Fuel injector LOUD clicking.

[comsoldier20]

Finished my clutch install. And took the car for a spin (2g gst)

car has some hesitation. There is a very loud clicking, almost sounds like electricity arcing. seems to be coming from my fueling injector #2. engine seems to be miss firing at idle and the exhaust smells rich. (engine rocks back in forth every few seconds). When I unplug injector #2 there is no change in idle or performance. If I push the gas pedal engine revs as normal. if I disconnect injectors 1,3 or 4 the idle drops and the engine comes close to stalling. when i reconnect 1,3 or 4 engine returns to normal function of misfiring every few seconds and rpms increase to 800 to 900.

here is the weird bit. when I disconnect injector #2 the clicking still occurs. but since my idle doesn't change like when I disconnect the other injectors I believe it is safe to assume that injector #2 is bad. my spark plugs have spark so I don't believe that is an issue.

I am picking up a set of 4 injectors tomorrow that are from a 1G (blue tops 450cc) from craigslist.
are these injectors a direct replacement? I can't find info on the compatibility between 1G and 2G turbo injectors. My plan is to simply swap out the "bad" injector with one of the blue tops and see if the clicking goes away.

does anyone have any input or advice? My car is generally stock in regards to my intake, injectors, ignition. I have installed 3rd gen lifters so I doubt that is the clicking. my oil pressure is also normal on the stock gauge.

Update: Just checked resistance on all four injectors. they all read 2.4 ohms. even injector #2.

 

[luv2rallye]

Sounds like your head rebuild wasn't done properly and one of cyl 2 valves is not seating (perhaps not lapped properly).

 

[comsoldier20]

I just got the head off and all of the valves look fine. I turned my crank so that all the pistons are half way and equal. I poured in about an inch of oil in each cylinder. its been a few hours and the levels haven't changed so it seems that the piston rings are fine. I am wondering if the cylinder head or block could be warped? i don't know what my next step should be.

 

[luv2rallye]

With head upside down and plugs in, and cams turned so cyl 2 valves are closed, put water around them and wait 10 minutes to see if it leaks through.

 

[comsoldier20]

thanks rallye! forgot about this test.

Here is the link to the new thread. I'm still having problems diagnosing the compression loss

http://www.dsmtuners.com/forums/maintenance-repairs/462779-no-compression-cyl-2-a.html

FINAL UPDATE: problem fixed, there was no compression due to bad camshaft base circle grind by crower. the base circle was slightly too thick causing the valve to not fully close. switching to used camshafts fixed the problem.

 

[rayray3k]

Wow ima have to a compression test to