240sx fuel leak

[240sxninja!]

ok, ive had my 90' 240 for a couple years now and all its done is sit and im to the point where i think i might sell it. i bought it with a ka-e in it but as with 200k miles it ended up with a rod being thrown. so a buddy who has done a similar swap put in a ka-de. well since we put it in it smoked horribly at times. i dont remember how it got to be sitting but thats what it does. there was a ton of fuel in the oil and exhaust smoke so ive ended up replacing these parts and as a thanks it decided it didnt need its airbox so it literally made the airbox explode. and now it wont even start, but when cranking it still manages to pour out fuel... but here are the parts ive replaced:

-new injectors-new injector o-rings-new plugs-new plug wires-new cap&rotor-new ignition module-new ignition coil-new oxygen sensor-new oil (now soaked in gas again)-new oil filter (now soaked in gas again)

thats all i can think of at the moment but if anyone has a good idea please tell me. and compression is good, its getting fuel and i think its getting air (not sure) and its getting spark.

[mss5413]

If you know that you are still leaking fuel into the crankcase somehow even after an oil change, I would look into that more in depth. It is good that you have serviced your ignition system, but I don't think that it is the bulk of your problem right now. Do you have a gauge to check your fuel pressure?

Is your check engine light on?

Is your compression up to spec? The piston rings could be leaking fuel into the crankcase.

Did you pull your spark plugs and check them for anything not normal(carbon, melted electrode, corrosion)

[mss5413]

Sorry, I overlooked the bottom part of your post about the compression and fuel and spark. If I get any ideas I will keep posting. Most obvious, the repair manual should have something to help you. The free (Mitchell)service manuals are usually at the library so you can make copies of any pages you need.

[mss5413]

This may sound stupid, but make sure that your fuel hoses are going to the proper lines. The hose of the top of the fuel filter should be going to the bottom fuel line because there are two fuel lines going to the fuel rail. The top line is the low pressure return line and it curves to the left. Sorry, I can't see the engine so it is difficult.

[240sxninja!]

i just checked and the fuel lines are hooked up correctly. if you think of anything please tell me, if no one can figure this out then im going to sell it with all the crap in it and the old sohc motor. i just thought of it and i have some pictures of the new motor on my page i think this is it.... http://www.antz.8k.com/photo2.html thanks.

[mss5413]

Is your compression going down by any chance after say about a minute when you read the gauge?

I'm assuming you would have done a diagnostic already if the check engine light was on.

Is your fuel system holding pressure with only the ignition on?

[mss5413]

I saw the picture and sorry but that really doesn't help me at all. I will take a look at the service manual for the ka24de and see what it has about fuel in the oil.

[240sxninja!]

have you figured out anything yet? i tried cranking it and it started for a couple of seconds with a horrible idle then of course it died. and one of my girlfriends just wrecked her car pretty bad so i'd like to stay there a little longer with her than when it starts to get dark especially since i cant get pulled over on my bike... thanks for what help you have given me and i think that the compression stays at an even level even when the car isnt cranking.

[mss5413]

Have you checked your timing to make sure that it is 17-22 degrees BTDC. If you have a timing light hook up the spark plug cable to the #1 wire and off course the red and black timing light terminals to the battery. The white or red mark indicates TDC. The Service Manual has the timing marks and numbers. I will look at it because I forgot how the timing marks are numbered.

[240sxninja!]

yeah we did that a while ago and thats what was so weird... the timing light barely blinked at all but when we hooked it up to the civic to make sure it was working it was doing exactly what it should, which then led me to believe it was the ignition coil or module but now that it isnt that i have no clue....thanks

[Re037]

i have the same prob, still trying to figure it out.

[NISTECH]

there are limited possibilities of how your oil could get filled with fuel. 1 way to much fuel is getting put into the cyl's and 2 your rings are done allowing it to dump into the pan.

your compression was at what psi across the board? if its above minimum spec I think your ok.

So that leads to supply. You NEED to do a couple of tests to determine the problem or you are not going to figure it out or its gonna keep costing you money guessing. You need to perform a leak down test on the fuel system. See if you loose pressure after the 5 secs of pump on time when cycling the key from off to on. I suspect you will, you will then need to isolate where your loosing it. I know you just put injectors in it but you coulda tore seals [easily done]. Or your regulator is sucking it into the intake through its vaccum line due to a poor internal seal This is a good possibility since your air box exploded. pull the vaccum line off it and see if its wet inside.

post results of your checks.

[240sxninja!]

sorry its taken so long, ive been busy with some stuff around here. but the compression is at like 215? if i remember correctly... i dunno but its at stock levels. and i dont know which vacuum line you mean. sorry i cant be of more help.and i will probably try the leak down test soon.

[89 240 SOHC]

Make sure your fuel pressure regulator isn't messed up...

[240sxninja!]

i think im just going to sell it, im tired of messing with it and i found another that i want. if i ever figure out whats wrong with it ill let you guys know. thanks for the help