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No start - Checked multiple things so far and still learning.

1.2K views 19 replies 8 participants last post by  amc49  
#1 ·
The engine is a 2.0L 16V DOHC.
parts recently replaced to include
clutch slave cylinder
clutch master cylinder
Alternator
main power cable from alternator, starter, battery
Lower control arms on both sides
front brakes


The engine ran fine prior to needing a slave cylinder replacement for the clutch. While ripping apart the engine bay for the transmission to be freed it was noticed the main system cable needed to be replaced as it was in very poor condition. The brakes and lower control arms were replaced due to age. The alternator was replaced due to age.

current condition is the car is put back together and is now in a no-start condition. Will start with starter fluid but dies.
key cylinder turned to the on position you can hear the fuel pump prime. The pressure reading from an inline gauge is 42 psi to 50 but settles to 42.
The starter engages and turns over successfully.
Spark plugs all have sparks. The Cylinders appear dry.
Fuel injectors show battery voltage on one pin and ground on the other. I do not have a scope I can't see the occilation. Going to attempt a stethoscope to hear the injector turning on and off

What device is prohibiting the fuel rail from opening? Is there a vacuum hose or something I missed? I had to clear a couple of dirt dobbers from a couple of my 1/8 lines but they appeared to be passing air after cleaning looking for a point in the right direction.
 
#19 ·
I had just replaced my slave cylinder in my 2012 focus mtx75 and ran into an issue of a no start. It was like it was trying to get gas but something was holding it no matter how far I pushed on the gas.
I remembered the a series of sensors on the master cylinder down on the clutch pedal. I observed how they worked and acted. When I push the pedal down and then back up the sensors work in unison to each other. Push down on the clutch pedal one opens and then the other closes, and then vise versa. I had my sensors working out of unison.
Give that a look. It just might help. It did for me.
 
#5 ·
Igual revision de cables, bujias, chispas, bobinas todo bien, entonces lo deje para que le cambien la bomba de la gasolina, me comento un mecanico que probablemente no este manteniendo la presion adecuada el riel de inyeccion, haber que sucede.
 
#9 ·
I didn't change the fuel pump due to the PSI being in a good range and the pump sounding likely to be priming the rail. From various videos I have been looking through I am finding 40-50 psi to be fair enough not to need a replacement just yet though a brand new pump should be 60- 70 psi on key turn.
 
#10 ·
This is my son's first car probably just trying to get all the gremlins out before I release him in his own sports car only he knows he is racing. :) I used this car for years with no issues commuting to work I know he will enjoy the fuel mileage from it.
 
#12 ·
Similar issue with my 2015 2.0L with the dual clutch automatic. If it sits overnight it will turn over for about ten seconds then finally fire (albeit very slow and it sputters a lot initially). I can hear the low pressure pump kick on when I turn the key, and it seems to help if I cycle the key three or four times before starting. But it also seems to be having issues on the highway, especially at speeds over 65 mph. The other day I was on the interstate running about 80 and it lost throttle response several times, as in pedal to the floor and it was barely keeping the car going. Also throws codes constantly for low fuel pressure on the low side. All this seems to make my transmission lose it's mind as well. It's a fresh rebuilt trans with new forks, actuators, throwout bearing, cluthes, and a remanufactured TCM. All with less than 1k miles on it. Trans does fine until that low pressure code pops, then it goes haywire. All that said, I used Forscan to track the high and low fuel pressures, the HPFP is doing exaclty what the PCM asks it to do, but the low pressure pump is at a constant 30 psi low vs. the PCM request. I say all that to say that in my opinion, while the LPFP might be working, something is wrong there and if it's like mine, seems to be the root of other issues.
 
#13 ·
So it turns out the crankshaft position sensor was not reconnected when the transmission was reinstalled. This explains a bit. Also, the connector was melted and the wires were not in the best of shape. We installed a new connector last night but found the cat was getting really hot and I am hoping it is not plugged up. Also, the front fans were not triggering even at 100 Celcius.
 
#20 ·
Yes, messing with clutch linkage means one should check the operation of the clutch switch that makes sure car will not start with clutch out.