Fuel Injector Service

[Jagdpanzer]

I came across these guys at Carlisle:
http://www.neweraperformanceparts.co...74&NID=3466896
They have very reasonable prices for testing and cleaning our type of fuel injectors. They also have replacements injectors on hand for those which are found to be beyond help. Maybe something to consider doing over the winter.

[1990 quasar blue]

Our injectors are known for dying shortly after cleaning. It's happened to more than a few.

Originally Posted by 1990 quasar blue

Our injectors are known for dying shortly after cleaning. It's happened to more than a few.

That is correct. Save your money and put the 200 bucks towards new injectors.

[Jagdpanzer]

Originally Posted by 1990 quasar blue

Our injectors are known for dying shortly after cleaning. It's happened to more than a few.

I'm from diesel engine industry and this is a standard practice since Hector was a pup. What do you believe the reasons are ZR-1 injectors don't take to cleaning and testing? Inquiring minds have to know. I don't want to be guilty of handing out bad advise.

[tomcat]

Originally Posted by Jeffvette

That is correct. Save your money and put the 200 bucks towards new injectors.

[tomtom72]

At some point in the 90's the G & EPA added methanol(?) or some alky to gas to replace some other additive that was real bad for pollution. The early multitec injectors, 91 & back, were not designed with the alky in mind. The later ones, 92 & up I think, were redone to resist the alky.

In theory the multitec design lends it self to be a self cleaning injector. The alky with the early injectors does in the epoxy on the coil windings & the seals that are suppossed to keep it out....hence the coil shorting issues causing r&r of the older multitecs. That's the way I understand the situation.


Tom

[DaveK]

Originally Posted by tomtom72

At some point in the 90's the G & EPA added methanol(?) or some alky to gas to replace some other additive that was real bad for pollution. The early multitec injectors, 91 & back, were not designed with the alky in mind. The later ones, 92 & up I think, were redone to resist the alky.

Tom

If that's the case should I be looking to change the injectors? I have a '91 and all the gas up here has 15% alchohol.

[GOLDCYLON]

Yep GM even put a release out on the original injectors. Dont do it. Save your bucks and get some RCs or give the Accels a try

[Aurora40]

The plus of that service might be the testing. Though once you know what your injectors each flow, I'm not sure what exactly you can do about it, except maybe pair them up so that together they all flow close to the same total amount?

It's ethanol that is used in gasoline. Really though the EPA introduced requirements to oxygenate gas. In most places they used other stuff, not ethanol, as ethanol is expensive to ship. I want to say mostly MBTE was used? But I might be wrong about the acronym. Anyway, now I don't think that can be used because it can pollute groundwater. Most states have outlawed it. So ethanol is generally used as the oxygenate.

Apparently them early injectors can't handle it (and weren't built to, as it wasn't around in 1990). It seems like most new injectors are built to handle up to 10% ethanol, which currently is the most that can be put in reformulated gasoline I believe.

I suppose maybe we should be glad it's only injectors that go, as I suppose it could eat through rubber o-rings, fuel tank liners, who the heck knows what.

[1990 quasar blue]

Originally Posted by Aurora40

The plus of that service might be the testing. Though once you know what your injectors each flow, I'm not sure what exactly you can do about it, except maybe pair them up so that together they all flow close to the same total amount?

A little info on this.

http://www.zr1specialist.com/HAT%20W...%20testing.htm