car pulsates under load when in power mode

[jrd1990zr1]

Originally Posted by Mahogaraunch

I noticed when you quoted the part # from Summit for the secondaries, that the part appeared to be primaries only. I called Summit and the only secondaries they stated they had were for $180 per injector. Not sure if this part you quoted would work as secondaries?

Sorry guys, im not a handy tech guy like you all seem, and doing this job myself is out of my league by a long stretch. The references to Ohm's do confuse me. I have a good rapport with my garage in town but they have not worked on an LT5 before. I'm really not sure where to turn next as I brought the car to the garage and had the fuel filter replaced, the throttle body cleaned, and some injector cleaner placed in the tank. They thought if I drove it for a bit it would correct the problem. I took it out for a drive but as the weather has been crap have not had an opportunity to really drive it. I can hear the vaccuum pump running for several seconds when I turn the key to the accessory position, so that would not appear to be the problem.

Not sure if I want to invest $1400 for a set of 8 secondaries plus however long it takes the garage to install it without knowing for sure thats my problem with the car. With everything I read on this board I am confident the secondaries are my problem, but just not 100% sure.

Thanks for any input you guys have.

I had similar problems with both my 1990s. Was bad secondary injectors caused by the E10 in gas.

FWIW, I bought a set of 16 injectors from Jon Banner (Fuel Injector Connection) for under $400. http://fuelinjectorconnection.com/shop/

http://www.corvetteinjectors.com/sho....php?groupid=3

Replaced them myself. I am definately not a tech guy. This was the first time I ever tried to do a repair such as this. If you use the instructions here on the registry and have a new set of primary o-rings and a spare set of plenum gaskets from Jerry's gaskets the job isn't that difficult. http://jerrysgaskets.com/store2/root/

Just make sure to drain the coolant down enough and use the procedure to refill coolant. This is probabily the most difficult part.