Just purchased my first 'vette, and it has a leaky injector. Pretty sure they are stock. What injector and vendor do you guys recommend? Wouldn't mind more power as long as other mods aren't needed. Confused about what pressure as well. Also, will newer scanners read the older vettes? Any help/advise is greatly appreciated. Does have a 'check engine' light on and throttle response has maybe a fell second of lapse. Car hasn't been driven much in a year or two.

 

Welcome to the forum.
Not sure how you determined that you have a leaky injector. But if you want to change injectors, I would recommend staying stock unless you're going to make other changes in the engine. More fuel by itself will not necessarily increase power. Not sure what year yours is but in '96 they changed the diagnostic system to OBD II which requires a different scanner than the OBD I system. First you need to find out what is the cause of the check engine light. Most auto parts stores will scan your vehicle for free. I'd run a couple of bottles of Techron II through it to see if that has any effect. You will probably need to get a copy of the factory service manual in order to determine the fuel system pressure.

 

Sorry, it's an '85 model, also when running fuel seeps slightly around the outside of the injector. The OBD II, can it scan my '85? Or maybe a better question is can newer scanners pull codes off of an older car like mine?

 

I thought you meant the injector was leaking internally into the manifold.
I doubt the OBD II scanner will work on yours. Not sure the connector is even the same.

 

Thanks, I purchase both old and new style scanners.

 

For OBDI you can check codes with a jumper wire or paper clip as described in many posts or in the factory service manual. That will give you the number that you can look up in the FSM or online. The tricky part is that even with the specific code(s), you will usually find that a lot of different issues can cause the same code, i.e., the code is not as specific as you would probably like in order to ID the problem, but at least it will narrow things down a bit. Also, sometimes you will get multiple codes that are caused by the same issue. FYI, the OBD II scanners are for cars built '96 or newer and will NOT work on OBD I cars which were usually pre-'96. Welcome to the forum, good luck and don't forget the wave!

 

The factory service manual will give you troubleshooting trees for each code.

 

For your older Corvette, the simplest solution is to replace the leaky injector with a stock or OEM-style injector. If you want a slight power improvement without other mods, you could go with slightly higher-flow injectors, but make sure your fuel system (pump, rail pressure, regulator) can handle it and the PCM is tuned accordingly. Fuel pressure on most stock Corvettes is around 58 psi, so match injectors to that. For diagnostics, not all modern scanners will read older Corvettes. You need a scanner that supports the correct OBD‑1/OBD‑1.5 GM protocol for your year to read codes and live data properly.

 

I doubt that Jerry is still around over 5 years later to see your advice. You need to check the age of the post you're responding to.

 

That was still a good response.