Here's a new theory.

I get good consistant spark in cylinders 1 & 4. Cylinders 3 & 6 ocasionally get a single spark at first crank. Cylinders 5 & 2 get no spark at all. All of those cylinders are fired on opossing rotations of the motor. Firing order is 1-2-3-4-5-6.

The new thought is that the crankshaft pulley REF sensor is not seeing the tabs on the crankshaft pulley properly. Their are three spots with tabs on the crank shaft pulley. One spot has two tabs close to each other, the other two spots have only a single tab. I figure that the spot with two tabs is the start of the firing order. Perhaps the REF sensor is only seeing the spot on the crank shaft pulley with two tabs and missing the others.

Mabye the crank shaft pulley was damaged in the wreck that totaled the car or perhaps wile being shipped and is bent so that the tabs bairly miss the REF sensors trigger? Mabye the single tabs on the crank shaft pulley are chipped or bent? I'm going to check them tonight with a feeler gauge and a run out gauge to verify that they are ok.

Sinewave has been helping me also, he contacted a friend of a friend who is a service tech at another nissan dealer in our area. He confirmed whant Daniel B pointed out, that if the camshafts are off by one tooth it will cause the CAM timing signal to be out of phase with the other timing sensors and cause their to be fire in only four of the six cylinders. I only have fire in two of the cylinders I think that this is the possible but not probable cause because the motor was running prior to the crash and I cant see how a crash would cause the timing chains to jump one tooth?

Any thoughts?

If I cant get it firing by Monday I'll take it to the dealer for a run on the Consult computer.

 

Just hit it with a hammer. haha

 

let me take some stabs at it. will your 98 coil packs fit this engine, if so try that, because you know they work. i have a feeling that one of your sensors is bad. try replacing all of your ones from the 98 to this engine. your chip is a 98 right? you mentioned that you smelled alot of gas before. are these injectors larger than stock? as we know the sensors send signals to the chip, so if your chip is 98, your sensors MAY have to be also. timing sensor? i would use all of the wires from the 98 engine on this engine. since you are using the 98 chip. the engines are identicle right. just the chips are different. maybe you will need to get high performance ignition that you could program. how will you check to see if the timing chain is on right? are the timing gears stock? or are they aftermarket adjustables? i did see some available some where from hks while reading awhile ago. ttyl. peace out.

 

if that doesn't work...








get a bigger hammer...


really, i hope you can figure it out..i will ask my dad.. he might have some insite...(my personal mechanic)

 

Matt my cousin read the thread and he had some advice for you ...

The only things that could possibly be faulty: Crank sensor, Crank sensor signal gear (on crankshaft), dirty crank shaft gear, broken crankshaft gear, timing could possibly be off as per Daniel B. Martin said, Check the ECU harness wires leading to the coils.

weak battery voltage will not distort coil firing, it will only slow it down because the engine is turning slower.
So you still have to check the timing marks on the chain and check the crankshaft gear. During shipping it is possible that the gear hit the floor breaking or chipping a tooth which will cause a problem like this. From what you have described it can't be anything else. Check those two and report back. If not i'll have to stress my brain a little more.

Ant's cousin ....

 

I have checked all timing related sensors, coils, grounds, powers, signal wires traced back to the ECU, swaped ECU's, checked the signal wheel teeth crank shaft pulley teeth, its all good? The only possible thing left to check is the cam timing marks compared to the crank shaft timing marks, thats a bit of work but I'll get it done this weekend for sure. If that aint it I'll send it to the dealer for some talking to by the Cousult computer.

My deepest thanks to all those who have offered help, I realy appreciate it. And thanks to those who offerd words of support, they are needed at times like this.

I really want to thank Sinewave. Keith has been helping me every step of the way. He came by tonight and did some trouble shooting whith me. I couldnt have gotten this far with out his help.

Now back to work for me!

 

Could the fact that your 98 computer has OBD2 have some kind of conflict with all of your sensors because they work with the 96 computer?

 

The 96 is OBD2 too.

 

I thought the 95/96s had something different with their computer... not as many restrictions or something, thats why those years were a tad bit quicker, maybe it wasn't OBD2 but something else.

 

Matt, sorry to hear about you still having some problems. What happen to the guy that was suppose to come down here to help you out? I wish I could help. Best of luck.

 

When you doing the SC install? I here keith is doing your valve body next weekend.

It was me and Keith the whole time.

I'm getting close to the problem, I can feel it!

Or is that just the oil and dirt in my hair?

 

I won't be doing my supercharger install anytime soon. First, I have to get the vb install first, which Keith will help me with next week if the vb is still in schedule to get to me in time. Then, I have to wait for my 3.33 pulley to come in. Some guy told me that I can reuse the stock pulley belt with the 3.33 pulley. I'll have to wait and see.