SVTconfused

I was hopeing a simple tuneup would of fixed the miss... however it did not...

Heres what ive done

-Ngk tr5's gapped to .050
-replaced the wires
-Swapped the coil pack and injector to a different cylinder
-checked for vac leaks... no avail

Now ive taken a stethoscope and could physically hear the injector hammering on number 6 just like the rest of them... and i could not hear any valvetrain noise what so ever... so i did a compression test on it and it came back 155-160psi of compression... should be plenty to fire...

I thought i had it fixxed when i noticed the number 6 injector had a deteriorated o-ring... nope... didnt fix it...

Whats up?

Is the injector just not seeing the proper voltage?

Unhooking the injector changes it ever so slightly...

the cylinder honestly appears to be dead...

outkast6991

iTrader: (34)

Did you check rockers and springs?

SVTconfused

nope... i got mad enuff to stop... especially considering i was at work and not getting paid for being there cuz i was working on my own stuff...

But i think your onto the same thing im thinking...

LS6427

iTrader: (2)

Have you bounced of the rev limiter lately....could have a bent valve.

.

SVTconfused

i havent even driven the car other than in and out of the shop... which is fun... it needs a clutch badd....

I just bought the car off my buddy and im trying to get it back to road worthy shape

SVTconfused

anyone happen to know the proper voltage going to an injector?

PontiacFan

iTrader: (104)

Bent push-rod, bent or burnt valve, ...
Swap injectors to see if it follows the injector.
Are they all consistent?
Or is #6 different than the others?

SVTconfused

ive swapped injectors... and it just stays on number 6 with a hardon...

i need to get a leakdown gauge and go from there... snap-on man stops by thursday...

only thing is i hear no noise coming from that valvecover... at all

Homer's Uncle

Ignition on you should have 12V constant to each injector on one wire and the other wire is ground, the PCM uses ground side to pulse the injectors to control injector flow.
It is best to have a noid light and unplug injector to see how well that injector is or isn't being pulsed by PCM.

Chris

SVTconfused

No progress on it today other than I know I have voltage goin to the injector... and finally heard a lifter tap on cold startup... but ls motors are known for this correct...

GMtechmatt

check for leaking injector or not seating valve with leakdown test

SVTconfused

Cylinder #6 bent valve or bad seat... water leaked thru the intake port past the valve once I had the head on the bench...