------ stumped here, help!

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Nov 19, 2006 | 05:05 PM

#21

Slo_crx1

3.0 BAR

Joined: Aug 2003

Posts: 4,664

From: NE-PA

Re: ------ stumped here, help!

10-15 inches/hg of vacuum sounds more to me like cam timing or bent valves. But since you did a compression test, I'd say rule out bent valves and recheck that cam timing one more time. I run my b16 at +3 degrees advanced on the intake cam and it idles low with around 16 in/hg at idle. On the decel it makes over 30 in/hg. But if 3 degrees throws it off that much, think how much 1 tooth would be.

Nov 21, 2006 | 08:31 PM

#22

Jmunk

1.5 BAR

Joined: Oct 2004

Posts: 734

Re: ------ stumped here, help!

I've had something similar happen to me before, a bad oxygen sensor. Unplug it, if the car runs normal there is your problem.

Nov 21, 2006 | 09:21 PM

#23

Zeniceguycrx

3.0 BAR

Joined: Feb 2006

Posts: 3,905

Re: ------ stumped here, help!

its imposible to make over 30in in vac, thats a perfect vacume

Nov 21, 2006 | 10:51 PM

#24

JDMFantasy2K

3.0 BAR

Joined: Aug 2005

Posts: 1,654

Re: ------ stumped here, help!

Quote:

Originally Posted by Zeniceguycrx

its imposible to make over 30in in vac, thats a perfect vacume

yup, you guys need to realize that most gauges aren't very accurate, plus you need to take into account altitude and other weather related conditions.

Nov 22, 2006 | 02:33 AM

#25

Tough-guy

3.0 BAR

Joined: Jun 2006

Posts: 2,649

Re: ------ stumped here, help!

What's the fuel pressure? Kinked return line?

Nov 22, 2006 | 10:32 AM

#26

88crxSi

3.0 BAR

Joined: Feb 2003

Posts: 9,089

Re: ------ stumped here, help!

low vac also increases fuel pressure

Nov 22, 2006 | 05:12 PM

#27

Slo_crx1

3.0 BAR

Joined: Aug 2003

Posts: 4,664

From: NE-PA

Re: ------ stumped here, help!

Quote:

Originally Posted by crx88Si

low vac also increases fuel pressure

Another good point

Quote:

Originally Posted by Zeniceguycrx

its imposible to make over 30in in vac, thats a perfect vacume

It's according to my auto-crapper vacuum/boost gauge, not an actual calibrated instrument. But it does make a ---- ton of vacuum on a decel...enough to actually suck some of my thinner vacuum lines closed. I even had to replace the thin cheesy line that somebody ran for the brake booster because it was sucking itself closed :P

Nov 22, 2006 | 05:27 PM

#28

Smith-02

0.0 BAR

Joined: Apr 2006

Posts: 0

Re: ------ stumped here, help!

Quote:

Originally Posted by Tough-guy

What's the fuel pressure? Kinked return line?

i was gonna say FPR or possibly a bad fmu

Nov 22, 2006 | 06:40 PM

#29

ososlohatch

3.0 BAR

Joined: Apr 2005

Posts: 6,036

Re: ------ stumped here, help!

fmu ?? lol, read noobie i doubt he have uber and chrome with a fmu

Nov 27, 2006 | 03:06 AM

#30

jundoc

1.0 BAR

Joined: Feb 2005

Posts: 640

Re: ------ stumped here, help!

Quote:

Originally Posted by Anubis_4_99

well i've come to the conclusion that im fucked on this build

i've replaced everything but my injectors and fuel filter and it still runs like a ------ harley

bogs any time i hit the gas, rich as hell, etc

i've tested with 4 diffrent ecu's now, and none of them has made any diffrence

replaced my wiring harness, new dizzy, etc...

everything but my spark plugs, injectors, fuel filter, and fuel pump are new...

anyone with any ideas let me know, im truely ------ stumped

you should really check your injectors...i had an accord that did the same and it ended up being the injectors....