Freakin car not revving out... plus other problems.

[USDM_OneVia]

On going problem since day 1. The car will not rev all the way out. It is either hitting fuel cut or almost like a speed cut.

I took it out today, nice cool day, upper 60's. Just going to cruise on the way home from work. Welp... on some back roads and I come to a stop sign. I let the clutch slip a bit to launch it about about 2 or 3 pounds of boost. Launches fine, boost is ok... then all of a sudden, the engine cuts out.... ****!!... let off the gas, then shift into second. Give it about the same amount of throttle (1/4) revs up... boosts to about 7.5 pounds.... engine cuts. WTF???

I was out with Jon the first night I met him, and he took me out in his car and he hit fuel/boost cut. It was pretty violent and sounded almost like you hit the rev limiter.. like bang, bang, bang, really rapidly. My cut off is more like the speed govenor. When trying to go faster than 114 mph, the car just shuts down, no amount of throttle is going to help it, it just won't respond. That is the best way to describe it. Hell... I was pulling onto the highway a few days ago following my buddy in his Civic DX and I was going to blow right past him.... but no, freakin "ghost cut" stopped the from happening.

ECU shows a code 55..... DET sensor hooked up..... timing at 17 degrees.... new plugs. I am stumped. This is seriously making me want to just sell the damn motor and get an SR. I've had it...

Also when right around the 0 on the boost gauge, there is a slight hesitation/surging going on. More than likely a boost leak in my ghetto *** intercooler piping, so I don't read too much into that.

Cold starts...... car idles at like 500 rpms. If I blip the throttle, revs will go DOWN not up, but the boost gauge shows 18 inHG and will go to 0 when bliping the throttle. If I let it sit a second while holding down the throttle a bit, it will start to smooth out enough so I can drive it. But until it is warmed up, it is very sluggish on the bottom end, surge's, and will go from like 0 boost to 5 real quick and throw me back in the seat. Once the car is warmed up though.... runs great, no surging on the bottom end, boost is good, no sluggishness, and will idle at 750 rpms on a hot start, just doesn't like cold starts.

One last question.... when driving basically pretty sanely, i.e. to work in light traffic. I will rev 1st gear out to 4000 rpms, but only have about 2 psi of boost, but when I shift into 2nd, it will boost up to 6 pounds, and then shifting into 3rd, it will do almost 8 pounds. Is that normal? I've never had a turbo'd car before, so this is all new to me.

Geez.... I sound like such a freakin noooooooob.

Joe

[slw240sx]

joe call me in the morning or when you see this ill try calling if you work then ill come down around .

i want to swap actuators and see if thats it,

then we are goin to set your TPS

joe i also have that freaking surge/hesitation at near 0 vacum, try turning your MAF screw clock wise half turn at a time, richen it up some ! in the FSM is says hesitation/surging is cause by a lean mixture.

also we will have to get an AAC valve and Airbypass valve(air regulator ) see if we cant get your cold start engaging .

Quote »One last question.... when driving basically pretty sanely, i.e. to work in light traffic. I will rev 1st gear out to 4000 rpms, but only have about 2 psi of boost, but when I shift into 2nd, it will boost up to 6 pounds, and then shifting into 3rd, it will do almost 8 pounds. Is that normal? I've never had a turbo'd car before, so this is all new to me.[/quote]joe this is normal in the turbo car! mines the same way, although i think you have a small boost leak. you have the NPR on it yet??? you have a BOV yet?

do you think the car would make the 45 min drive up here? we could do some work in my drive way and a 24hr autozone to help out

i know how you feel about soundign like a noob, im having alot of the same problemns right now and feel dumb for not knowing the answers

[slw240sx]

also i have a bad cutout/miss at part throttle. like the motor isnt getting fuel at a certain throttle position, if it cuts out i can press the pedal to the floor and it does nothing at all i have to let off the gas then press it to get it to respond again .

sound like a bad TPS???? or bad pump or FPR?

[Wreckless]

Sounds like a very possible boost leak to me, dumping off metered air does all kinds of crappy things to a car's performance. Dont play with your AFM until you're sure you dont have a boost leak. Double check all fittings, and if you find anything remotely loose, take it off and clean any oil that might have built up in the slack there to ensure a solid seal. If you're running a catch can, you dont need to worry about this.

For the crappy cold start, check if there's an engine temp sensor that isnt reading properly. Happened on my MK3 turbo supra and made her a ***** to drive when she was cold.

If its not an intake leak causing the stumbling, check the spark plugs and make sure you've got them gapped well, I dont know about the CA specifically but I know that a friend had partial throttle and full throttle stumbling issues with an SR20 caused by too wide a gap on the plugs. Try gapping around .30mm or .28mm. Also make sure your AFM is a good distance (~12") from the turbo.

Check the FPR by pulling the vaccum line to it and see if that improves anything when the car is running, if it does, check base fuel pressure and make sure its good I dont know what its supposed to be on the CA but someone around here outta know or you could look it up.

Also try unplugging the O2 sensor and see if that improves anything, if it does, it needs to be replaced.

That's all I can think of, good luck with your fix.

[USDM_OneVia]

Yeah the NPR is installed and no BOV yet. Don't see the need for one as of yet. I am putting my funds towards a GReddy front mount (which I should have done in the first place) and getting rid of the NPR. It's a nice intercooler, but I don't have the time for the downtime on it to get it to fit/work properly.

I honestly think a lot of it is still in my wiring. I really need to find time this weekend to go back through it and solder/heat shrink everything up.

Since I did not keep the A/C in my car, I didn't hook up the A/C wiring in the harness.... could this possibly have anything to do with anything?

Joe

[boost_boy]

If I had the chance to service all of you guys' cars, I can almost guarantee ya'll won't be having these dramas. These are very funny acting engines that depends on heavily on that nissan ecu and AFM. But little things will contribute to your driveability such as the fact that "USDM_OneVia's" car idles at 500 rpm upon cold start depicts a problem in his idle control section or wiring. Which NPR do you have? If it's the big one, it'll perform just fine and is very sufficient.

[slw240sx]

DEE. im learing slowly we spent 9am till 3am on my car today building a custom 3" exhaust and fixing up my oil return line for my turbo , then found a vacum leak, my BOV sucks!!!!! its leaking air after shifts time for somthin bettter. donot buy turboXS BOVs

joe, i have a person comming down from cleavland to see his motor, you want to come up here for a bit and hang out and swap wheels??? think the CA will make it? then we can work on yours for a while and sort out some bugs

[Wreckless]

If your BOV is a TXS RFL, a friend of mine had a similar problem. His BOV kept getting unresponisive, and he kept backing out on the preload setting, then finally he couldn't back it out anymore and it ended up leaking boost.

You need to take it apart and lube it with lithium grease or WD-40 or pretty much anything. It will need this from time to time. That fixed his, give it a try on yours.

Although I must admit that I like my HKS SSQV much better.

[slw240sx]

yeah im switching i have a type 34h

[USDM_OneVia]

DEE. im learing slowly we spent 9am till 3am on my car today building a custom 3" exhaust and fixing up my oil return line for my turbo , then found a vacum leak, my BOV sucks!!!!! its leaking air after shifts time for somthin bettter. donot buy turboXS BOVs

joe, i have a person comming down from cleavland to see his motor, you want to come up here for a bit and hang out and swap wheels??? think the CA will make it? then we can work on yours for a while and sort out some bugs

I am off Wednesday and Thursday. It might make it. I followed Kevin from my house to Kings Island so he could look at his 100 dollar 240 Coupe project.... that bastard finds ALL the cars.

Shoot me an email or IM me if you are ever on during "normal" hours

Joe

[rco8786]

On going problem since day 1. The car will not rev all the way out. It is either hitting fuel cut or almost like a speed cut.

I took it out today, nice cool day, upper 60's. Just going to cruise on the way home from work. Welp... on some back roads and I come to a stop sign. I let the clutch slip a bit to launch it about about 2 or 3 pounds of boost. Launches fine, boost is ok... then all of a sudden, the engine cuts out.... ****!!... let off the gas, then shift into second. Give it about the same amount of throttle (1/4) revs up... boosts to about 7.5 pounds.... engine cuts. WTF???

I was out with Jon the first night I met him, and he took me out in his car and he hit fuel/boost cut. It was pretty violent and sounded almost like you hit the rev limiter.. like bang, bang, bang, really rapidly. My cut off is more like the speed govenor. When trying to go faster than 114 mph, the car just shuts down, no amount of throttle is going to help it, it just won't respond. That is the best way to describe it. Hell... I was pulling onto the highway a few days ago following my buddy in his Civic DX and I was going to blow right past him.... but no, freakin "ghost cut" stopped the from happening.

ECU shows a code 55..... DET sensor hooked up..... timing at 17 degrees.... new plugs. I am stumped. This is seriously making me want to just sell the damn motor and get an SR. I've had it...

Also when right around the 0 on the boost gauge, there is a slight hesitation/surging going on. More than likely a boost leak in my ghetto *** intercooler piping, so I don't read too much into that.

Cold starts...... car idles at like 500 rpms. If I blip the throttle, revs will go DOWN not up, but the boost gauge shows 18 inHG and will go to 0 when bliping the throttle. If I let it sit a second while holding down the throttle a bit, it will start to smooth out enough so I can drive it. But until it is warmed up, it is very sluggish on the bottom end, surge's, and will go from like 0 boost to 5 real quick and throw me back in the seat. Once the car is warmed up though.... runs great, no surging on the bottom end, boost is good, no sluggishness, and will idle at 750 rpms on a hot start, just doesn't like cold starts.

One last question.... when driving basically pretty sanely, i.e. to work in light traffic. I will rev 1st gear out to 4000 rpms, but only have about 2 psi of boost, but when I shift into 2nd, it will boost up to 6 pounds, and then shifting into 3rd, it will do almost 8 pounds. Is that normal? I've never had a turbo'd car before, so this is all new to me.

Geez.... I sound like such a freakin noooooooob.

Joe

Sorry i didnt read the whole post(it was long) but maybe it's your fuel pump giving out?

[USDM_OneVia]

Brand New Walbro 255. Put in with the motor. The motor has never seen the stock fuel pump.

Right now I am leaning towards....

Slight Vacuum leak going to the Air Regulator for the Cold Start.... my fastback did this too.

Boost leak around the throttle body from my GHETTTOOOOO *** install for my NPR intercooler.

O2 Sensor taking a dump for the part throttle miss and 0 psi miss, along with the boost leak.

****ty wiring for the cut out. Jon and I were doing the wiring in the freakin rain and we wanted to get done and get dry. I had every intention of going back and soldering the wires. So I think that is a major contributing factor right now.

I am going to spend all night Tuesday and all day on Wednesday getting the wiring done and miscellaneous work done to the car. Then hopefully next week I should have the fundage together to get my GReddy FMIC, hot pipe, and Type S BOV.

I've got brand new NGK BCPR6ES-11's sitting in the passenger seat ready to be installed. Going to change out the o2 sensor at the same time too. Give the MAF a once over and clean out the filter. Then reset the timing to about 16 degrees and see how she runs. It's at 17 now, I backed it off a bit since the NPR intercooler may be getting heat soaked being behind the radiator, but that was the best I could do at the time.

Keep y'all posted..... if it doesn't work out..... thermite in the number 2 cylinder.

Joe

[slw240sx]

joe, tried callin you sunday night, but i got the machine, i figured football was on and you didnt want to mess with teh car, im free thurs all day if you want to get a early start on it let me know i can be down there around noon, i want to show you my new exhaust. and have a crack at making a new intake pipe

[USDM_OneVia]

Thursday it is then. I will start in on my wiring tonight and do a bunch of little crap while I can.

Oh yeah..... football was on Love my Titan's!!!

Joe

[slw240sx]

do me a huge huge favor!!!! put the 7spokes on the beater and the 17s on the silvia. lol. then when i come down ill give you my 7spokes and take the 17s , i need them for thurs nights "touring" run we are doin back here in dayton. i also got a change my pads and bleed the brakes too.

[USDM_OneVia]

Just thinking that myself. When the wife get's home from work, I will swap them out then.

BTW.... answer your damn IM!!!

Joe

[slw240sx]

IM AT WORK!!! we dont have the internet at work, so you say how am i posting this >??? cause i just stoppedin at the house for a second. lol , leave me an im with what time your thinkin youll be up im thinkin i can be there by noon or 1pm at the latest.