Stealth 993

WOW, sounds like a nightmare.

I would go over most connections, unplug, replug, & make sure they are not bent up or pinched.
I know it sounds obvious, but is the MAF plugged in? Is the TPS set?

C4SJOHN

Travis, I feel for you on this issue. I was thinking could it be that the DME relay may have gone bad during the process. I know it sounds to simple.. But if everything is checking out to spec maybe it is sometime simple.....

Mike J

I thought he replaced the DME?

If you can get hold of a compression gauge and run a quick check on a piston, that might hint at something

Following two threads is hard, but I understand why you are doing this.

If we have spark and fuel, then why would it not fire?

1 - No compression for some reason - easy check
2 - Wrong timing - easy check with timing light on all cylinders, that woudl check the entire circuit
3 - Bad fuel - not sure how to check this but you said it does not fire with starting fluid which should work
4 - Open intake (ie. no vacuum) - sounds like its OK
5 - fouled plugs (unlikely all 12)

When you had the timing light, did you get a chance to check all pistons like I suggested?

This problem is certainly not obvious what is wrong... or is that too obvious? :-)

Cheers,

Mike

Mike J

He gets fuel and spark - not the DME. :-)

axl911

Couild it be the engine is simply flooded?

I also noticed toward the end of the video, there were some smoke or something coming out of the cat when the engine was cranking.

Mike J

Possible for sure. Solution would be to pull all the easy lower plugs and crank the heck out of it, or blow compressed air into the open plug holes...... :-)

TravisB

Yep, I tried replacing the relay and I've tried a jumper as well. Definitely not the DME relay!



Yeah, I wasn't sure about posting the second thread but..I'm getting desperate, lol!

Compression..well, like you said, easy check I guess. No reason for there not to be though!

Timing - well, we only tested the #1 cylinders. Oops..

Fuel - it's less than a month old, and also the point about the starter fluid.

Vacuum leak - pretty much ruled this one out. Something big enough to keep it from catching at all would be painfully obvious, something small wouldn't keep it from starting.



Plugs - well, I've removed the lower 6 several times, blowing them off every time they go back in. Once I left them out for several hours, turning the engine over occasionally to air it out, and I hit the bottoms of the cylinders with a heat gun. No change. They do come out with a black coating on them every time, they're trying to do something..

Yes, I think that might have been fuel you saw at the end of the video. The garage reeked of gas after that..

Mike J

Not an issue - the car does not even burp. Plugging that line is correct since he removed the ventilation fan mounted beside the engine.

Juha G

But are you 100% sure you have the correct plugs?

techman1

IIRC there is a dowel pin arrangement on the flywheel to ensure proper alignment, do you remember having to line that up when you put the new flywheel in?

Luftd993

What does the rev counter do when you are cranking it?
I had a similar problem on an Audi 5V. Good spark and fuel galore. The rev counter stopped working a couple of weeks earlier but the car ran fine. One morning it would not start and I wasted 2 days trying to sort it. No fault codes displayed on vag com. The rev counter needle would bounce up occasionally when cranking. I gave up on the POS and a mobile mechanic thought he would try a new crank sensor as I had checked everything else. Sorted.

Good luck.

MDamen

When you checked spark at the plugs did you use old spark plugs or new? Maybe try putting some of the old plugs back in and see what happens.

IXLR8

Although not impossible, I find it highly unlikely that a component failed unless a wire was cut during installation of the engine/transmission.

Do you have a ground wire between the engine/transmission and the frame of the vehicle?

TravisB

Yes, the Bosch part numbers are the same as the old plugs, which I believe is the recommended plug. FR5DTC I believe.



Yes, it was a snug fit, I had to tap the flywheel with a rubber mallet to get it seated.



Rev counter stays stationary, but will occasionally jump. Should ~30 RPM even show though? It didn't strike me as weird..another thing is last night when we were checking the timing, I had the crank sensor disconnected and had to scratch my head for a second as for why I wasn't getting spark now with the DME relay in...plug it in and we were back in business. Well, ignition wise at least!



Yep, I tried swapping in the old plugs a day or two ago. I've checked for spark with both old and new as well.



Yes, it's on the lower starter stud..

jscott82

Haven't read the whole thread so apologize in advance if this has already been suggested.

Was the crank sensor properly gaped when it was installed? Sounds like you are getting inconsistent/false position information.