Why wont my car rev past 3800? (not hesitation)
02-22-06, 05:41 PM
#1
Full Member
Thread Starter
Join Date: Nov 2005
Location: South Bend, IN
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
Why wont my car rev past 3800? (not hesitation)
Ok, so I recently finished my Turbo/NA project and was fairly sure that everything had gone as planned. The car fired right up and idled smoothly..so far, so good. I shut it down and left for the night. I went back two days later, and again, it fired up and idled fine, so i proceded to start leaning it out at idle to compensate for the 550's that were installed. Here's where the trouble started. Any attempt to lean it out caused the car to die, but at 0%, it ran fine (this is on a SAFC-II btw). It smells rich too, so i dont understand how leaning it out could make the car die. So anyway, I left the AFC alone, and decided to take the car on a test drive. As I pulled out of the driveway and started going down the road, the car wouldn't rev past 3800 or so. It's like it chokes, It just sputters and refuses to go any higher. Also, My boost guage gets to about 0 vac as if the turbo were trying to spool, but couldn't make any boost. Any ideas on what could be causing this? I feel like a complete *** after getting so hyped up about my car being done, and now it runs like crap 
.
BTW-> I have an AFR guage, but it isn't hooked up yet, so im not sure about the afr as of now.
Forgot to list mods:
4x550's (used) <- could be the problem???
255lph fuel pump
ihi turbo
custom exhaust manifold
tial 38mm wastegate
safc-II
. BTW-> I have an AFR guage, but it isn't hooked up yet, so im not sure about the afr as of now.
Forgot to list mods:
4x550's (used) <- could be the problem???
255lph fuel pump
ihi turbo
custom exhaust manifold
tial 38mm wastegate
safc-II
Last edited by Jeff_Ciesielski; 02-22-06 at 05:45 PM. Reason: Forgot Mods:
02-22-06, 05:52 PM
#2
I AM A THIEF!!! I AM A THIEF!!!
Join Date: Jan 2006
Location: Ontario Socal
Posts: 296
Likes: 0
Received 0 Likes
on
0 Posts
I installed a AFC2 on my s14, and about 2 months later my car wouldnt rev past 3600-3800 rpms. hooked it up to a scanner at school, it was throwing a maf code, replaced the maf, same problem. sold the car, but the guy who got it, got it running, now afc-less...
02-22-06, 06:14 PM
#4
Will it free rev past 3800?
This *screams* secondary injector problem to me. Either bad injectors, or not getting power, or... *something* that is making the secondaries not inject fuel.
Do you know for sure all 4 injectors work?
-=Russ=-
This *screams* secondary injector problem to me. Either bad injectors, or not getting power, or... *something* that is making the secondaries not inject fuel.
Do you know for sure all 4 injectors work?
-=Russ=-
02-22-06, 06:17 PM
#6
Full Member
Thread Starter
Join Date: Nov 2005
Location: South Bend, IN
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
I cant be sure they all work. The guy i bought them from claimed they worked when he pulled them from the car. I could try switching them with the primaries and see if that does anything, but how would that affect the leaning out of the idle?
02-23-06, 08:48 AM
#7
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
It sound like the SAFC is set up wrong. I'd remove it and go for a drive to see if there's a difference.
It's assumed that you don't have your lead and trail plug wires crossed and the lead coil is working.
It's assumed that you don't have your lead and trail plug wires crossed and the lead coil is working.
Trending Topics
02-23-06, 09:52 AM
#8
Senior Member
Join Date: Feb 2005
Location: Orlando
Posts: 391
Likes: 0
Received 0 Likes
on
0 Posts
my tII does the same thing but its right about 3000. if i let it idle for a long time its all good. im thinking its the injectors. ima blast it with a air hose and clean it the best i can
02-23-06, 10:22 AM
#9
Rotary Enthusiast
Join Date: Feb 2004
Location: Freeport, Maine
Posts: 1,225
Likes: 0
Received 0 Likes
on
0 Posts
check the injector grounds and all other grounds in the engine bay. I had the same problem when I bought my t2. I redid the grounds and added a few and it's worked great.
02-23-06, 03:06 PM
#12
Full Member
Thread Starter
Join Date: Nov 2005
Location: South Bend, IN
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
I recently changed the fuel filter, but the more I read about the grounds, the more it seems likely. I'm heading out to my garage tomorrow about 3 to start hacking at it. Thanks the the input guys 
02-23-06, 03:40 PM
#14
Junior Member
Join Date: Feb 2005
Location: west virginia
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
you might also want to check your egi, moine went bad and i couldn't get it to rv past about 3400 rpms, but if egi is fine def something to do with secondariesbut even with out secondaries you should be able to slowly rev it higher i know on mune my secondary connectors got knocked off or i just forgot to put them back on when i was working on it but it hesitated but still revved all the way up to 7000 rpms, not pretty but it did it,
02-23-06, 03:43 PM
#16
Full Member
Thread Starter
Join Date: Nov 2005
Location: South Bend, IN
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
I'm Def. gonna check the grounds and secondary connectors, but anyone have a clue as to why the safc would make the car **** out when i tried to lean it at idle??? I know that older NA FC's had purple topped injectors, but mine plugged right into my S5 harness. Dirty primaries perhaps??
Thread
Thread Starter
Forum
Replies
Last Post
fastrx7man
3rd Generation Specific (1993-2002)
33
09-02-15 09:42 PM
zuesskroph
2nd Generation Specific (1986-1992)
0
08-13-15 06:05 PM
