Cranks but no start after head gasket replacement

suprasick

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Mar 17, 2006
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Milton, Washington
So the car runs if you add a fuel source like ether or carb cleaner?
Yes. If I disconnect the fuel pump. Badly of course but it runs.

Without ether, when I pull the plugs they are drenched in fuel. I used a potentiometer connected to the water temp circuit and got the injector pulse down to 8ms. And the plugs are still covered in fuel. I then turned the fuel pressure down as far as it can go to 20psi and still the same problem.

Each time I try something new I have to remove all the plugs to clean and dry them off.
 
Last edited:

figgie

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thought I circle around back on this.

if your fuel injectors are drenched, and the injectors seem to be injecting correctly via the o-scope reading.


That leaves;
the cold start injector staying open all the time.
Injectors are stuck open across the board
the wiring to the fuel injectors is hitting a ground point somewhere

Since you swapped out TCCS for the EMS and still the same problem, it starts to sound like fuel injector wiring hitting ground.