98 Sentra SE w/bluebird DET

Checked the spark/compression (3 at 130 - 1 at120psi), fuel is good, running on Simple Digitial Systems Engine management (checked values), checked started. Emptied out current gas and put in new gas (maybe tainted gas?) don't know what else could be wrong. Just changed the oil. drove fine the night before and the next morning it wasn't starting. The engine cranks, sounds like it wants to start. any ideas would be appreciated. thanks.

wallace

gas in oil could be caused by a faulty pcv valve. theyre like 8 dollars from napa or advance

Wow..this is interesting. I wonder how often this happens. Anyways..what seems to be the issue is the crank pulley. The crank pulley apparently is made of two pieces..thie inner pulley and the outter pulley and they are possible pressed together? Anywho, the pulleys somehow managed to slip so that the timing marks are not lined up with the crank notch..From what I hear this is an issue with Honda Preludes. If anyone would like picture I can take a couple. But the reason for not starting is that the Simple Digital Systems engine management reads the crank position via magnets on the crank pulley and a pick-up sensor. So due to the pulleys slipping causeing the magnets to be at wrong angles threw off the whole timing. Anyways, we're in the process of ordering new magnets since we have a spare crank pulley already. I guess the old one is garbage since we can't get them aligned again and even if we did it could possible slip again. I guess shiet happens.

Gas in the oil is a sign of a leaky injector. What happened is after you drove the car, the injector(s) are leaking off into the cylinder(s). So once you go out the next day to start the car, it's going to flood itself out because there is standing gas in the cylinder(s). TAke out the spark plugs before you try to start the car any more, look down into each cylinder with a light and see if you can see any gas sitting on top of the pistons. If so, I have a remedy to get the gas out. YOu can also take off the fuel rail from the intake manifold, leave gas lines connected, turn the key on to pressurize the system, BUT DON'T TRY TO START. Then turn key back off and see if you can see any fuel leaking from any injector. If you have gas in a cylinder or a injector is leaking, you need to replace the o rings. On replacing them, make sure you put some vaseline, oil, grease, etc... so that they pop into place without damaging the o rings. Those compression numbers seem low as well.

Wow..this is interesting. I wonder how often this happens. Anyways..what seems to be the issue is the crank pulley. The crank pulley apparently is made of two pieces..thie inner pulley and the outter pulley and they are possible pressed together? Anywho, the pulleys somehow managed to slip so that the timing marks are not lined up with the crank notch..From what I hear this is an issue with Honda Preludes. If anyone would like picture I can take a couple. But the reason for not starting is that the Simple Digital Systems engine management reads the crank position via magnets on the crank pulley and a pick-up sensor. So due to the pulleys slipping causeing the magnets to be at wrong angles threw off the whole timing. Anyways, we're in the process of ordering new magnets since we have a spare crank pulley already. I guess the old one is garbage since we can't get them aligned again and even if we did it could possible slip again. I guess shiet happens.

Last time I did an engine swap the crank was one peice...

i think the reason for gas in the oil is because since the timing was off..the gas was just leaking down the piston walls as we were cranking the car due to the gas not burning or anything since the timing was so off..and i'll take pics of the crank pulley..it may look like one piece..but it's definetly an inner and outter pulley that has been assembled together..

i think the reason for gas in the oil is because since the timing was off..the gas was just leaking down the piston walls as we were cranking the car due to the gas not burning or anything since the timing was so off..and i'll take pics of the crank pulley..it may look like one piece..but it's definetly an inner and outter pulley that has been assembled together..
Damn that is crazy, never knew that.

i think the reason for gas in the oil is because since the timing was off..the gas was just leaking down the piston walls as we were cranking the car due to the gas not burning or anything since the timing was so off..and i'll take pics of the crank pulley..it may look like one piece..but it's definetly an inner and outter pulley that has been assembled together..

There is no way the gas can get into the oil if the timing is off. If the outer side of the pully seperates from the inside of the pully the car is still on timing. The pully is just a reference point to the crank as long as all the timing marks are lined up on the chain and you had the car set at 15 degrees via the distributer the crank pully can turn all it wants the only thing is you will not be able to use the puuly to get your timming but the timing has not changed just the reference mark.

The only thing that will happen is that your car might not charge properly or the AC might not work properly as the pully slips the Alt and AC will not rotate fast enough.

If you have gas in your oil it is die to a leaky inj or inj seal.

That's a good point, the gas shouldn't get into the oil if the timing is off on a factory ECU or reprogrammed ECU. Although I am running a Simple Digital Systems engine management where the timing (spark) depends on the crank position via magnets on the crank pulley and a fixed pick-up sensor. So if the pulley with the magnets are get thrown off 35 degrees..the timing (spark) will come at a different time causing the engine not to start and leaving excess gas in the combustion chamber..which will eventually leak down to the oil pan..

i'm not sure if i can really explain it correctly..i think this is what's happening and all caused by the slipping of the crank pulley where the magnets are mounted to..but can't gas get into the oil if the engine is flooded and you still try to start the motor?
This is the first time it's happened so i don't actually fully understand what is happening combustion/timing/funtionality wise..so please inform me..thanks

I'll try and get some pictures of the old pulley(slipped) with the magnets in it.