ok, someone come and fix my problem.

I have a 99 prelude with JRSC. i started getting the code 43 (too lean) after i replaced teh shortblock. A rod went through my first one. But anyways, stock JRSC setup with FMU. So far i've changed out the primary o2 sensor, even though I never got the code 1 for it,i've heard that when they start to go it can be messed up. that didn't work, then i changed out the JR walbro 255 high pressure for another walbro 255 hlp, same results. I have vacuum going to both the FMU and the rising rate regulator. all hoses are correct. Sometimes it runs perfect, then the CEL will come on and boom it will not idle at all any more. basicly you push in the clutch and it dies. i'm getting around 18mpg now, where i normally got around 24mph. The cat has been replaced, when the new shortblock when in.

people will say, do a fuel pressure test, well i would do it, yet I bought a GE fuel line, B&M gauge, a stainless steel line from stan and guess what, the JR sandwiches in the fuel rail and the GE rail wont fit.

I even swapped out the EVAP purge valve from another car and no change. I cleaned out my old EVAP purge vavle and put it back on, it ran ok for a week or so.

Things I've noticed: 1. there is no pressure behind the gas cap anymore, i bought a new gas cap form honda, same results. My only guess now is that, well excess pressure is bledding out and it can't idle.

oh yeah, changed out plugs a couple weeks back, they were all brown. There was been an instance when i went to check them and 1&3 were a little lean, while 2&4 were perfect. this makes no sense. I just got my new cap/rotor/new NGK plug wires to put on it.

Fuel filter was changed during shortblock swap. Head was taken to machine shop and examined to be perfect during swap.

i think its either an evap thing or an injector is dying. I would appreciate any help out there.

oh yeah, i've got a VAFC wired up, i've increased the amt of fuel to like 5% more fuel and same results always. I figure i'd install my new EGR 02 eliminator soon, to kill the second o2 sensor, then gut the cat, cause i think it could be backfiring, but not sure since the cat quiets things down.

I also wondering if it couldn't be related to maybe the alternator. I've noticed at night, when I pull to a redlight that my lights dim with the stereo on(I don't have anything crazy, i would consider it a normal setup, Headunit, amp, 12in sub, amp is only 450 rms watts.) I just replaced the battery.

 

Ok, let me point out a couple of things for you here.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">i started getting the code 43 (too lean)</TD></TR></TABLE>
You must mean code 45 because there is no trouble code 43 for the 5th gen lude (verified by the Helm manual, which is sitting in my lap right now). If you are indeed getting code 45, this trouble code is for both too rich or too lean.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">oh yeah, changed out plugs a couple weeks back, they were all brown. i'm getting around 18mpg now, where i normally got around 24mph.</TD></TR></TABLE>
My guess would be that you are running way too rich, not too lean.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">stock JRSC setup with FMU. people will say, do a fuel pressure test, well i would do it, yet I bought a GE fuel line, B&M gauge, a stainless steel line from stan and guess what, the JR sandwiches in the fuel rail and the GE rail wont fit.</TD></TR></TABLE>
Well, you are going to have to install a fuel pressure gauge somehow. Fuel pressure IS your fuel delivery in your setup, and to get things set up properly you need a gauge. Fuel pressure is the very FIRST thing I would troubleshoot in your situation, as it is most likely your problem. You could get the AEM rail for your gauge, it fits between the blower and the intake manifold. You could also have installed the B&M gauge on your fuel filter, although with the blower in the way now that will be difficult (but not impossible).


Modified by sharkcohen at 3:21 PM 3/9/2004

 

yes code 45, sorry.

only reason I say too lean is, that well on a OBD2 scanner it reads out too lean.

but its code 45, maybe a mod can change that for me.

I was thinking about the AEM rail, but didn't know, i think my next step may be to just tap the stock rail and put the gauge in it. Then maybe put in some 310cc injectors and lean out the mixture via the VAFC or lower teh fuel pressure some, which is my goal.

Edit: also, the car ran perfect until the old shortblock called it quits. Basicly the rod said nevermore and left cruising down the highway at 3k rpms going 60mph.

 

are you using a HONDA O2? or some crappy aftermarket universal?

 

original 02 was a honda, then swapped out with a Bosch universal. it did the same thing with the stock honda one, as with the next one. So I don't think that has much to do with it.

 

You say your still running the FMU? Have you checked it out yet? Sounds like your running more fuel pressure when not in boost which could be the FMU.

 

Also what are the condition of the plugs?

 

car runs perfect in boost, its really teh off boost response, i'm workin to get a new fuel rail at the moment, so i can test teh fuel pressure and see what the fuel pressure is. I've called JR, but it wasn't much help, they thought it could be electrically or having the FMU lines switched. I pointed out that it runs fine at WOT, no ping, i'm pulling .6 degrees of timing per psi, plus i've went over 11k miles since teh swap. its just a sparatic problem. I'm starting to think the stock header i put on may have a massive exhaust leak, tonight at taco belt i heard a leak i think. Although a few weeks back when i changed out the brakes, i climbed under teh car and found no leaks around the the flex pipe or after the header. Also i'm running a stock header now, so i may just throw the kamikaze back on. I had ordered a DC sport header from Camp1320, but he send me one for a 96 vtec, so it was shipped back on sunday.......

this car is becoming a curse....

plugs are perfect when I pulled them out. Its only been like 800 miles, no crazy changes, i would imagine. I just got the R56XX-8 plug, maybe i'll try that when i do the new cap/rotor.