93 240sx with sr20det cant get it to start

[silviasliderNJ]

I just did the swap in my 93 240sx, cant get the engine to start. The motor gets fuel an gets spark, timeing is dead on...

Info on car

blacktop s13 sr20detstock t25tubular exhaust manifoldaftermarket o23in down pipetest pipeblitz intercoolerz32 maf stock injectorssard fuel pressure regulator

[srpowered240sx]

is it just turning over and over without starting? thats odd, you have fuel, spark, and compression; should have fire. doesnt the z32 maf need a piggy back computer to make it work with the s13? correct me if im wrong.

[Hijacker]

The Z MAF needs some sort of aftermarket engine management to work properly. Teh stock ECU can't understand it.

What happens as you try to crank it? It just cranks but doesn't catch? Does it try to catch? Do you hear backfiring or any kind of stutter?

The more info you can give us, the better we can help you.

[silviasliderNJ]

i have a redline ecu ( i think that might be a problem) tuned for z32 maf

i just try to start it again, crank crank an it turned over an kinda chugged/shuttered but didnt turn over completly it backfired a lilttle

[Hijacker]

It's possible that the timing is off 180 degrees. If you can, pull the cas out, rotate it over 180 degrees. I find making small marks helps in this so you know how far to rotate it. Reinsert and see if the car runs.

I had this happen on my car years ago because the wiring for the ignitor was done up wrong, so the firing order was backwards. When it was off 180 degrees, I would get backfiring pops through the intake.

[silviasliderNJ]

When it was off 180 degrees, I would get backfiring pops through the intake.

thats exactly what it did

now with rotating the CAS, should I unbolt in an spin the CAS 180 degress an have it up side down? or rotate the gear at the end of the CAS?

[blinker_fluid]

are your fuel lines mixed up?

[silviasliderNJ]

not that i know off.

from the fuel filter to the fuel rail then at the end of the rail to the FPR back to the return line

[Hijacker]

PUll it out completely and then make an up mark on any part that rotates. Then rotate the gear over until your mark is down. Then reinsert

[silviasliderNJ]

i had a spar cas laying around, i just wanna double check what ur say

im pointing to the end of the gear on the cas thats what u want me to turn 180 degress?

Also I wanna double check the tdc? what the best way to check this?

[goalguy02]

The way I turned mine 180* is to rotate motor and set at TDC on intake side (second mark from left) pull the CAS then rotate the motor one complete revolution and reinsert the CAS. Fixed my problem.

[Hijacker]

I did that, goal (set it to TDC exhaust), but I couldn't get the CAS to 15 BTDC. We could get it to about 20 BTDC, so we moved the CAS gear over one tooth on the cam gear, and then we could only get it to 10 BTDC. It was as if 15 was impossible to reach that way.

But yes, you spin the gear. TDC compression stroke should have the timing marks pointing like:

TDC is marked on the crank pulley as the second mark from the right.

[silviasliderNJ]

bottom crank pulley second mark ( should be at TDC) Correct ?

[Hijacker]

yes

[silviasliderNJ]

I think the timing as far as cam chain on the cam gears is dead on

[silviasliderNJ]

ok i turned the little gear on the CAS 180 degress ruffly...

now I am going to put the valve cover back on an see if starts...

[silviasliderNJ]

now it sounds like it wants to start but wont start

[duffman1278]

Make sure you havn't flooded the engine since you've been trying to start it and its still not starting, that could be holding you back. Also, try moving the CAS case back and foreward a bit to see if it makes a difference on trying to start.

[WONit]

From the pics it does look like the timing is dead on,but your gold mark is up top when it should be on the mark on the crank . There should be 2 grey links 1 on each of the cams like posted in the pics HiJacker posted. I tried to do my timing by eye and ended up pulling the upper oil pan to remove the front cover and set the timing that way. I think you should do the same. just my thought on it.

[duffman1278]

OO yea ^^^ He's right, the gold link needs to be on the bottom, I think you mistook the dark grey links for the gold. Sometimes the chains don't have the black/dark grey links so the best thing to do, even though its tidious, is to count each indivual link until you get to the right amount where the black links should be. Check the FSM, it should be within the range of 43 I believe from the gold link to the black one at position 10 o clock I believe, count clockwise too, not counter.

[Hijacker]

The motor's been turned over a couple times, so the links won't match up now. They only match up like once every 30-40 revolutions.

[silviasliderNJ]

yeah I know about the cam chain now lol...I took the spark plugs out two of them were fould an the other two were wet (from fuel)

this is after i rotated the CAS 180 degrees... I tryed to adjust the CAS a little bit on the head an got it to the point were it almost wants to start but still wount...


Modified by silviasliderNJ at 8:11 AM 4/3/2008

[silviasliderNJ]

still cant get it to start

[silviasliderNJ]

still cant get it to start

[duffman1278]

Run a compression test.

[silviasliderNJ]

yes already did

[duffman1278]

What were your numbers?

[silviasliderNJ]

i dont remember ( i did it like two weeks ago)

what i really need is a picture of someones CAS at TDC were it lines with the cams

[ryan15]

bottom crank pulley second mark ( should be at TDC) Correct ?

I know this is OT, but you should replace the crank pulley, it acts a harmonic damper and when its damaged like that it could very possibly cause premature bearing wear/failure.

Ryan

[silviasliderNJ]

have a new pulley already just havent put it on