Hello everybody, this is one of my first post in which I need some help or advice. I just installed a new KA24DE in my 92 Nissan 240sx Fastback. The problem I am currently having is cylinder #4 not responding. I am getting a compression reading of 170psi (dry tested) on cylinder #4. I pulled the plug and grounded it, got spark action going on. I pulled the injector harness off of cylinder #4 and there was no drop in engine RPM. I did check for codes and I got code 34 (Detonation).
Since I am getting spark, and have good compression, what would you FreshAlloy members think the problem can be? The KA24DE I picked up came from the beach side of california. Would the salty atmosphere cause the injector 4 to not work properly?
Any help will be greatly appreciated!
Need help/advice on Injectors.
if you pulled the plug on that injector and didnt notice any difference in the performance of the engine then thats a good sign that that injector is bad and that the car is already doing without any of its help. have you tried pulling the injector and tapping a power source to it to see if it pulses. p.s. this isnt fresh alloy and i know you know that just tellinya before someone else does.
The most possible cause is a leaky injector o-ring in the fuel rail. To see if the injector is still 'good' you can put an ohm meter on the two contacts and should get a reading of ~11 ohms. If this is true for your injector all you need to do is pull it out and put new o-rings in. Do a search on FA about 'removing injectors' there's some good techniques out there.