M42 Full Rebuild now won't start

[Dj Buttchug]

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

[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.

[theTBLACK]

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

[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]

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]

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

[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]

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]

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.

[fresh_TD]

OP, did you get this figured out?

[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

[theTBLACK]

OP, did you get this figured out?

Unfortunately not.

[theTBLACK]

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

Spark has been verified. We have tried starting using ether, but to no avail. Perhaps I should recheck the injectors and everything else.

No stumbles. No partial-fires. Just straight cranking.

And that could be the case. I'll have to double check, but last I checked the timing was 100%. Ahhhh.

So many potential things. Thanks for the feedback!

[nk1221]

Yeah I would try swapping injectors with some known working ones and go from there!

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[bmwman91]

Spark has been verified. We have tried starting using ether, but to no avail. Perhaps I should recheck the injectors and everything else.

No stumbles. No partial-fires. Just straight cranking.

And that could be the case. I'll have to double check, but last I checked the timing was 100%. Ahhhh.

So many potential things. Thanks for the feedback!

Spark verified...did you remove a plug, leave it connected and see the spark? I'd think that you'd get something, at least a misfire, if you spray ether into the intake while cranking if you had spark.

Could you have reversed the fuel feed lines? I think that if you connect them to the rail backwards you won't get any flow since the regulator doesn't really allow backwards flow.

Did you remove or disconnect the ECU at any point? Maybe it is not plugged in, or you forgot to install a chip? If you replaced the DME, it is entirely possible that there is no chip in it unless you opened it and checked.