Fueling & Injection - a couple fuel/injector questions
03-01-2009, 05:44 PM
Im putting in an MS3 cam and planning on upgrading to 42# injectors. My question is am I going to screw stuff up by driving it untuned to the tuner shop? Ittl be about a 150 mile drive. Ive got a trailer and its no problem to trailer it just wondering how hard on it driving it would be.
Question number 2 is I noticed that I have a teeny fuel leak on the front of my drivers side fuel rail where that little black plastic cap is. Its oober slow and I just noticed it. probably makes one drip ever 3+ minutes.
car is my 2000 camaro LS1
I would search but its been broke for 6 days now... :mad2:
03-01-2009, 07:33 PM
I wouldn't drive it. When you smell how rich the car is going to run with those new injectors, you'll agree. When I upgraded to 60# injectors, the cloud of smoke when I pulled the car onto the trailer was awe-inspiring. And, I didn't change my cam or anything else in the motor. If you're going from a stock cam to an MS3, the car probably wouldn't run worth a crap even with the stock fuel system.
If the fuel rail is leaking, then the Schrader valve in there is bad. You need to buy a Schrader valve tool to remove the old one, and replace it with a new one. The cap itself does not seal the end of the rail.
03-01-2009, 08:03 PM
You are going to have to trailer or buy a new motor and then have to trailer it anyways.
03-01-2009, 09:26 PM
ok ill trailer it for sure. kinda what i planned on doing any way.
I assume GM would be able to get that Schrader valve right? and would somewhere like oreilly or auto zone have the tool?
03-01-2009, 10:05 PM
I don't think that an auto parts store would have one. I've never bought one, but I'd expect an air conditioning supply place to have it. Schrader valves are used a lot in A/C systems.
Also, I forgot to mention that it's possible (however, unlikely) that it's just loosened up and isn't actually bad. I'd be a lot more inclined to believe that the valve is bad, though.
03-01-2009, 10:09 PM
if you put in those injectors, it ABSOLUTELY NEEDS TO BE TUNED. you risk washing your motor with fuel.
change injectors = change tune.
03-01-2009, 10:55 PM
Yea i'll trailer it for sure.
That schrader valve looks looks like it could be a pita. Anyone know of a how to anywhere? Since i still cant search.
03-02-2009, 01:12 AM
The valve is easy. The tool is a couple dollars at AutoZone and you can go to a tire shop and ask for a spare valve stem. It's the same little thing on the inside.
Hopefully that is the problem and not a crack around the fitting.
03-02-2009, 01:02 PM
ok. when I get home ill get it apart and see what happens thanks.
03-05-2009, 04:02 PM
hey just got that valve from gm. after i get it in there do i need to bleed the system? it will surly get air in it right. any advice?
03-06-2009, 09:29 AM
Shraeder r&r tool for cheap...
Goto the tire shop, and pick up a couple used tubless tire valve stems, and a couple caps w/ the removal "tool" on the end. Put a drop of Loctite on the stem threads, and tighten the cap on.
WALA!! A neat tool for the tool box, and a spare.. all for free.
Wouldn't hurt to buy a couple new valves, and include them in the box. [I have mine in an old fuse box].
03-06-2009, 09:25 PM
just put the valve in and it fixed it! we had a valve stem tool at our shop so i used that. didnt put any loctite on it tho... ill do it tomorrow. should i purge that that valve a few times when the system is charging to get the air out before I start it?