Injector #1 not firing??

[suprafanatic]

Since my car has been missing out under boost I randomly decided today to feel the injectors while the car was running. To see if they were pulsing. I found that injectors 2-5 were pulsing pretty good. #1 injector I felt no pulse at all, and #6 had a slight pulse to it but not as strong as 2-5 did. Does this mean #1 isnt firing? The car runs just fine untill i hit around 15-16psi thats when it starts poping/breaking up. Any ideas?

 

[funky_monkey58]

how does the plug from #1 look?

Also 1&6 2&3 4&5 fire together.

 

[suprafanatic]

Ok, so if 1/6 fire together would that mean its a wiring problem?? i doubt both injectors are bad. I can feel a pulse from #6 but its a weak one.

 

[suprafanatic]

The plug on #1 looks fine to me. Im going to a friends house now we are going to check the plugs for voltage and see what we find.

 

[funky_monkey58]

Could easily be a small wiring problem if it is in fact not firing....

Did you repair the cps wiring?

 

[suprafanatic]

Ok we checked the injector plugs for voltage. All plugs were getting around 12.8 volts. so its not a wiring problem.. Does this mean the injector is bad if i cant feel it pulsing? Im wondering about #6 injector to, the pulse is very weak, almost cant feel it.

yes i rewired the CPS. Didnt fix anything.

 

[funky_monkey58]

Did you check the air gaps inside the cps?

 

[suprafanatic]

I have no idea how to check the air gaps in the CPS, nor do i know what that means to do so..lol

 

[dbsupra90]

have you rechecked timing?

also, you can swap injector #1 and #2 to see if the problem moves. that will tell you if its the injector or not.

 

[suprafanatic]

well we checked the power going to the plugs and they are all getting power, so it would seem the problem would have to be in the injector. I just dont see how the car would run if the injector is bad. but there is absolutly no pulse that i can feel in injector 1

 

[bluepearl]

Check the ground side.