Hey guys I'm new to this forum and need a little help! I need to change out 7 fuel injectors on my 1990 Corvette. A few shops have quoted me at 1000 dollars for the entire job! Well, I don't have that kind of money so I need help finding fuel injectors for cheap and if anybody knows where I can get a DIY guide/diagram to do this project myself I would be very greatful. Thanks! -Cooter

 

1.) Get a GM Shop Manual form ebay or www.helminc.com This will have all the info you need and then some.

2.) SLP has LS1 takeoff injectors that will work but are higher flow rate so some driveability issues might crop up. I don't know were to find stock-ish injectors at a fair price.

 

Check www.fiveomotorsport.com. Sounds funny huh? Ford injectors in our prized possesion??? I believe they have some very good prices on the cheap. For $1000 you could buy a tool set, chest, helms manual, and still have some money for beer and pizza. That's crazy! For the factory service manual go to www.helminc.com and spend the money! Don't buy the chilton's manual. They just don't get involved enough with our toys.

 

I couldn't find the link to the factory service manual. Also, couldn't find anything about fuel injectors that would work for the C4 on the Ford page. I must be blind! Some direct links if possible? Thanks for your help guys!

 

http://www.fiveomotorsport.com/Injector_SetsTPI.asp for injectors. The helms manual you're on your own. They are there though!!!!!

 

Thanks again goldeneye! You are the shiznit! Also, I have heard that the C4 stock fuel injectors are notorious for being pieces of garbage after so many miles. Any idea if the Bosch ones on the website will be better than the originals from chevy? I really don't want to do this again in another 40,000 miles!

 

I put a set Bosh injectors this year. I got from a frend who bought them from TPIS and put about about 1k on them. This along with an adj fuel reg and the car runs good. The pintial area is different from the stock ones. there smaller and a bit longer. I beleve they have a better spray patter especialy with a higher fuel pressure

 

Thanks guys for all your help! Hopefully I can get a service manual and somebody with a little know how and get this beast back to health without any further problems!

 

Where are you located?

 

Another satisfied Bosch user here

 

To do the job you'll need:
TOOLS
1 T45 bit
1 3/8" drive ratchet and assorted extensions
1 10mm socket
1 set of standard wrenches
1 set of metric wrenches
1 rubber mallet

CONSUMEABLES
1 upper intake gasket set for your car
1 tube of antisieze

Start by removing the throttle cable, cruise control cable and transmission TV cable from the throttle body.
Disconnect the battery neg cable.
Remove the air inlet duct from the throttle body.
Remove the vacuum lines from the throttle body.
Remove the heater hoses from the throttle body (including the one from TB to intake)
Remove vacuum lines from back of plenum and MAP sensor
Disconnect electrical connector from MAP sensor.
Disconnect electrical connectors from the throttle body (TPS & IAC)
Remove the torx bolts from the runners to plenum.
Smack the plenum at the front with the mallet to get it loose.
Slowly lift the plenum up. On the under side in the back LH side there is an electrical connector for the MAT sensor..remove it.
Remove the plenum.
Remove connectors from the injectors
Remove the fuel feed and return lines from the fuel rail.
Remove the fuel rail bolts.
Grasp the fuel rails and firmly pull upward. The injectors will pull out of the manifold and stay with the fuel rails. It may take some manuvering, remove the fuelrails & injectors from the engine and put on a workbench.
There is a lock clip on each injector where it plugs into the fuel rail. Using a screwdriver, push against the longer tang on the clips and rotate them to release the injectors. Remove the injectors from the rails (may take some effort).
Take the new injectors and lube the upper O rings with clean engine oil. Put the locking clips on the new injectors (not really required) and lock them in place.
Assemble in reverse order using antisieze on the bolts.
The bolts just need to be snug, run them down until they stop and go 1/8-1/4 turn more.

 

Let me caution you here, those vacuum lines are very brittle now!

Do this gently, mine just pulled up with out any smack or anything.

This is also true. Though not required why take the risk. If you end up with the LS1s you need to use a dremel with a small cutting disc to bring the grooves the locking clips go into full circle so you can use them. It really isn't that hard and I will fill you in if you need more help.

Man Morley, great write-up!