s40 sx engine swap touble shooting

[rebel69]

i have a nissan 240 sx and did an engine swap, took out a ka stock motor and put a redtop sr 20 det motor and now im having problems getting it to start.it was running, waiting for a maf sensor plugged it in and now it wont get spark or fuel. has anyone had this problem or does anyone know what to do from here? thanks in advance

[redtop91]

If you don't get spark or fuel start troubleshooting the spark and fuel. Make sure the spark plugs aren't fouled, the fuel pump is priming (if you have one). Also clarify your original post. I get the idea but others, who might have valuable info, might not. Additionally, for better info and to reach people who can help try posting in the RWD engine specific forum here: zeroforum/138

[Bwana]

Movin' this over to the SR forum for ya.

BTW, Welcome to NICO!

[DRFT240sx06]

hey i'm having this exact same problem, no fuel and no spark, my fuel pump works so i kno its not that, i checked my main ignition wiring on my so i'm stumped on this

[redtop91]

Sounds like a bad ECU.....

[DRFT240sx06]

that's wut i thought, i had another post on here, and someone said to test the ecu codes, i kno i need to turn the screw on the ecu but which way? and how far? im new at this

[redtop91]

Counterclockwise one turn, Clockwise one turn. The key has to be in the "on position" If you go too far in either direction you'll clear the codes but I believe codes are only thrown while the engine is firing.

[DRFT240sx06]

would you suggest gettin a new ecu then? because i'm getting fuel to the fuel rail but its not going throught the injectors and i tested the coil packs with a multimeter and they seem good, but i'm not getting any power to them, i double checked my wiring so i dont kno what else to think except a bad ecu

[DRFT240sx06]

ok so i tested my ecu and i got code 55-other malfuction. consult terminal required... what's that mean?

[redtop91]

ECU code 55 on an SR is all clear... What all is done to the fuel and ignition systems?

[DRFT240sx06]

walboro fuel pump, really that's the only thing to the fuel system, stock fuel injectors, new spark plugs, there's really nothing else, everything is stock

[redtop91]

The only thing that prevents fuel from reaching the cylinder is not having fuel pressure (Faulty pump and/or wiring), fuel not being injected (Leaky injector and/or wiring). Problems with spark are a wiring harness issue, bad coilpack and/or harness, fouled, not gapped, or broken plugs, or an ECU not sending a signal to any of the above to perform their duties.

[DRFT240sx06]

well on my fuel injectors the clips on all four of the plugs i think are broken, and if those are broken it the injectors might not be getting a signal right? would that be causing that problem? and also for the spark is there a chance that the coil pack is fried or something like that? and for the ecu i went and got a different one today so i don't think my problems there

[redtop91]

I had a problem with the entire coilpack wiring harness recently when I was running on 3 cylinders. I've never heard of a coilpack being the culprit but they are cheap and always a possibility. And the injectors, you should check the resistance across them, but yes, that is a possible problem with the clips.

[DRFT240sx06]

do you know where i could get new clips? the ones on the ka harness dont match up, as for check the resistance i'll have my friend come over with his multimeter and i'll post what comes up

[redtop91]

Nah I really don't know where to get new clips, you might have to buy a new injector harness and mate the two...

[DRFT240sx06]

its alright optionimports has an injector kit with new clips and everything so i might get that, but one thing that popped into my head was that maybe my crank angle sensor is broken, if it is broken then i wouldn't be getting any spark right? but would that also mean no fuel?
Modified by DRFT240sx06 at 8:08 PM 8/14/2007

[doridori23]

With absol

Sounds like a bad ECU.....

utely no troubleshooting you are telling people to buy a new ECU? WTFGKY Quit padding that post count. I know your only trying to help the person but telling them to spend $400 with out even troubleshooting anythign and later on throwing out false information in later posts is not something ther person wants or needs.

As above Cam Angle Sensor does control both fuel and spark. Unless you cracked open your valve cover or moved the CAS then i would leave it alone physically and check the wiring. Do a search of the archives

DRFT240sx06 the clips being missing on your injectors will not cause an issue with them as long as you unplug them and inspect for corrosion. If you see vertigreen then you need to get some QD Electrical Contact Cleaner and clean them up with the QD and a soft bristle brush (brass is the stiffest i would use) This cleaning method applies to all terminals.

IF your car in a fresh swap and has never started then there are a few things to read. http://www.heavythrottle.com Go to the Install FAQhttp://www.frsport.com/index.p...id=20

After you read them and get familiar with what your wiring should look like and what goes where. Come back and repost any questions you have. I am not pushing you away but from your other topic going it sounds like shes not wired up yet.

[redtop91]

With absolutely no troubleshooting you are telling people to buy a new ECU? WTFGKY Quit padding that post count.

Hahahaha what the hell are you talking about? Where exactly did you hear me say go buy an ECU? And additionally what SR ECU costs $400? Kids these days.

*sighs* no drama in this thread. Rather, be constructive.

[DRFT240sx06]

ive read both heavythrottle and frsport, i'm familiar with both, i've read up on it, i have a dvd for wiring up the harness properly(dvd is from wiring specialties) so i know there is nothing wrong with my wiring, but this is a fresh swap and the CAS was not in the motor to begin with, so that's why im asking about that

[spikNspan]

I know you just said your wiring is good, but I'm almost positive that there is some minor thing wrong with the wiring that is causing this problem. If you have a DVOM then I'd suggest doing some voltage testing with the fuel pump and ignition wiring. If you can 100% rule these out then I would definitely check the ECU as suggested before. Good luck man.

[rebel69]

Fixed the last problem and i had to get a new ecubut now it doesnt seem like the 2nd cylinder isnt firing up