Well as the title states my car won't start and I need some help. It is a 2004 Mustang GT. I just replaced the transmission and now it start. It cranks but won't fire. I've tried a different battery, replaced the injectors, coils and plugs. Tested the fuel pump and still nothing. But I did test the ignition too and I'm not getting any power to the coils themselves. Any help as to what would cause no power to the ignition system?

 

Did you remember to reconnect the crank & cam sensors?

 

Yeah got those. Was thinking that after I posted and even checked them to make sure they work with my multimeter.

 

Still nothing. Any help?

 

How corroded are your battery connections?

 

Check ignition fuse.

 

Ok I checked and fuses are all good. Battery terminals have some corrosion on them. Going to clean them up real good and see what happens.

 

Lights come on w/ key inserted and "bing-bing" sound? I would say get a battery w/ some serious cold cranking amps but you already got a new battery. Hmmm, check the electric wire harness. Might be an exposed wire grounding out that's just been rubbed Raw. Go thur ALL your fuses! Pull 'em out one at a time, if not blown, reset firmly back in place. One non-significant fuse could be the culprit.
Get that alternator checked out too. Use baking-soda w/ water and/or coca-cola to clean the battery terminal area. It'll get them squeaky clean!

 

Alternator wouldn't cause a no "spark situation". I would need to be able to get into the Pcm to diagnose this.

 

Hey thanks everyone for the input and suggestions of where and what to check. Cause it made me look back over everything and I had forgot to plug the crank position sensor back in. Stupid mistake but again thankyou everyone.

 

That will bite you in the butt everytime

 

Yeah it's the little things that drive you crazy. Like now it has a miss like its misfiring as you just cruise. But if you accelerate it doesn't do it. I have changed the plugs, COP's, fuel injectors and it still acts like it has a misfire. The computer is not calling any codes and I've noticed that when the car is first started and cold it doesn't do it. It only stumbles after the motor has warmed up. I even tried turning the EGR off to see if it might be stuck but still the same. Any thoughts anyone??

 

That sounds just like a vacuum leak.

 

Well how bout that! From a carb/dist/timing light 'old schooler' no less!

Shows the last 4 years on TMS hasn't been completely wasted.

 

Nah the vacuum lines all look good and are hooked up. So that's not it.

 

Did you take the exhaust down to do the big swap? Maybe something fell into the cat

 

Yeah and double checked before I put the car back on the ground. But it wouldn't be the cat cause I removed all four of them shortly after I bought the car 6 years ago. I think it may be compression loss between cylinders. I have a bit of lope and pop sound from the passenger tail pipe but not the driver side. So think I might not have got the passenger side head seated and sealed good enough after I replaced a valve I'd snapped setting the timing.

 

Fuel filter, or pump might be getting weak and breaks down after the pump gets hot

 

Ok I'll try that. It's time to refresh the fuel system anyway.

 

My 94 was bad about that