Ok, seeing as how NOTHING can ever go right. I'm faced with another problem that I can't quite figure out. Lets start from the beginning shall we? Most of my problems started when all this occured. If you'd like to know all the back ground I'd suggest reading that post.

Now from there I have some how managed to a find totally new a different problem.

Symptoms: Car runs strong in lower RPMs(sub-4500) on and off boost. But then, I get sparadic leaning out. The car doesn't totally lean but, it jerks and surges when it get above 4500 in boost(9lbs). Although above 4500 out of boost it runs fine. Only does it when i'm accelerating. I've come to believe that it is a fuel delivery problem. Now I was driving home and noticing my A/F guage, while very lighty accelerating in 5th the A/F would look ok(stoich-rich), but have an very unnoticeable spike to total lean. You couldn't as much feel it, but you could see it on the A/F monitor. When pushed harder though it was a different story, more buck, detonation, etc Does it in every gear depending on the load, but 5th is easiest to notice.

Now, before all this started occuring I was trying *AGAIN* to wire up my 3 bar GM MAP sensor. How i've got the wiring wrong 2 times I'll never know. Anyways. I wired the GND and 5V refenece up backwards so the circuit was inverted. Hence the MAP thought it was MAX boost WOT = injectors at 100% duty cycle. How 100% duty cycle insn't good on injectors granted, it actually ran/idled, not well but it did.
Ok now here is the kicker, while running at idle the fuel pressure was at 1~2 PSI. I thought my guage was broke, now way could that be right. So I revved it up, fuel pressure still at 0, gas spaying out the tail pipe 10 feet or so. Then it ran slap out of gas.

So I put some gas in it from a can I had at the house(87 octane). And I reconnected my stock MAP sensor afterwards. Just plain wouldn't crank, so I swpped out plugs, the ones that I had been washing with gas just plain wouldn't spark. I reluctantly fired up, smoked and idle roughly then started to smoothen out. Ok so i took it up the road to see how it ran, and it started with the symptoms I described above.
~ Replaced the plugs.....no good
~ So I chalked it up to the low octance gas, went and put 93 in it.....still does it.
~ OK I though maybe my tuning was wrong, so I upped the fuel on my Zdyne. The more fuel I gave it the worse it got.
~ Next it got some STP fuel system cleaner, maybe there was some water in the fuel....didn't help
~ Next was 1/2 tank of 100 octane race gas.....still didn't help. So it's not the gas apprearently
~ Perhaps the fuel filter is clogged, replaced it....still didn't help
~ Reset the ECU...no good

Whats that leave? injectors or the fuel pump. Why? it runs perfectly fine at idle/off boost at any RPM from what I can tell where the flow/duty cycle isn't that high. I could have messed up the injectors by running them 100% or burnt up the fuel pump by running it that out of gas.

Any thoughts?

Your H-T dumbass
Steven

 

Damn man. Sounds like you need to step back and get a new perspective.

I ran a boosted zc with the Zdyne so I hear you. What guages to you have?

All you really need is EGT, boost and air/fuel. A neat trick to see how your timing and fuel maps are is to turn off the open loop function on your computer. This will allow the motor to run solely from your maps you've made. Watch your guages while you do this and see what they say.

It sounds like you're getting too much fuel on boost and the computer is fighting you while trying to pull it back. this will lead to mad rich readings as soon as you accelerate.

It's a mess but I need more info from your gauges. your plugs are fouled with fuel. That is a good sign of too much gas.

Good luck

 

Ahh, yeah. I run only on the maps. My open loop is set to 1%(off). A/F guage reads what it should/normally did untill the said problem occurs. Seems to be running a bit warmer that normal too.

 

Sorta sounds like your fuel pump is failing under a load. Don't really know how you could test it tho. But here is the way you test one:

Pressure should run from 35 - 41 psi. With the vacuum line disconnected from fuel pressure regulator.

Pump should output 233cc (7.8 oz) in 10 seconds @ 12v.

Testing:

With the innition switch OFF, disconnect the connector from the Main Relay. Connect the BLK/YEL wire and YEL/BLK with a jumper wire.
Becarful when relieving fuel pressure in the line. Use a rag to cover, however you do it, to avoid getting sprayed.
Disconnect the fuel return hose from the fuel pressure regulator, in order to place the hose in a container for measurment.
Turn the ignition switch ON for 10 seconds, and measure the flow.

If fuel flow is less then 233cc (7.8 oz) in 10 seconds, or no fuel at all, check for:

Clogged fuel filter.
Clogged or pinched fuel line.
Pressure regualtor failure

 

Thats what I was thinking, that the fuel pump is crapping out underload. I've got in interga unit that i'm going to try and replace it with tonight(weather permitting). I've got a set of 680cc RX7 injectors that I'm gonna sqap inplace of my DSM 450's, but thats another variable in the equation.

 

**UPDATE**

DAMN, I hate the EF gas tank, you've got to drop the bitch to get to the pump...ugh I got my fuel pump out though.....i'm replacing it with a G3 'teg fuel pump that I had on hand. Aside for some minor wiring issues it'll drop right in. The thing is though, the HF fuel pump is twice the size of the 'teg pump. Wierd huh? I'm sure that the newer 'teg pump will out flow it......we'll see if this cures the problem tonight.

 

** UPDATE 3-25-02 **

Well the 94+ Integra LS fuel pump has been installed and works like a charm.....unfortunately that didn't solve the problem......Neither did replacing the distirbutor after I kept giving me a code 9(CYP sensor).....I"m at a loss right now. I romoved the injectors and checked them out, there're not clogged. However the O-rings were in odd shape, they were spongy and really easy to rip. Guess I'll replace those next.....My injectors should be here some time this week hopefully.....ugh. Only thing in the fuel system thats left is the injectors and the FPR.

Any thoughts?

 

^......I find people are to lazy to scroll to the bottom of the screen

 

I'm bumpin this one for ya.. unfortunately I'm clueless as to what the problem would be.

 

harrytg* Thanks dude, I think I figured out 1/2 the problem last night. The timiing belt had a bit of slack in it. I for got the final step(was doing it from memory), when I put the last time I had i off....you're supposed to line the TDC marks up thenturn then 3 more teeth counter-clockwise, loosen the adjuster bolt 180, then re-tighten it......No more spardic jerking around.

Like I said tho thats was 1/2 the problem. Now i've got to figure out why my rail pressure keeps spiking, dropping out....even at idle. If I press on the gas the pressure drops. Confusing. Guess that means i've got a FPR going bad or a leaking injector, right?

 

i would say yes....check your PUMP. Do you have a gauge on your fuel filter? If you do and when you hit the throttle it should go up...if not...then your pump....if yes then your FPR or injectors...