The Top DSM Community on the Web

For 1990-1999 Mitsubishi Eclipse, Eagle Talon, Plymouth Laser, and Galant VR-4 Owners. Log in to remove most ads.

Please Support Fuel Injector Clinic
Please Support STM Tuned

Resolved 2G E85 Lean Issue

This site may earn a commission from merchant
affiliate links, including eBay, Amazon, and others.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

CountryDSM

Proven Member
177
22
Dec 13, 2012
Chandler, Arizona
Quick rundown on fuel side.

New Fuel lab Filter 818 with -6 AN lines. Stock lines from the tank
New Walbro 450lph E85
Edelbrock/SX AFPR with -6 AN lines to rail. (It has been tested good)
1000 ID Injectors hardwired in, not plug and play adapters.

So this is the scoop. Switched to E85 last year and got the car tuned. Have had quite a number of problems after switching to E85 but I finally have been in the clear until now. First the plug and play adapters that I was using with the injectors kept cutting in and out. Hardwired them in and it was good. Walbro 255 died. Installed 450lph. Plenty of fuel, back on the road. Stock fuel filter was clogged, installed Fuel lab 818. Back to boosting.

Now while doing a pull the other night, my vacuum line popped off of the AFPR. That little hose about caused a grenade. Obviously it went immediately lean, got off it and drove it home. Put it back on with a tight clamp. Went back out to check and to my surprise the car still went lean. Right when I get into boost and fuel pressure needs to rise it goes straight to 14+. I made the tune pig rich, still when boost starts to hit, same problem. I wanted to make sure it was happening only on boost. I boost leak checked the car. Found out another vacuum line popped off of the intake manifold on the left back side. Fixed. Went for another drive, same deal. I thought the AFPR was bad, pressure tested it and used my buddies good and working Fuel lab AFPR. Same deal.

I do not think my fuel filters would clog in 2 days. The o-ring in the fuel pump was perfect when installed. I have not checked injectors for goo, which I am about to do so we haven't ruled that out yet. Other than that, I must be missing something small that caused this, I just don't know what it could be.

Any thoughts?
 
You should start by posting a log, so we can verify it's not a tuning issue.

When you swapped the fuel pump, what did the tank look like? Was the pickup sock dirty?

What's your base fuel pressure set at, and how are you monitoring fuel pressure in real time?
 
I had similar issues when I had fuel lab filter and -6an line. Injectors and filter kept clogging. Like within 100mi. So I went back to stock fuel lines and filter and never had any issues after that.
 
I had similar issues when I had fuel lab filter and -6an line. Injectors and filter kept clogging. Like within 100mi. So I went back to stock fuel lines and filter and never had any issues after that.
Hm, that's odd. I'll have to see what happens. Curious as to why that would happen? I switched to the fuel lab filter to avoid that exact issue because I read about the element used in the stock fuel filter getting eaten up by E85 over time.
 
Hm, that's odd. I'll have to see what happens. Curious as to why that would happen? I switched to the fuel lab filter to avoid that exact issue because I read about the element used in the stock fuel filter getting eaten up by E85 over time.
You know I'm getting similar ethanol as you, and I am on the stock fuel filter and fuel lines as well. I changed my filter after first running a few hundred miles on e85, but it was not actually clogged. Even with this shit humidity and heat, no issues with the fuel setup. I'm running a single 255 not rewired to 1150 FICs with a bolt on SX FPR.

*My 95 has a braided setup with an Aeromotive filter and has not clogged either, 1600cc Fics with a single 255 in tank pump.
 
Hm, that's odd. I'll have to see what happens. Curious as to why that would happen? I switched to the fuel lab filter to avoid that exact issue because I read about the element used in the stock fuel filter getting eaten up by E85 over time.

Yeah that's BS misinformation posted all over every E85 thread.

I live in Houston where it's so humid, you can practically drink the air. Never had an issue with the stock lines and filter for the better part of 5 years. It's still possible you're getting some bad E85, maybe try a different station next fill up if you can.

If you're really picky, you could buy this: https://www.amazon.com/Holley-26-14...TF8&qid=1466918199&sr=8-2&keywords=e85+tester and test it next time you're at the pump make sure you're getting a good percentage.
 
Well, glad to know that's BS information. Thanks.

You know I'm getting similar ethanol as you, and I am on the stock fuel filter and fuel lines as well. I changed my filter after first running a few hundred miles on e85, but it was not actually clogged. Even with this sh** humidity and heat, no issues with the fuel setup. I'm running a single 255 not rewired to 1150 FICs with a bolt on SX FPR.

*My 95 has a braided setup with an Aeromotive filter and has not clogged either, 1600cc Fics with a single 255 in tank pump.

Yeah I don't get it. I have a brand new stock fuel filter I can swap on. Where to do you fill up at? I go to the Buckys on 84th near W Center and the Kum and Go on 144th and Q.
 
Support Vendors who Support the DSM Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Innovation Products Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications MyMitsubishiStore.com RixRacing RockAuto RTM Racing STM Tuned

Latest posts

Build Thread Updates

Vendor Updates

Latest Classifieds

Back
Top