M42 Full Rebuild now won't start

[bmwman91]

Did you somehow mix up the cam and crank position sensors? It's unlikely since the plugs should more or less face the right way, but you never know.

How did you confirm that you are in fact getting fuel into the cylinders? Raw gas smell in the exhaust? How about verifying spark?

Could you have mixed up the ignition coil plugs? At start-up things are in wasted spark mode with plugs 1 & 3 and 2 & 4 paired. If you mixed up the coil connections just right, you'd get no combustion. Do you get any stumbles or partial-fires, or nothing at all?

Is there any possibility that you got the crank 360 degrees off from the cams (cylinder 1 at TDC of the intake stroke rather than the power stroke)? You want things physically aligned as shown in the left-most part of the bottom diagram of the first post:

http://www.r3vlimited.com/board/showthread.php?t=374858

[fresh_TD]

OP, did you get this figured out?

[theTBLACK]

Not always. If you are one tooth off it'll still run but then again if you are more than that you run the risk of hitting valves and pistons.

Check the easy stuff first and then report back. Im sure it is something stupid.

When you key on engine off before you crank is the CEL illuminated?

I'll have to double check and report back. Stomp test was working properly and all clear.

[Dj Buttchug]

Not always. If you are one tooth off it'll still run but then again if you are more than that you run the risk of hitting valves and pistons.

Check the easy stuff first and then report back. Im sure it is something stupid.

When you key on engine off before you crank is the CEL illuminated?

[theTBLACK]

Nice. Really like St George. It should if you have spark. Are you 100% the time is correct?

Likewise. And i'll have to double check, but I was pretty certain it was 100% spot on. Not sure where else to look, unless it could be a wiring issue. Even if timing was slightly off, wouldn't it still at least run like shit?

[Dj Buttchug]

Nice. Really like St George. It should if you have spark. Are you 100% the time is correct?

[theTBLACK]

East County Sd. El Cajon area. Do simple checks first if you haven't already. Spark plug firing order and make sure the fuel lines are correctly plumbed. Its easy to flip them.

What part of Utah? Lived in Cedar City for about 3 years to get my degree

That's awesome. I'll be in North County. I've done the simple checks, but i'll double check fuel lines are correct. I've definitely made that mistake before. Even then, it doesn't start on ether. Should it?

And i'm in Utah County - Used to live in St. George.

[Dj Buttchug]

East County Sd. El Cajon area. Do simple checks first if you haven't already. Spark plug firing order and make sure the fuel lines are correctly plumbed. Its easy to flip them.

What part of Utah? Lived in Cedar City for about 3 years to get my degree

[theTBLACK]

Also DJ, where in SD? I'm moving there in August.

[theTBLACK]

OP Which out of these do you not have?
1 Fuel
2 Fire
3 Air
4 Compression
5 Time

1. Fuel is good. Pressure is good.
2. Spark plugs are firing. New plugs, new spark plug wires.
3. New AFM, what else do I look for?
4. Compression is good.
5. Time is spot on.

[Dj Buttchug]

OP Which out of these do you not have?
1 Fuel
2 Fire
3 Air
4 Compression
5 Time

[theTBLACK]

Damn haha! Is it throwing any codes during a stomp test?

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Codes run all clear!

[nk1221]

Damn haha! Is it throwing any codes during a stomp test?

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[theTBLACK]

Man thats weird! Could it be flooding itself out? Wouldn't hurt to also check for vacuum leaks.

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I don't think so :( I also replaced all hoses and vacuum lines haha.

[nk1221]

Man thats weird! Could it be flooding itself out? Wouldn't hurt to also check for vacuum leaks.

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