get a car, first thing I do after i get home, im fucking busting tools. 30 mins after I get home, i fixed the bumper cuz the mounting shiet broke. Had to fabricate a metal bar to keep it up in the meantime. Pulled the Z maf and tried to blow shiet off it. Hopefully that was it, if not, imma have to dig deeper...

[bryce with a y]

check your couplers. YOU HAVE A BOOST LEAK.

[fliprayzin240sx]

Well I found a leak in one of the vaccum lines close to the manifold. Fixed that, still the same. I check the couplers that I can get to and sprayed soapy water on the couplers to see if its leaking. Nada. Im going to replace the plugs tomorrow.

Also can a bad TPS cause hesitation like this? Certain RPMs. I was messing around and I kinda nudge the TPS wire and the idle went up.

[koukimonster139]

i'm sure you didn't do the swap yourself.




lmfao




ahhhaaaaaa

[fliprayzin240sx]

Well I spent a good 3 hours at the hobby shop looking for leaks. I popped all the couplers off and even checked the turbo outlet gasket. Everything looked good. Took every single one of them off, cleaned them, checked for cracking or any prying. Nada. Checked the pipes to see if something rubbed off and nicked thru the aluminum pipings, nothing. Checked all the vacuum lines that i can find from the throttlebody and the Greddy manifold, all lines are good.

Before I left, I checked the timing. The CAS is pegged all the way advance. When i shot it, it was shooting on the first line from the right. Shouldnt it be on the 2nd line to be at stock timing? Can this be my culprit? I just dont see how the hell the timing will change when the cars sitting on the lemon lot for 3 months. I will try to pop the valve cover and double check the CAS timing and also, double check the grounding points, starting with the Z MAF grounding point.

Again this is a S15 engine, not sure if the timing will be different from an S13 that Im more familiar with.

[fliprayzin240sx]

Well re-did the timing and still the same shiet....I GIVE UP! Im taking it to a shop...

[auxoura]

:-/ :-/ I am also feeling a hesitation especially when it rains.

The car feels heavy and even the gas pedal feels heavier.

Occationally the pedal is heavy while in vacumm and when i builds boost, the padal lightens up significantly.....

Also the car is extremely sluggish...

Ive taken to a few shop but they ask me back whats wrong.....

Would really appreciate if you could post up fliprayzin240sx if you manage to find a solution...taking to the shop again tmr..

Btw...Im driving a 02' JDM Spec-r S15..:confused:

[rj240sx]

i have the same problem and im 99% sure it's a coil pack. i put all new spark plugs in, then pulled out the coil packs one by one. the first two i pulled bogged the engine pretty bad, then the next one i pulled didn't effect idle at all. in or out. i ordered some coilpacks(2) hopefully it should solve my problem. u should try that little test too. might save u a lot of time and money.
************UPDATE********** > CHECK THIS FIRST.. found out my problem. happened to be corrosion in the electrical connector on the coilpack harness. where it plugs in to the coil. sprayed um with electrical cleaner scrubbed a lil, and it runs like a champ. Check um, cheap fix!

[fliprayzin240sx]

i have the same problem and im 99% sure it's a coil pack. i put all new spark plugs in, then pulled out the coil packs one by one. the first two i pulled bogged the engine pretty bad, then the next one i pulled didn't effect idle at all. in or out. i ordered some coilpacks(2) hopefully it should solve my problem. u should try that little test too. might save u a lot of time and money.

Coilpacks on hold for now, Im running a S15 engine and I can only run those. theyre skinnier than S13/14 coilpacks. Its all good, I got a guy installing Power FC into the car and he said, hell fix and trouble shoot it too. Looking at Y170000 with D-jetro installed. :bigok:

[rj240sx]

************UPDATE********** > CHECK THIS FIRST.. found out my problem. happened to be corrosion in the electrical connector on the coilpack harness. where it plugs in to the coil. sprayed um with electrical cleaner scrubbed a lil, and it runs like a champ. Check um, cheap fix!

[s14dude]

same problems here.

MAF is good, plugs are new, one of the bolts for the coilpack broke off, so i might have a grounding issue, i heard coilpacks are horribly grounded.

no boost leaks. going to check the TPS next too. hope i fix it soon, i hate when my car runs like ca ca. =[

[fliprayzin240sx]

K today was trippy. All of a sudden, the cars not hesitating anymore. I drove off base today for the first time in over a week. Boost checked it and the damn thing didnt hesitate. It pulled hard enough that I kept loosing traction in 3rd gear...My guess is I fixed the problem, the ECU just didnt self-correct till just now. SR ECUs has this weird shiet where it kinda just gets used to things that you do to the engine. Thats the only explanation I can think of.