Asking for help with my 2000 Pro Air Nautique with GT40 motor... Crank but No start

[keoni5]

The rebuilt engine has been tested, new distributor, TFI, plugs, wires, fuel pump, pressure regulator (getting 40 psi), new relays, kill switch disabled. Have started to look for shorts possibly? I am located in northern California and would happily pay someone to come out and help me figure this out (within the area), I don't know what else it could be? ignition coil tested, getting fuel and spark but only coughs and will not run. Possibly computer? I really have no clue at this point, more or less begging for help. You would you have my eternal gratitude if you could possibly help.

[2001SAN]

here's a good thread on ccf for GT40 diagnosis.

http://www.correctcraftfan.com/forum...gt40-diagnosis

might be of some help.

good luck,

D.

[Mamigacz]

Did you check your initial timing? I'm not sure what the intial timing specification is for this type of fuel injection (maybe 0 degrees BTDC), but I know you have to disconnect the spark control wire while timing it. Ford calls it the SPOUT wire on TFI's. With the engine not starting, you will have to have someone crank the starter while you check the timing.

Another possibility is that the plug wires are in the wrong order.

[keoni5]

here's a good thread on ccf for GT40 diagnosis.

http://www.correctcraftfan.com/forum...gt40-diagnosis

might be of some help.

good luck,

D.

I have been over that thread thank you, could not find the solution.

[keoni5]

Initial timing is set correctly (not 180 degrees out either) checked multiple times, plug wires are also correct.

[crobi2]

Not necessarily recommending this, but have you resorted to a spray of ether into the intake to see if it will run on that for a few seconds?

[keoni5]

Not necessarily recommending this, but have you resorted to a spray of ether into the intake to see if it will run on that for a few seconds?

Have tried starting fluid and it did not work.

[crobi2]

You said you are getting spark. Was this at the coil or did you remove a spark plug and check that?

If it is indeed getting spark at the plugs and won't fire up on ether, could the timing chain be off a few degrees on install? You could try moving the distributor to extreme ends of the timing range to see if she'll fire up. Be careful though if the timing chain is incorrect, you could possibly cause some damage.

Other less likely possibilities might include lifters adjusted out of order or something like that.


P.S. I think someone has warned that on these ignitions, that spark plug better be grounded well if testing out of the block or damage might occur to the electronic ignition.

[keoni5]

You said you are getting spark. Was this at the coil or did you remove a spark plug and check that?

If it is indeed getting spark at the plugs and won't fire up on ether, could the timing chain be off a few degrees on install? You could try moving the distributor to extreme ends of the timing range to see if she'll fire up. Be careful though if the timing chain is incorrect, you could possibly cause some damage.

Other less likely possibilities might include lifters adjusted out of order or something like that.


P.S. I think someone has warned that on these ignitions, that spark plug better be grounded well if testing out of the block or damage might occur to the electronic ignition.

Checked at the plugs, also swapped out the coil for another one to test and it definitely is getting spark, tried to mess with the timing from the initial (that occurred to me as well) no go, If I wouldn't have seen the engine run I definitely would have expected it to be the rebuild.

[crobi2]

I'm sorry, of couse I missed where you said it was tested. Curious though, how did they test it, with a carburetor or something?

[crobi2]

How was the intake put on? Is fuel making it to the cylinders?

All the rest of this is less likely because even the ether did not fire:


I guess you might also want to check for injector pulses at the injectors. I think they make special lights for this, I don't know if you can use a test lamp.

Another possibility is clogged injectors but it makes no sense that ALL of them would be clogged.

I guess if you are not getting pulses at the injectors, you will have to consider the computer. I would first make sure to unplug it and check that all of the contacts are ok and none are bent/broken. Then replug it and see if that helps you.

[keoni5]

How was the intake put on? Is fuel making it to the cylinders?

All the rest of this is less likely because even the ether did not fire:


I guess you might also want to check for injector pulses at the injectors. I think they make special lights for this, I don't know if you can use a test lamp.

Another possibility is clogged injectors but it makes no sense that ALL of them would be clogged.

I guess if you are not getting pulses at the injectors, you will have to consider the computer. I would first make sure to unplug it and check that all of the contacts are ok and none are bent/broken. Then replug it and see if that helps you.

Checked the injector pulse with a kit I borrowed (with the lights) and all of them checked out which is why it is so perplexing. unplugged the ecu and it looks great no bent or corroded pins, took the housing off and inspected and everything looks good (no burned transistors etc)

[crobi2]

What is different between the testing settup (where you saw it run) and now? Was it on an engine stand? Did they use your ECU and intake/injectors, was anything else different from the way you have it set up now?

[keoni5]

What is different between the testing settup (where you saw it run) and now? Was it on an engine stand? Did they use your ECU and intake/injectors, was anything else different from the way you have it set up now?

Nothing is different that's the crazy thing, was all of the parts on it now.

[crobi2]

Probably didn't injest water - should have cleared out by now anyhow.

Oil shouldn't matter just for start up on ether at least.

Essentially no vacuum hoses on the thing to mess up.


I mean, if it won't even fire on ether, you're back to timing. And even then she ought to backfire, so it's not that. Someone didn't leave a rag in the intake did they?

I'm fresh out - good luck