i just got finished swapping in a b16a into my si hatch, everything is good it's bogging out alot it even idles rough, when i drive it seems like i'm almost out of gas. the throttle cable seems fine. and all the sensors and vacuum lines are hooked up. when i hooked up the vacuum lines there are 2 lines that go into the intake tube and one big one that goes from the intake to the valve cover. since i'm using an after market intake there were not 2 holes for the vacuum lines so i used a t fitting and connected them to the line that goes from the intake to the valve cover. is this wrong? if so how do i hook them into the intake? i also used the si harness and a hasport subharnes for the vtech, when i hooked the wires into the ecu the directions said i needed to replace 2 wires but when i did it there were 3 wires i had to take out, the 3rd wire was on the bigger tan harness, and the pin was all the way at the end i'm not shure of the pin #, and the wire was yellow with a red dot. i'm not shure if that wire was to be replaced the directions seemed like that slot was to be empty?? also the resistor box came with the b16a engine so i changed it do i keep the si one it? and the ecu is not throwing any codes. i need help asap thanks josh

ps. there is mid grade gas in the tank still. also does the fuel pump need to be replaced or is it strong enough for the b16a engine?

 

what model civic?

 

91 civic si

 

bump

 

(please sort into paragraphs per each problem; that was a very hard read) What I can get out of that is,

One line usually goes from the intake tube to the valve cover. That's the oil breather. The other ones sound like they're the FPR (fuel pressure regulator) lines. I would trace everything. I don't remember a time when there were 2 lines coming from the intake tube; someone please correct me if I'm wrong.

If one does not exist for the oil breather, don't hook it to the others. Put pantyhose over the end of the hose to protect the oil from dust etc.

If the FPR lines are not hooked up properly, they will create the condition you describe, witl idle and the bogging. I did it myself lol. You will also throw a check engine I believe (edit: guess not). FPR lines have nothing to do with the intake tube at all.

p.s.


Modified by 31flavorscivic at 1:23 AM 12/21/2004

 

those vacuum lines on the intake won't make your car idle rough or bogg out.. it kinda sounds like the cam timing is off, like the timing belt is off a tooth or so.. make sure the cams are aligned correctly

 

fuel pump is adequate as well, i run a stock si pump with a GSR with no problems and gets me into the 12's

 

it should also still run/idle fine on midgrade gas, probably might start knocking in the upper RPMs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BuCKxWiLD &raquo;</TD></TR><TR><TD CLASS="quote">it should also still run/idle fine on midgrade gas, probably might start knocking in the upper RPMs</TD></TR></TABLE>

learn how to use the EDIT feature instead of making 3 different posts.

With my buddy's experience on gas here, 93 runs the best on his JDM ZC. 85 starts knocking and his car has problems idling, and 91 runs pretty darn good. Burn up the midgrade gas and put premium in from now on, my .02. Fuel pump will be just fine, even for turbo applications.

edit: you've prolly got 91 as midgrade over there in PA. Over here in bumfuck Idaho we have 85 as low, 87 as mid, and 91 as premium... With 1 station, serving a whole city, 3 miles out of town, that serves 93 as premium. PITA to get to.


Modified by 31flavorscivic at 2:17 AM 12/21/2004

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 31flavorscivic &raquo;</TD></TR><TR><TD CLASS="quote">
learn how to use the EDIT feature instead of making 3 different posts.
</TD></TR></TABLE>
Thanks for the tip

 

does anybody have a diagram on how the vacuum lines are run? and as for as the 2 vacuum lines going to the intake pipe. there are, they hook up to 2 round shaped housings. one is connected to the throttle body and the other is not.

i will take pics when i get home. i need this fixed asap because i'm driving the car and i do not want to ruin the engine.


Modified by plastik462003 at 10:58 AM 12/21/2004