My mountain bike accelerates faster than my FC
08-22-03, 10:25 PM
#1
Coming to an AutoX near U
Thread Starter
Join Date: Jun 2003
Location: Port Huron, Mi
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
My mountain bike accelerates faster than my FC
HELP
So my car w/ mods listed below is still slower than my old 86 NA was. The problem is similar to the one in this thread https://www.rx7club.com/forum/showth...hreadid=173848
I’ve tried almost everything in the thread and can’t fix it.
The turbo spools like a ****.
The BOV releases plenty of pressure.
At this point it makes no sense to go above 3K RPMs because there’s ABSOLUTELY NO increased power beyond that point.
And sometimes, if I accelerate faster than that, I get a cloud of blue smoke behind me(but i haven't determined whether that is coming from the exhaust or under the hood where i have a small oil leak)
To me, it seems like the boost (compressed air) isn’t making it to the rotors (IE leak in the intake) or its too much boost (leaking on the side seals of the rotors)
I did a compression check.(close to 90s on both rotors and when releasing the pressure release valve, the compression peaks at 91)
I checked everything on the intake for leaks except the IC.
This is SERIOUSLY getting discouraging.
Any help/advise/ideas would be MUCH appreciated.
Thanks
- Jake
So my car w/ mods listed below is still slower than my old 86 NA was. The problem is similar to the one in this thread https://www.rx7club.com/forum/showth...hreadid=173848
I’ve tried almost everything in the thread and can’t fix it.
The turbo spools like a ****.
The BOV releases plenty of pressure.
At this point it makes no sense to go above 3K RPMs because there’s ABSOLUTELY NO increased power beyond that point.
And sometimes, if I accelerate faster than that, I get a cloud of blue smoke behind me(but i haven't determined whether that is coming from the exhaust or under the hood where i have a small oil leak)
To me, it seems like the boost (compressed air) isn’t making it to the rotors (IE leak in the intake) or its too much boost (leaking on the side seals of the rotors)
I did a compression check.(close to 90s on both rotors and when releasing the pressure release valve, the compression peaks at 91)
I checked everything on the intake for leaks except the IC.
This is SERIOUSLY getting discouraging.
Any help/advise/ideas would be MUCH appreciated.
Thanks
- Jake
08-23-03, 12:12 AM
#4
#1 Certified Cone Killer
Join Date: Mar 2002
Location: Battle Creek, MI
Posts: 936
Likes: 0
Received 0 Likes
on
0 Posts
Blue smoke means you are burning oil probably from the turbocharger cooling system. Your turbo might need to be rebuilt. I would search for blue smoke or turbo rebuild before trusting my advice though. I am pretty sure, but not positive. Don't go rebuilding turbos on my avice if there's nothing wrong. 
Trending Topics
08-23-03, 09:28 AM
#9
Turbo Driver
Join Date: Nov 2002
Location: Delaware
Posts: 615
Likes: 0
Received 0 Likes
on
0 Posts
Ever take into consideration the possibility of the cat(s) being clogged? It would totally kill the top end of the car.
Edit: I see you have an exhaust....I guess if that cuts out the cats, then my theory is out.
Edit: I see you have an exhaust....I guess if that cuts out the cats, then my theory is out.
08-23-03, 09:35 AM
#10
Coming to an AutoX near U
Thread Starter
Join Date: Jun 2003
Location: Port Huron, Mi
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Pinfield357
hows your idle?
do you have an aftermarket boost gauge?
hows your idle?
do you have an aftermarket boost gauge?
The car has a miss thats noticable at idle or long periods of acceleration.
It's just one problem after another, guys.
08-23-03, 09:46 AM
#12
Rotary Enthusiast
Join Date: Sep 2001
Location: Pittsburgh Pa
Posts: 1,417
Likes: 0
Received 0 Likes
on
0 Posts
id get an aftermarget boost gauge just to make sure that you are making boost?
and sounds like a vac leake to me but when i had mne i had a horrible idel usually wouldnt start
but if it didi and i took it out it wouldnt go intot boost unless i had a lot of room and was on it for like a min a least then it would slowly climb into boost
if you just going by the BOV sound thats not going to tell you much my BOV (HKS) goes off even if i let off the throtale and im not in boost
if this happened shoryl after installing your BOV check to make sure thats not leaking my bet would be it is
and sounds like a vac leake to me but when i had mne i had a horrible idel usually wouldnt start
but if it didi and i took it out it wouldnt go intot boost unless i had a lot of room and was on it for like a min a least then it would slowly climb into boost
if you just going by the BOV sound thats not going to tell you much my BOV (HKS) goes off even if i let off the throtale and im not in boost
if this happened shoryl after installing your BOV check to make sure thats not leaking my bet would be it is
08-23-03, 10:01 AM
#13
Coming to an AutoX near U
Thread Starter
Join Date: Jun 2003
Location: Port Huron, Mi
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Pinfield357
id get an aftermarget boost gauge just to make sure that you are making boost?
and sounds like a vac leake to me but when i had mne i had a horrible idel usually wouldnt start
but if it didi and i took it out it wouldnt go intot boost unless i had a lot of room and was on it for like a min a least then it would slowly climb into boost
if you just going by the BOV sound thats not going to tell you much my BOV (HKS) goes off even if i let off the throtale and im not in boost
if this happened shoryl after installing your BOV check to make sure thats not leaking my bet would be it is
id get an aftermarget boost gauge just to make sure that you are making boost?
and sounds like a vac leake to me but when i had mne i had a horrible idel usually wouldnt start
but if it didi and i took it out it wouldnt go intot boost unless i had a lot of room and was on it for like a min a least then it would slowly climb into boost
if you just going by the BOV sound thats not going to tell you much my BOV (HKS) goes off even if i let off the throtale and im not in boost
if this happened shoryl after installing your BOV check to make sure thats not leaking my bet would be it is
And I suppose I'll add an aftermarked boost guage to the list. Any recommendations?
Is it possible that my IC is leaking the boost or that the side-seals on the rotors are leaking?(given the symtoms above)
08-23-03, 03:19 PM
#15
Full Member
Join Date: Sep 2002
Location: Cumberland MD
Posts: 62
Likes: 0
Received 0 Likes
on
0 Posts
sounds like
Sounds like a bad motor. I would get a compression test done. If the turbo is good and it still runs like *** oil is always nasty could have a blown motor.
08-23-03, 04:31 PM
#16
Full Member
Join Date: Sep 2002
Location: So Cal
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
how are the injectors? up until a while ago my **** was fucked. I thought the motor was gone, cuz it seamed like i was one rotoring it (which i was) Then i noticed the genius before me had bad injectors, and had ******* did the resistor pack all wierd so i was running wut had seamed to be high and low impedence at once. I tested the injectors and found out that only one primary was working, and dont ****** get me started on my secondaries. I dunno check your injectors ( i know you have an s5 so u dont have to worry about the resistor pack)...its worth a try. And it was the only thing causing my car to run like **** and hesistate and have no power and all this bullshit. Now my car runs like a ******* beast!
08-23-03, 05:14 PM
#18
Coming to an AutoX near U
Thread Starter
Join Date: Jun 2003
Location: Port Huron, Mi
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Kuhrazy7
how are the injectors? up until a while ago my **** was fucked. I thought the motor was gone, cuz it seamed like i was one rotoring it (which i was) Then i noticed the genius before me had bad injectors, and had ******* did the resistor pack all wierd so i was running wut had seamed to be high and low impedence at once. I tested the injectors and found out that only one primary was working, and dont ****** get me started on my secondaries. I dunno check your injectors ( i know you have an s5 so u dont have to worry about the resistor pack)...its worth a try. And it was the only thing causing my car to run like **** and hesistate and have no power and all this bullshit. Now my car runs like a ******* beast!
how are the injectors? up until a while ago my **** was fucked. I thought the motor was gone, cuz it seamed like i was one rotoring it (which i was) Then i noticed the genius before me had bad injectors, and had ******* did the resistor pack all wierd so i was running wut had seamed to be high and low impedence at once. I tested the injectors and found out that only one primary was working, and dont ****** get me started on my secondaries. I dunno check your injectors ( i know you have an s5 so u dont have to worry about the resistor pack)...its worth a try. And it was the only thing causing my car to run like **** and hesistate and have no power and all this bullshit. Now my car runs like a ******* beast!
Would that cause low power, an engine miss, and blue smoke under heavy acceleration?
08-23-03, 05:15 PM
#19
Coming to an AutoX near U
Thread Starter
Join Date: Jun 2003
Location: Port Huron, Mi
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by 1SxyRXy
so wait. have you checked your cats yet or not? or did you already gut them
so wait. have you checked your cats yet or not? or did you already gut them
08-23-03, 05:18 PM
#20
Coming to an AutoX near U
Thread Starter
Join Date: Jun 2003
Location: Port Huron, Mi
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
Re: sounds like
Originally posted by Kyrol
Sounds like a bad motor. I would get a compression test done. If the turbo is good and it still runs like *** oil is always nasty could have a blown motor.
Sounds like a bad motor. I would get a compression test done. If the turbo is good and it still runs like *** oil is always nasty could have a blown motor.
Could it still be blown?
It seems like compression is great until about 3K RPMs,
then, to me, it seems like it's leaking on the side seals or the intake.
08-23-03, 09:29 PM
#23
Full Member
Join Date: Mar 2002
Location: some town
Posts: 99
Likes: 0
Received 0 Likes
on
0 Posts
I wonder why the oil would be so dark and smell of gas after only 2K miles... Does it smoke when you rev it in neutral? If you take off the oil cap does pressure or smoke come out while its running?
08-24-03, 09:02 AM
#24
Coming to an AutoX near U
Thread Starter
Join Date: Jun 2003
Location: Port Huron, Mi
Posts: 199
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Raymr
I wonder why the oil would be so dark and smell of gas after only 2K miles... Does it smoke when you rev it in neutral? If you take off the oil cap does pressure or smoke come out while its running?
I wonder why the oil would be so dark and smell of gas after only 2K miles... Does it smoke when you rev it in neutral? If you take off the oil cap does pressure or smoke come out while its running?
The only reason I can think for why the oil smells like gas(and is thinned out) so soon is that gas is blowing by the side seals. Nobody else has confirmed this yet though.
08-24-03, 02:44 PM
#25
Banned. I got OWNED!!!
Join Date: Aug 2003
Location: Nebraska
Posts: 143
Likes: 0
Received 0 Likes
on
0 Posts
it sounds like bad injectors to me, it might be dumping too much fuel in. Notice bad gas mileage at all? Other than TII's already getting bad gas milage in the first place.