No spark, code 34

Discuss topics related to the CA18DE and CA18DET series engines.
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proffesional2
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I just finished my swap and when I went to start it and it wouldnt start. The first thing I did was check for spark, there wasnt any. Checked all my connections and everything was good so I checked for trouble codes and I got 34. I figured it was just bad wiring or something so I wired it straight to the ecu and still got the same thing. Can a knock sensor stop spark, and where can I get one?


MikeDombeck
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Car: 1995 Nissan 240sx SE S15 SR20DET

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im flashing 34, but my car still starts up..... i dont know man..... but i dont think the knock sensor would do that

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float_6969
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The car will still run w/o a knock sensor. Try a different ignitor.

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proffesional2
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I tried a different ignitor and nothing so I checked to see if there was any voltage goin to the ignitor and there was nothing. I'm thinkin the ecu gives the ignitor some voltage so I was going to try another ecu but before I jump off of that bridge what tells the ecu to give the ignitor voltage? If I'm gettin this wrong tell me I really want this runnin and I'll take any advice I can get.

boost_boy
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proffesional2 wrote:I just finished my swap and when I went to start it and it wouldnt start. The first thing I did was check for spark, there wasnt any. Checked all my connections and everything was good so I checked for trouble codes and I got 34. I figured it was just bad wiring or something so I wired it straight to the ecu and still got the same thing. Can a knock sensor stop spark, and where can I get one?
Go back and triple check your wiring because if you got it all hooked-up correctly, it would crank right up. And because you got a code 34 tells me you left something undone to include the knock sensor wire. Take your time and check your stuff. Most of the time it's just a ground or the orange wire on the dash harness is not hooked-up, or even a crappy job over by the battery.

Dee

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proffesional2
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ECU now reads 55 starts but wont idle, having some sort of fuel delivery problem, feed line won't depressurize at all when pump is not connected. So close yet so far .Slowly losing patience .

boost_boy
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proffesional2 wrote:ECU now reads 55 starts but wont idle, having some sort of fuel delivery problem, feed line won't depressurize at all when pump is not connected. So close yet so far .Slowly losing patience .
zeromodify?cmd=editpost&id=1582529

Do you have all of the vacuum lines, grounds, AFM, and injector harness connectors hooked-up to the correct injector? Please read the above! If you lose patience with your car, then you've failed and wasted your money and time as well.

Dee

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proffesional2
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I got all the grounds and vacuums connected but I can only work with it on the weekends so I gotta wait to check em over again. I thought the injectors were spose to throw a code if they weren't wired right.The link says the thread is locked and cant be edited

boost_boy
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proffesional2 wrote:I got all the grounds and vacuums connected but I can only work with it on the weekends so I gotta wait to check em over again. I thought the injectors were spose to throw a code if they weren't wired right. The link says the thread is locked and cant be edited
That link is stickied and only mods and administrators can add to or modify it. It is there for reference and not for discussion. The injectors only throw a code if they leak and that's a rarety in itself. Do you hear your fuel pump priming when you turn your key to ignition on? If not, then your wiring is botchy and you will need to re-wire or find someone that can do it for you. If does come on, the you are on the right track and possibly have some other issues such as, a blown ecu, bad ignitor, etc, etc. Each situation is different because it's your car and not ours and since we didn't wire it, it's extremely hard for us to pin-point your issues. We can only give you our interpretation of what might be the problem. If all fails and you think your wiring is bad, ask a member for help or pay someone to wire it for you. If your ecu is bad, get another one. You're not the 1st to have this problem and won't be the last, so I am doing my part to point you in the right direction and my advice didn't help, maybe someone else's can.

Dee

blacked out
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Professional is tryin to say that nothing is wrong with the fuel pump. Its pumping fuel like crazy. The car will run off starting fluid, and the problem is that it seems like it's not getting fuel to the cylinders. The fuel line to the fpr will not depressureize no matter what unless we take the hose off of the filter, fuel is comin' all the way to the fpr but goin nowhere. Could the fpr be faulty?Clogged?

And the ecu is not throwing any codes.

And we can't even look at the thread ---zeromodify?cmd=editpost&id=1582529

boost_boy
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blacked out wrote:Professional is tryin to say that nothing is wrong with the fuel pump. Its pumping fuel like crazy. The car will run off starting fluid, and the problem is that it seems like it's not getting fuel to the cylinders. The fuel line to the fpr will not depressureize no matter what unless we take the hose off of the filter, fuel is comin' all the way to the fpr but goin nowhere. Could the fpr be faulty?Clogged?

And the ecu is not throwing any codes.

And we can't even look at the thread ---zeromodify?cmd=editpost&id=1582529
Do you guys have an injector resistor installed? If you still have no spark, at least look into the cylinders and see if gas is being sprayed by the injectors. If so, and you still have no spark, you should start looking at your ignitor.

Dee

blacked out
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boost_boy wrote: Do you guys have an injector resistor installed? If you still have no spark, at least look into the cylinders and see if gas is being sprayed by the injectors. If so, and you still have no spark, you should start looking at your ignitor.

Dee
Resistor set up how? We have spark it RUNS off of starting fluid the prob is that gas is goin to fpr and thats it.

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c-rad
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blacked out wrote:Professional is tryin to say that nothing is wrong with the fuel pump. Its pumping fuel like crazy. The car will run off starting fluid, and the problem is that it seems like it's not getting fuel to the cylinders. The fuel line to the fpr will not depressureize no matter what unless we take the hose off of the filter, fuel is comin' all the way to the fpr but goin nowhere. Could the fpr be faulty?Clogged?

And the ecu is not throwing any codes.

And we can't even look at the thread ---zeromodify?cmd=editpost&id=1582529
Did you mix up the feed and return lines?????????????

fraz
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what he said!!

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c-rad
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fraz wrote:what he said!!
I know he messed that up. The key word in his sentence was "the fuel line to the FPR".

The RETURN line comes off the FPR and the feed line goes into the rail!

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proffesional2
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thanks for the replies/help. some of you sound mad but you helped any way and I appreciate it. it was the feed and return lines, a friend of mine hooked them up but since I didnt check them I'm equally responsible. thanks.


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