Spark but no timing?

[TYTILIDIE]

I have a serious issue here. I am trying to start Ty up. Lots of things have been done to this truck, bigger turbo, 75#injectors, MSD ignition, MSD wires. One thing I can say is that this truck ran when it was taken apart. I never touched the distributor except to change the cap and rotor. I have fuel, I have spark, all cylinders have compression, but this thing will not start. Any thoughts?

If an ignition module was bad could it still put out spark?

 

[Ty 1885]

Re: Spark but no timing?

Do you have spark on each wire ?
Are the injectors firring ? all of them ? If yes to all, then i would say you may have timming issues.

 

[Don W.]

Re: Spark but no timing?

I have a serious issue here. I am trying to start Ty up. Lots of things have been done to this truck, bigger turbo, 75#injectors, MSD ignition, MSD wires. One thing I can say is that this truck ran when it was taken apart. I never touched the distributor except to change the cap and rotor. I have fuel, I have spark, all cylinders have compression, but this thing will not start. Any thoughts?

If an ignition module was bad could it still put out spark?

Mike, I seem to have seen posts where the module was bad and would trigger the coil but not the ecm so no fuel was being delivered. Don't know how true that is. Squirt some gas in the TB and see what happens. Crank some then pull a couple of plugs and see if they are wet. Knowing you, you've already double checked everything; timing, firing order, fuel pressure, connections. Air/Fuel + compression + spark(at the correct time) = run It's one (or more) of those things.

:rotf: After being apart all winter mine wouldn't start either. Fired right up after I found the rotor on the bench and put it back where it belonged. :rotf:

 

[TYTILIDIE]

Re: Spark but no timing?

Mike, I seem to have seen posts where the module was bad and would trigger the coil but not the ecm so no fuel was being delivered. Don't know how true that is. Squirt some gas in the TB and see what happens. Crank some then pull a couple of plugs and see if they are wet. Knowing you, you've already double checked everything; timing, firing order, fuel pressure, connections. Air/Fuel + compression + spark(at the correct time) = run It's one (or more) of those things.

:rotf: After being apart all winter mine wouldn't start either. Fired right up after I found the rotor on the bench and put it back where it belonged. :rotf:

Yes I have double and triple checked things like this. Timing no because like I said, the truck ran before taken apart. The injectors are definitely firing. I have pulled every plug at least 6 times to ensure I don't load the cylinders up with fuel. I pulled the cap off and doubled checked the rotor. Next step I guess is to do a TDC and make sure the dist is correct. It doesn't even sound like it want to start, although the other day when I went to crank on it nad the battery was near dead I did get a nice backfire.

 

[Bill Z]

Re: Spark but no timing?

If you have not figured it out yet, try taking the MSD ignition out just to see what happens. By the way, recheck the placement of the wires. Remember that the distributor goes clock wise 165432. The number 1 cylinder is the front one on the drivers side.

I’m not trying to say you don’t know anything, just that sometimes we all overlook things we have known most of our lives.

Good luck.

 

[TYTILIDIE]

Re: Spark but no timing?

I am having trouble with TDC, I cant get my piston stop in there because of the lousy headers. I have the timing mark on the balancer lined up though and the rotor is off a little, about between the #1 and #2 post. I guess I am going to have to look further in to the dist. I truly don't remember taking that thing out but I suppose it is possible I forgot.

 

[Don W.]

Re: Spark but no timing?

You can also use cyl # 4. Just don't forget when you set the dist.