E85 Injector Issues... Anyone?

[Goat Blower]

I don't think this is related to E85 at all. We were working on that same problem on a car that didn't use E85.

[turbotalon1g]

^Care to expand?

I think that it could be from tuning, cause i know the tune on my 1600s wasn't perfect and they were messed up, looked like the tip was melted.

[twack]

I just pulled my PTE 1000cc injectors and they seem to be perfectly clean, I have been running e85 on the stock lines and dual pumps in the tank.

[turbotalon1g]

I pulled my sending unit apart the other day and The insulating sock/tube that goes around the pump was all shriveled and brittle.

[Archertsi]

I don't think this is related to E85 at all. We were working on that same problem on a car that didn't use E85.


GSXTACY had the same problem with his 950's. I wasn't sure what it was but I had thought maybe it was from improper cam timing since it was a 2.4 with 2.4 cam gears. I figured the intake valve was opening too early and exhaust was going past and burning the tips of the injectors.

I have verified on my 2.4 while it was on the stand that neither mitsu cam gears (either 2.0 or 2.4) get fp3 or fp3x cams in correct time. Degreeing the cam is the only "true" correct way to get those cams in correct time with a 2.4 block and belt. I also verified it with FP.

Anyway, he swapped his 950's for 1150's. The car never did run right, poor idle, kinda a "popping" out the exhaust and flowing the wrong amount of air at idle. So he bought adjustable cam gears and I degreed the cams in. Car ran perfectley after and flowed the correct amount of lbs/min.

That was last fall, we never did get to re-tune the car. This spring I'll tell him he should check his injectors.

I am running the older FIC 1600's with 3000 miles on them. I guess I should pull them and check them too.

Just something to think about. I doubt all of these cars that are having this problem have these cams and 2.4. I doubt they have improper cam timing, but again just a thought. Could exhaust be getting past the intake valve?

[Swifty1638]

its sad, but most people don't even degree their cams..it's just thrown on stock gears, and buttoned up.

-A. Swift

[turbotalon1g]

^Because most people buy cams that can be dropped in.

Also I know that it is best to degree cams, but not every setup calls for paying for cam gears that cost as much as the cams.

[Archertsi]

The problem is, nobody makes a cam for a 2.4 block and 2.4 timing belt. All the dowel postions on the cam are made for 2.0 or 2.3. The car may run, but perfect timing is not possible on a 2.4 with out degreeing.

[Swifty1638]

even so aaron, NO cam is PERFECT right ot the box, dropped in. measure them all, and nothing would be on. Some are closer then others, but still..not perfect.

-A. Swift

[asshanson]

Back on topic.. on link some guy has been doing chemical analysis on the black goo. Apparently it's nothing related to combustion, he concentrated a gallon of e85, got rid of the ethanol and some other stuff (complicated process I don't understand), and was left with a gooey substance of the same chemical compound. So it's definitely coming from the fuel itself, not lines or anything like that.

They still don't know why it's in the fuel, but they are hypothesizing that it could be molecules that dissolve in gas but with the high ethanol content sometimes break out and build up. People who occasionally run a tank of regular 91 don't seem to have the goop problem anymore.

This was all done in the past couple days so I'm sure more info will be available soon.