Injector Problems

[GreddyGo]

Hey Guys,

Went to start my car this arvo, since it had been sitting there for a while....

On the first start, it was miss firing quite badly, with a strong Fuel odour.

I switched my car off and could continue to hear a hissing sound, noticed my fuel switch was left on, and when turned off the noise disappeared.

I continued to diagnose and removed the loom's off all the injectors and turned the fuel back on, and the hissing noise came back (sounds like injector 1)

So I have come to the conclusion that my injector is seized open??? Or do the injector's stay open when disconnected (I highly doubt as they would continue to leak when car switched off)

Would taking them to an injector specialist help? or are they pretty much gone once this happens?

Cheers

[SargeRX8]

Your diagnosis sounds right. Injectors are always shut and only open when given a pulse. Try tap the injector cap. Then again when you think about it, it want seized when you turned turned it off last. If its a stock injector just replace it.

[blind_elk]

The injectors should be normally closed until switching power is applied.

It's probable that some gum has developed around the needle of 1 or more injectors. The cheapest option right now is to take them out and have them all sonic cleaned. This will at least give you an idea of whether or not they are still serviceable or if they need to be replaced. Adding injector cleaner when the injectors are this far gone has the same result as setting fire to a $20 note.

[markdem]

i cant speak for gtr, but my gtsts injectors only open with power applied. you might want to get an oscilloscope hooked up to the loom as the injector might be fine but the loom may be screwed. wouldnt bother sending them to a specialist. its usually cheaper to buy another injector 2nd hand

[GreddyGo]

Cheers guys, they are sard 700cc, so would really like t a repair option. Lol.

Markdem: this happens when the loom has been disconnected, so its purely a problem with the injector itself.