Hello All.

I have a problem.

Car was running fine on new enginre build in different car.

all of a sudden loss of power and wouldnt start.

30 mins later after basically nothing it started on the button.

2 hours later decided to go for a drive . Started the car up, began to reverse off the drive and it stalled. tried to start it up and nothing. After 3 hous of checking what seemed like everything. Still no joy. Gave t a rest for an hour and it started on the button.

Today, changed a load of bits one by one and checked for the spark that isnt there.

Changed, ecu, map sensor, crank sensor,coil, phase sensor, ign amp, checked pin voltages all fine.

Have voltage at coil and all the right places.

What the hell is going on. I have no spark.

Any help would be very much appreciated

 

Can anyone help me.

im pulling my hair out.

I still have no spark.

Only thing i havent changed looking back is the map sensor, but im sure this wouldnt stop it from sparking.

( have 12 volts at the coil lead. Whats going on )

 

is the gap correct for the tdc sensor (white one at the bottom of the crank pulley) should be 0.6 to 0.7 mm against the lobes...

other than that, a duff ignition amp...

or some cruddy connectors on the wiring loom

 

The crank sensor gap is checked and fine.
ign amp i have changed
ecu wise, i have checked the pin resistance and voltages everywhere that i could and all come up ok.

 

ecu power relay, fuel pump relay? these are fairly common, if theyve gone fooked it wont go,, does the fuel pump run when you go to click 2 on the switch...

other thing is if the donkey has been out,, a loos earth connection, what are the 2 earths like on the inlet manifold at the back at the bottom ? are these loose or corroded OR got silicone sealant around them

others to check, main body earth where the battery neg goes to the inner wing, are these nice and clean?

 

immobiliser?i had it on my car.loose/corroded connection.

 

Earths are sweet.

Car doesnt have an immob as it is a track car, also, has seperate fuel cell and fuel wiring.

Will go out now and double check the pin resistance, spoke to A1 today, reccomnded i double check again

 

Ok, just done another check.

Between pincs 3 &4 has the 300 - 1200 ohms
But no 2v when cranking

same with pins 5 &23
Have ohms but no volts when cranking.

Im so lost now.

 

i had this with a 2wd cosworth checked every thing but the map sensor and still had no joy as soon as i changed the 3 bar map sensor for a new one it fired up straght away

 

God bless you dave.

Changed the map sensor. She started on the button.